Nissan Murano Z51 (2008 year). Manual - part 225

POWER SUPPLY AND GROUND CIRCUIT

HAC-75

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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POWER SUPPLY AND GROUND CIRCUIT

A/C AUTO AMP.

A/C AUTO AMP. : Description

INFOID:0000000003073089

COMPONENT DESCRIPTION

A/C Auto Amp. (Air Conditioner Automatic Amplifier)

The A/C auto amp. (1) has a built-in microcomputer that processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor(s), the mode door motor, the
intake door motor, the upper ventilator door motor, the blower motor
and the compressor are then controlled.
When the various switches and temperature control switch are oper-
ated, data is input to the A/C auto amp. from the A/C control.

Power Supply and Ground Circuit for A/C Auto Amp.

A/C AUTO AMP. : Component Function Check

INFOID:0000000003073090

1.

CHECK OPERATION

1.

Press the AUTO switch, and then check that “AUTO” is shown on the display. 

2.

Operate the temperature control switch (driver side). Check that the fan speed or outlet changes.  (The
discharge air temperature or fan speed varies depending on the ambient temperature, in-vehicle tempera-
ture, and temperature setting.) 

Does it operate normally?

YES

>> INSPECTION END

NO

>> Perform trouble diagnosis for the A/C system. Refer to 

HAC-75, "A/C AUTO AMP. : Diagnosis

Procedure"

.  

A/C AUTO AMP. : Diagnosis Procedure

INFOID:0000000003073091

1.

CHECK A/C AUTO AMP. POWER SUPPLY CIRCUIT

1.

Disconnect the A/C auto amp. connector. 

2.

Check voltage between A/C auto amp. harness connector and ground. 

JPIIA0609ZZ

JPIIA0617GB

Revision: 2008 October

2009 Murano

HAC-76

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

POWER SUPPLY AND GROUND CIRCUIT

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FUSE

Check 10A fuses [Nos. 3, 6 and 19, located in the fuse block (J/B)].
NOTE:
Refer to 

PG-101, "Fuse, Connector and Terminal Arrangement"

.

Is the inspection result normal?

YES

>> Repair the harnesses or connectors.

NO

>> Replace the fuse after repairing the applicable circuit. 

3.

CHECK A/C AUTO AMP. CIRCUIT CONTINUITY

1.

Turn ignition switch OFF.

2.

Check continuity between A/C auto amp. harness connector and ground. 

Is the inspection result normal?

YES

>> Replace the A/C auto amp. 

NO

>> Repair the harnesses or connectors.

A/C CONTROL

A/C CONTROL : Diagnosis Procedure

INFOID:0000000003597955

1.

CHECK A/C CONTROL POWER SUPPLY CIRCUIT

1.

Disconnect the A/C control connector. 

2.

Turn ignition switch ON.

3.

Check voltage between A/C control harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK A/C CONTROL CIRCUIT CONTINUITY

1.

Turn ignition switch OFF.

2.

Check continuity between A/C control harness connector and ground. 

(+)

(

−

)

Voltage

A/C auto amp.

—

Ignition switch position

Connector

Terminal

OFF

ACC

ON

M50

17

Ground

Approx. 0 V

Battery voltage

Battery voltage

20

Approx. 0 V

Approx. 0 V

Battery voltage

40

Battery voltage

Battery voltage

Battery voltage

A/C auto amp.

—

Continuity

Connector

Terminal

M50

19

Ground

Existed

39

(+)

(

−

)

Voltage

A/C control

—

Connector

Terminal

M95

1

Ground

Battery voltage

Revision: 2008 October

2009 Murano

POWER SUPPLY AND GROUND CIRCUIT

HAC-77

< COMPONENT DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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Is the inspection result normal?

YES

>> Replace the A/C control. 

NO

>> Repair the harnesses or connectors.

A/C DISPLAY

A/C DISPLAY : Diagnosis Procedure

INFOID:0000000003597956

1.

CHECK A/C DISPLAY POWER SUPPLY CIRCUIT

1.

Disconnect the A/C display connector. 

2.

Turn ignition switch ON.

3.

Check voltage between A/C display harness connector and ground. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the harnesses or connectors.

2.

CHECK A/C DISPLAY CIRCUIT CONTINUITY

1.

Turn ignition switch OFF.

2.

Check continuity between A/C display harness connector and ground. 

Is the inspection result normal?

YES

>> Replace the A/C display. 

NO

>> Repair the harnesses or connectors.

A/C control

—

Continuity

Connector

Terminal

M95

2

Ground

Existed

(+)

(

−

)

Voltage

A/C display

—

Connector

Terminal

M16

6

Ground

Battery voltage

A/C display

—

Continuity

Connector

Terminal

M16

1

Ground

Existed

Revision: 2008 October

2009 Murano

HAC-78

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

ECU DIAGNOSIS

ECM

Reference Value

INFOID:0000000003671421

VALUES ON THE DIAGNOSIS TOOL

Remarks:

z

 Specification data are reference values.

z

 Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
I.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show

the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.

Monitor Item

Condition

Values/Status

ENG SPEED

Run engine and compare CONSULT-III value with the tachometer indication.

Almost the same speed as 
the tachometer indication.

MAS A/F SE-B1

See 

EC-127, "Description"

.

B/FUEL SCHDL

See 

EC-127, "Description"

.

A/F ALPHA-B1

See 

EC-127, "Description"

.

A/F ALPHA-B2

See 

EC-127, "Description"

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°

C (158

°

F)

A/F SEN1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

Fluctuates around 2.2 V

A/F SEN1 (B2)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

Fluctuates around 2.2 V

HO2S2 (B1)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

0 - 0.3 V 

←→

 Approx. 0.6 - 

1.0 V

HO2S2 (B2)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

0 - 0.3 V 

←→

 Approx. 0.6 - 

1.0 V

HO2S2 MNTR (B1)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

LEAN 

←→

 RICH

HO2S2 MNTR (B2)

• Revving engine from idle to 3,000 rpm quickly after the following conditions 

are met.

- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

LEAN 

←→

 RICH

VHCL SPEED SE

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as 
speedometer indication

BATTERY VOLT

• Ignition switch: ON (Engine stopped)

11 - 14 V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 4.8 V

ACCEL SEN 2*

1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0 V

Accelerator pedal: Fully depressed

4.2 - 4.8 V

Revision: 2008 October

2009 Murano

ECM

HAC-79

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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TP SEN 1-B1

• Ignition switch: ON

(Engine stopped)

• Selector lever: D position

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

TP SEN 2-B1*

1

• Ignition switch: ON

(Engine stopped)

• Selector lever: D position

Accelerator pedal: Fully released

More than 0.36 V

Accelerator pedal: Fully depressed

Less than 4.75 V

FUEL T/TMP SE

• Ignition switch: ON

Indicates fuel tank tempera-
ture

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air tempera-
ture

EVAP SYS PRES

• Ignition switch: ON

Approx. 1.8 - 4.8 V

FUEL LEVEL SE

• Ignition switch: ON

Depending on fuel level of 
fuel tank

START SIGNAL

• Ignition switch: ON 

→

 START 

→

 ON

OFF 

→

 ON 

→

 OFF

CLSD THL POS

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

ON

Accelerator pedal: Slightly depressed

OFF

AIR COND SIG

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates.)

ON

P/N POSI SW

• Ignition switch: ON

Selector lever: P or N position

ON

Selector lever: Except above position

OFF

PW/ST SIGNAL

• Engine: After warming up, idle the 

engine

Steering wheel: Not being turned

OFF

Steering wheel: Being turned

ON

LOAD SIGNAL

• Ignition switch: ON

Rear window defogger switch: ON
and/or
Lighting switch: 2nd position

ON

Rear window defogger switch and lighting 
switch: OFF

OFF

IGNITION SW

• Ignition switch: ON 

→

 OFF 

→

 ON

ON 

→

 OFF 

→

 ON

HEATER FAN SW

• Engine: After warming up, idle the 

engine

Heater fan switch: ON

ON

Heater fan switch: OFF

OFF

BRAKE SW

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

INJ PULSE-B1

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

INJ PULSE-B2

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

IGN TIMING

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

7 - 17

°

BTDC

2,000 rpm

25 - 45

°

BTDC

CAL/LD VALUE

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

5 - 35%

2,500 rpm

5 - 35%

MASS AIRFLOW

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

2.0 - 6.0 g·m/s

2,500 rpm

7.0 - 20.0 g·m/s

Monitor Item

Condition

Values/Status

Revision: 2008 October

2009 Murano

HAC-80

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

PURG VOL C/V

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle
(Accelerator pedal: Not depressed even 
slightly, after engine starting.)

0%

2,000 rpm

—

INT/V TIM (B1)

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

−

5 - 5

°

CA

2,000 rpm

Approx. 0 - 30

°

CA

INT/V TIM (B2)

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

−

5 - 5

°

CA

2,000 rpm

Approx. 0 - 30

°

CA

INT/V SOL (B1)

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

0 - 2%

2,000 rpm

Approx. 0 - 50%

INT/V SOL (B2)

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Idle

0 - 2%

2,000 rpm

Approx. 0 - 50%

VIAS S/V-1

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

When revving engine up to 5,000 rpm 
quickly

OFF 

→

ON 

→

 OFF

VIAS S/V-2

• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

When revving engine up to 5,000 rpm 
quickly

OFF 

→

ON 

→

 OFF

AIR COND RLY

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

ENGINE MOUNT

• Engine: After warming up

Below 950 rpm

IDLE

Above 950 rpm

TRVL

FUEL PUMP RLY

• For 1 second after turning ignition switch: ON
• Engine running or cranking

ON

• Except above

OFF

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

ON

COOLING FAN

• Engine: After warming up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature: 97

°

C 

(206

°

F) or less

OFF

Engine coolant temperature: Between 
98

°

C (208

°

F) and 99

°

C (210

°

F)

LOW

Engine coolant temperature: Between 
100

°

C (212

°

F) and 104

°

C (219

°

F)

MID

Engine coolant temperature: 105

°

C 

(221

°

F) or more

HI

HO2S2 HTR (B1)

• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

ON

• Engine speed: Above 3,600 rpm

OFF

Monitor Item

Condition

Values/Status

Revision: 2008 October

2009 Murano

ECM

HAC-81

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

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HAC

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HO2S2 HTR (B2)

• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at 

idle for 1 minute under no load

ON

• Engine speed: Above 3,600 rpm

OFF

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as 
the tachometer indication

VEHICLE SPEED

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as 
the speedometer indication

IDL A/V LEARN

• Engine: Running

Idle air volume learning has not been per-
formed yet.

YET

Idle air volume learning has already been 
performed successfully.

CMPLT

ENG OIL TEMP

• Engine: After warming up

More than 70

°

C (158

°

F)

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has illumi-
nated.

0 - 65,535 km
(0 - 40,723 miles)

A/F S1 HTR (B1)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

VHCL SPEED SE

• Turn drive wheels and compare CONSULT-III value with the speedometer in-

dication.

Almost the same speed as 
the speedometer indication

SET VHCL SPD

• Engine: Running

ASCD: Operating

The preset vehicle speed is 
displayed

MAIN SW

• Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

CANCEL SW

• Ignition switch: ON

CANCEL switch: Pressed

ON

CANCEL switch: Released

OFF

RESUME/ACC SW

• Ignition switch: ON

RESUME/ACCELERATE switch: 
Pressed

ON

RESUME/ACCELERATE switch: Re-
leased

OFF

SET SW

• Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

BRAKE SW1
(ASCD brake switch)

• Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW2
(Stop lamp switch)

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

VHCL SPD CUT

• Ignition switch: ON

NON

LO SPEED CUT

• Ignition switch: ON

NON

AT OD MONITOR

• Ignition switch: ON

OFF

AT OD CANCEL

• Ignition switch: ON

OFF

CRUISE LAMP

• Ignition switch: ON

MAIN switch: Pressed at the 1st time 

→

 

at the 2nd time

ON 

→

 OFF

SET LAMP

• MAIN switch: ON
• When vehicle speed is between 

40 km/h (25 MPH) and 144 km/h 
(89 MPH)

ASCD: Operating

ON

ASCD: Not operating

OFF

Monitor Item

Condition

Values/Status

Revision: 2008 October

2009 Murano

HAC-82

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.

*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-3, "How to Handle Battery"

.

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values.
• Pulse signal is measured by CONSULT-III.

ALT DUTY

• Engine: Idle

0 - 80%

A/F ADJ-B1

• Engine: Running

−

0.330 - 0.330

A/F ADJ-B2

• Engine: Running

−

0.330 - 0.330

BAT CUR SEN

• Engine speed: Idle

• Battery: Fully charged*

2

• Selector lever: P or N position
• Air conditioner switch: OFF
• No  load

Approx. 2,600 - 3,500 mV

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

Monitor Item

Condition

Values/Status

PBIA9221J

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

1

(P/B)

112

(B)

Fuel injector No. 6

Output

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes de-
pending on rpm at idle

BATTERY VOLTAGE

(11 - 14 V)

3

(L/W)

Fuel injector No. 5

29

(LG/R)

Fuel injector No. 4

30

(R/Y)

Fuel injector No. 3

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

BATTERY VOLTAGE

(11 - 14 V)

31

(R/W)

Fuel injector No. 2

32

(R/B)

Fuel injector No. 1

2

(G/W)

112

(B)

Throttle control motor power 
supply

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

JMBIA0047GB

JMBIA0048GB

Revision: 2008 October

2009 Murano

ECM

HAC-83

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

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G

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A

B

HAC

N

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P

4

(BR/Y)

112

(B)

A/F sensor 1 heater
(bank 1)

Output

[Engine is running]
• Warm-up condition
• Idle speed

(More than 140 seconds after 
starting engine)

2.9 - 8.8 V

5

(L)

112

(B)

Throttle control motor (Open)

Output

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully de-

pressed

0 - 14 V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-

leased

0 - 14 V

6

(P)

112

(B)

Throttle control motor (Close)

Output

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-

leased

0 - 14 V

8

(SB)

112

(B)

A/F sensor 1 heater (bank 2)

Output

[Engine is running]
• Warm-up condition
• Idle speed

(More than 140 seconds after 
starting engine)

2.9 - 8.8 V

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0902GB

JMBIA0031GB

JMBIA0032GB

JMBIA1125GB

JMBIA0030GB

Revision: 2008 October

2009 Murano

HAC-84

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

9

(L/B)

112

(B)

Ignition signal No. 3

Output

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes de-
pending on rpm at idle

0 - 0.2 V

10

(G/R)

Ignition signal No. 2

11

(Y/R)

Ignition signal No. 1

18

(GR/R)

Ignition signal No. 6

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

0.1 - 0.4 V

19

(P)

Ignition signal No. 5

21

(W)

Ignition signal No. 4

12

(B)

—

ECM ground

—

—

—

13

(P/B)

112

(B)

Heated oxygen sensor 2 heat-
er (bank 1)

Output

[Engine is running]
• Engine speed: Below 3,600 

rpm after the following condi-
tions are met

- Engine: after warming up
- Keeping the engine speed be-

tween 3,500 and 4,000 rpm 
for 1 minute and at idle for 1 
minute under no load

10 V

[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 

rpm

BATTERY VOLTAGE
(11 - 14 V)

14

(GR)

112

(B)

Fuel pump relay

Output

[Ignition switch: ON]
• For 1 second after turning ig-

nition switch ON

[Engine is running]

0 - 1.5 V

[Ignition switch: ON]
• More than 1 second after turn-

ing ignition switch ON

BATTERY VOLTAGE
(11 - 14 V)

15

(O)

112

(B)

Throttle control motor relay

Output

[Ignition switch: ON 

→

 OFF]

0 - 1.0 V 

→

 BATTERY VOLTAGE 

(11 - 14 V) 

→

 0 V

[Ignition switch: ON]

0 - 1.0 V

16

(B/Y)

—

ECM ground

—

—

—

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0035GB

JMBIA0036GB

JMBIA0902GB

Revision: 2008 October

2009 Murano

ECM

HAC-85

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

17

(R)

112

(B)

Heated oxygen sensor 2 heat-
er (bank 2)

Output

[Engine is running]
• Engine speed: Below 3,600 

rpm after the following condi-
tions are met

- Engine: after warming up
- Keeping the engine speed be-

tween 3,500 and 4,000 rpm 
for 1 minute and at idle for 1 
minute under no load

10 V

[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 

rpm

BATTERY VOLTAGE
(11 - 14 V)

24

(W/B)

112

(B)

ECM relay
(Self shut-off)

Output

[Engine is running]
[Ignition switch: OFF]
• A few seconds after turning 

ignition switch OFF

0 - 1.5 V

[Ignition switch: OFF]
• More than a few seconds after 

turning ignition switch OFF

BATTERY VOLTAGE
(11 - 14 V)

25

(P/L)

112

(B)

EVAP canister purge volume 
control solenoid valve

Output

[Engine is running]
• Idle speed
• Accelerator pedal: Not de-

pressed even slightly, after 
engine starting

BATTERY VOLTAGE

(11 - 14 V)

[Engine is running]
• Engine speed: approximately 

2,000 rpm (More than 100 
seconds after starting engine)

BATTERY VOLTAGE

(11 - 14 V)

26

(GR/R)*

3

(GR/B)*

4

112

(B)

VIAS control solenoid valve 2

Output

[Engine is running]
• Warm-up condition
• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• When revving engine up to 

5,000 rpm quickly

BATTERY VOLTAGE (11 - 14 V)

↓

0 - 1.0 V

↓

BATTERY VOLTAGE (11 - 14 V)

27

(V)

112

(B)

VIAS control solenoid valve 1

Output

[Engine is running]
• Warm-up condition
• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• When revving engine up to 

5,000 rpm quickly

BATTERY VOLTAGE (11 - 14 V)

↓

0 - 1.0 V

↓

BATTERY VOLTAGE (11 - 14 V)

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0902GB

JMBIA0039GB

JMBIA0040GB

Revision: 2008 October

2009 Murano

HAC-86

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

28

(BR/W)

112

(B)

Electronic controlled engine 
mount control solenoid valve

Output

[Engine is running]
• Idle speed

0 - 1.0 V

[Engine is running]
• Engine speed: More than 950 

rpm

BATTERY VOLTAGE
(11 - 14 V)

33

(W)

112

(B)

Heated oxygen sensor 2 
(bank 1)

Input

[Engine is running]
• Revving engine from idle to 

3,000 rpm quickly after the fol-
lowing conditions are met

- Engine: after warming up
- Keeping the engine speed be-

tween 3,500 and 4,000 rpm 
for 1 minute and at idle for 1 
minute under no load

0 - 1.0 V

34

(W/L)

112

(B)

Heated oxygen sensor 2 
(bank 2)

Input

[Engine is running]
• Revving engine from idle to 

3,000 rpm quickly after the fol-
lowing conditions are met

- Engine: after warming up
- Keeping the engine speed be-

tween 3,500 and 4,000 rpm 
for 1 minute and at idle for 1 
minute under no load

0 - 1.0 V

35

(B)

—

Sensor ground
(Heated oxygen sensor 2)

—

—

—

36

(B)

—

Sensor ground
(Throttle position sensor)

—

—

—

37

(W)

112

(B)

Throttle position sensor 1

Input

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-

leased

More than 0.36 V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully de-

pressed

Less than 4.75 V

38

(R)

112

(B)

Throttle position sensor 2

Input

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully re-

leased

Less than 4.75 V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D position
• Accelerator pedal: Fully de-

pressed

More than 0.36 V

39

(R)

40

(G)

Refrigerant pressure sensor

Input

[Engine is running]
• Warm-up condition
• Both A/C switch and blower 

fan motor switch: ON (Com-
pressor operates)

1.0 - 4.0 V

40

(G)

—

Sensor ground
(Refrigerant pressure sensor)

—

—

—

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

Revision: 2008 October

2009 Murano

ECM

HAC-87

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

41

(O/B)

48

(B/P)

Power steering pressure sen-
sor

Output

[Engine is running]
• Steering wheel: Being turned

0.5 - 4.5 V

[Engine is running]
• Steering wheel: Not being 

turned

0.4 - 0.8 V

42

(BR)

44

(G/B)

Battery current sensor

Input

[Engine is running]

• Battery: Fully charged*

2

• Idle speed

2.6 - 3.5 V

44

(G/B)

—

Sensor ground
(Battery current sensor)

—

—

—

45

(P)

49

(L)

A/F sensor 1 (bank 1)

Input

[Ignition switch: ON]

2.2 V

46

(Y)

52

(B/R)

Engine coolant temperature 
sensor

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with engine 
coolant temperature.

47

(G)

36

(B)

Sensor power supply
(Throttle position sensor)

—

[Ignition switch: ON]

5 V

48

(B/P)

—

Sensor ground
(Power steering pressure 
sensor)

—

—

—

49

(L)

112

(B)

A/F sensor 1 (bank 1)

Input

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

1.8 V
Output voltage varies with air fuel 
ratio.

50

(L/Y)

56

(G/B)

Intake air temperature sensor

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with intake 
air temperature.

51

(R/Y)

44

(G/B)

Sensor power supply
(Battery current sensor)

—

[Ignition switch: ON]

5 V

52

(B/R)

—

Sensor ground
(Engine coolant temperature 
sensor/Engine oil tempera-
ture sensor)

—

—

—

53

(V)

57

(LG)

A/F sensor 1 (bank 2)

Input

[Ignition switch: ON]

2.2 V

54

(G)

52

(B/R)

Engine oil temperature sensor

Input

[Engine is running]

0 - 4.8 V
Output voltage varies with engine 
oil temperature.

55

(SB)

48

(Y)

Sensor power supply
(Power steering pressure 
sensor)

—

[Ignition switch: ON]

5 V

56

(G/B)

—

Sensor ground
(Mass air flow sensor/Intake 
air temperature sensor)

—

—

—

57

(LG)

112

(B)

A/F sensor 1 (bank 2)

Input

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

1.8 V
Output voltage varies with air fuel 
ratio.

58

(O)

56

(G/B)

Mass air flow sensor

Input

[Engine is running]
• Warm-up condition
• Idle speed

0.9 - 1.2 V

[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm

1.6 - 1.9 V

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

Revision: 2008 October

2009 Murano

HAC-88

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

59

(G/W)

64

(B/R)

Sensor power supply
[Camshaft position sensor 
(PHASE) (bank 1)]

—

[Ignition switch: ON]

5 V

60

(Y/B)

—

Sensor ground
[Crankshaft position sensor 
(POS)]

—

—

—

61

(B)

67

(—)

Knock sensor (bank 1)

Input

[Engine is running]
• Idle speed

2.5 V*

1

62

(W)

67

(—)

Knock sensor (bank 2)

Input

[Engine is running]
• Idle speed

2.5 V*

1

63

(R/W)

68

(Y/G)

Sensor power supply
[Camshaft position sensor 
(PHASE) (bank 2)]

—

[Ignition switch: ON]

5 V

64

(B/R)

—

Sensor ground
[Camshaft position sensor 
(PHASE) (bank 1)]

—

—

—

65

(W/B)

60

(Y/B)

Crankshaft position sensor 
(POS)

Input

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes de-
pending on rpm at idle

4.0 - 5.0 V

[Engine is running]
• Engine speed: 2,000 rpm

4.0 - 5.0 V

67

(—)

—

Sensor ground
(Knock sensor)

—

—

—

68

(Y/G)

—

Sensor ground
[Camshaft position sensor 
(PHASE) (bank 2)]

—

—

—

69

(BR/W)

68

(Y/G)

Camshaft position sensor 
(PHASE) (bank 2)

Input

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes de-
pending on rpm at idle

3.0 - 5.0 V

[Engine is running]
• Engine speed is 2,000 rpm

3.0 - 5.0 V

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0041GB

JMBIA0042GB

JMBIA0045GB

JMBIA0046GB

Revision: 2008 October

2009 Murano

ECM

HAC-89

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

70

(W/R)

64

(B/R)

Camshaft position sensor 
(PHASE) (bank 1)

Input

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes de-
pending on rpm at idle

3.0 - 5.0 V

[Engine is running]
• Engine speed is 2,000 rpm

3.0 - 5.0 V

72

(BR/W)

40

(G)

Sensor power supply
(Refrigerant pressure sensor)

—

[Ignition switch: ON]

5 V

75

(Y)

112

(B)

Intake valve timing control so-
lenoid valve (bank 2)

Output

[Engine is running]
• Warm-up condition
• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

7 - 12 V

76

(R/G)

60

(Y/B)

Sensor power supply
[Crankshaft position sensor 
(POS)]

—

[Ignition switch: ON]

5 V

77

(W/L)

112

(B)

Power supply for ECM (Back-
up)

Input

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14 V)

78

(R/L)

112

(B)

Intake valve timing control so-
lenoid valve (bank 1)

Output

[Engine is running]
• Warm-up condition
• Idle speed

BATTERY VOLTAGE
(11 - 14 V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

7 - 12 V

81

(W)

84

(B)

Accelerator pedal position 
sensor 1

Input

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-

leased

0.5 - 1.0 V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-

pressed

4.2 - 4.8 V

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0045GB

JMBIA0046GB

JMBIA0038GB

JMBIA0038GB

Revision: 2008 October

2009 Murano

HAC-90

< ECU DIAGNOSIS >

[WITHOUT 7 INCH DISPLAY]

ECM

82

(O)

100

(G)

Accelerator pedal position 
sensor 2

Input

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-

leased

0.25 - 0.50 V

[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-

pressed

2.0 - 2.5 V

83

(BR)

84

(B)

Sensor power supply
(Accelerator pedal position 
sensor 1)

—

[Ignition switch: ON]

5 V

84

(B)

—

Sensor ground
(Accelerator pedal position 
sensor 1)

—

—

—

85

(Y)

92

(BR)

ASCD steering switch

Input

[Ignition switch: ON]
• ASCD steering switch: OFF

4 V

[Ignition switch: ON]
• MAIN switch: Pressed

0 V

[Ignition switch: ON]
• CANCEL switch: Pressed

1 V

[Ignition switch: ON]
• RESUME/ACCELERATE 

switch: Pressed

3 V

[Ignition switch: ON]
• SET/COAST switch: Pressed

2 V

86

(SB)

96

(GR)

EVAP control system pres-
sure sensor

Input

[Ignition switch: ON]

1.8 - 4.8 V

87

(GR)

100

(G)

Sensor power supply
(Accelerator pedal position 
sensor 2)

—

[Ignition switch: ON]

5 V

88

(O)

—

Data link connector

Input/

Output

—

—

91

(L)

96

(GR)

Sensor power supply
(EVAP control system pres-
sure sensor)

—

[Ignition switch: ON]

5 V

92

(BR)

—

Sensor ground
(ASCD steering switch)

—

—

—

93

(BR)

112

(B)

Ignition switch

Input

[Ignition switch: OFF]

0 V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

Revision: 2008 October

2009 Murano