Nissan Murano Z50 (2003 year). Manual - part 87

TROUBLE DIAGNOSIS

EC-111

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EC

Revision; 2004 April

2003 Murano

PBIB1386E

PBIB1293E

EC-112

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

PBIB1294E

TROUBLE DIAGNOSIS

EC-113

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EC

Revision; 2004 April

2003 Murano

Circuit Diagram

ABS004AY

TBWA0339E

EC-114

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

TBWA0340E

TROUBLE DIAGNOSIS

EC-115

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Revision; 2004 April

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ECM Harness Connector Terminal Layout

ABS004AZ

ECM Terminals and Reference Value

ABS004B0

PREPARATION

1.

ECM is located behind the glove box. For this inspection,
remove glove box.

2.

Remove ECM harness connector.

3.

When disconnecting ECM harness connector, loosen it with
levers as far as they will go as shown at right.

4.

Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.

●

Use extreme care not to touch 2 pins at one time.

●

Data is for comparison and may not be exact.

ECM INSPECTION TABLE

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.

MBIB0045E

PBIB1299E

PBIB1512E

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

B

ECM ground

[Engine is running]

●

Idle speed

Engine ground

EC-116

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

2

R/L

Heated oxygen sensor 1 
heater (bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is below 3,600 rpm.

Approximately 8V

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

3

R

Throttle control motor relay 
power supply

[Ignition switch "ON"]

BATTERY VOLTAGE
(11 - 14V)

4

B

Throttle control motor 
(Close)

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal is releasing

0 - 14V

5

W

Throttle control motor 
(Open)

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal is depressing

0 - 14V

6

L/R

Heated oxygen sensor 2 
heater (bank 2)

[Engine is running]

●

Engine speed is 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 one minute and at idle for 
one minute under no load.

0 - 1.0V

[Ignition switch “ON”]

●

Engine stopped

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB0519E

PBIB1104E

PBIB1105E

TROUBLE DIAGNOSIS

EC-117

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Revision; 2004 April

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10

Y

Intake valve timing control 
solenoid valve (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

7 - 12V

11

P/L

Intake valve timing control 
solenoid valve (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

7 - 12V

12

W

Power steering pressure 
sensor

[Engine is running]

●

Steering wheel is being turned.

0.5 - 4.5V

[Engine is running]

●

Steering wheel is not being turned.

0.4 - 0.8V

13

W

Crankshaft position sensor 
(POS)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 1.6V

[Engine is running]

●

Engine speed is 2,000 rpm.

Approximately 1.4V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1037E

PBIB1038E

PBIB1037E

PBIB1038E

PBIB1041E

PBIB1042E

EC-118

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

14

W

Camshaft position sensor 
(PHASE) (bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

1.0 - 4.0V

[Engine is running]

●

Engine speed is 2,000 rpm.

1.0 - 4.0V

15

W

Knock sensor

[Engine is running]

●

Idle speed

Approximately 2.5V

16

LG

Heated oxygen sensor 1 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)

21
22
23

L/W
R/Y
R/B

Injector No. 5
Injector No. 3
Injector No. 1

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

BATTERY VOLTAGE

(11 - 14V)

24

O

Heated oxygen sensor 1 
heater (bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is below 3,600 rpm.

Approximately 8V

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1039E

PBIB1040E

SEC984C

SEC985C

PBIB0519E

TROUBLE DIAGNOSIS

EC-119

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Revision; 2004 April

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25

P/L

Heated oxygen sensor 2 
heater (bank 1)

[Engine is running]

●

Engine speed is 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 one minute and at idle for 
one minute under no load.

0 - 1.0V

[Ignition switch “ON”]

●

Engine stopped

[Engine is running]

●

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

29

G/Y

VIAS control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Engine speed is between 1,800 and 3,600 
rpm.

0 - 1.0V

32

BR

EVAP control system pres-
sure sensor

[Ignition switch “ON”]

Approximately 1.8 - 4.8V

33

Y

Camshaft position sensor 
(PHASE) (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

1.0 - 4.0V

[Engine is running]

●

Engine speed is 2,000 rpm.

1.0 - 4.0V

34

Y/G

Intake air temperature sen-
sor

[Engine is running]

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

35

LG

Heated oxygen sensor 1 
(bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1039E

PBIB1040E

EC-120

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

40
41
42

R/G
L/R
R/W

Injector No. 6
Injector No. 4 
Injector No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

44

BR/W

Electronic controlled engine 
mount-1

[Engine is running]

●

Idle speed

0 - 3.0V

[Engine is running]

●

Except the above

BATTERY VOLTAGE
(11 - 14V)

45

GR/L

EVAP canister purge vol-
ume control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed is about 2,000 rpm (More 
than 100 seconds after starting engine).

BATTERY VOLTAGE

(11 - 14V)

47

G

Sensors' power supply 
(Throttle position sensor)

[Ignition switch “ON”]

Approximately 5V

48

G/O

Sensors' power supply
(EVAP control system pres-
sure sensor)

[Ignition switch “ON”]

Approximately 5V

49

R/W

Sensors' power supply
(Refrigerant pressure sen-
sor)

[Ignition switch “ON”]

Approximately 5V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

SEC990C

SEC991C

TROUBLE DIAGNOSIS

EC-121

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Revision; 2004 April

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50

W

Throttle position sensor 1

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully released

More than 0.36V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully depressed

Less than 4.75V

51

G/W

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

1.1 - 1.5V

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,500 rpm.

1.7 - 2.4V

55

W

Heated oxygen sensor 2 
(bank 2)

[Engine is running]

●

Warm-up condition

●

Revving engine from idle to 3,000 rpm 
quickly after the following conditions are 
met.

–

After keeping the engine speed between 
3,500 and 4,000 rpm for one minute and at 
idle for one minute under no load.

0 - Approximately 1.0V

60
61
62

BR/R
L/R
Y/R

Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1

[Engine is running]

●

Warm-up condition

●

Idle speed

0 - 0.3V

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,500 rpm.

0.1 - 0.6V

63

W/R

Electronic controlled engine 
mount-2

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Except the above

0 - 3.0V

66

B

Sensors' ground
(Throttle position sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

EC-122

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

67

B

Sensors' ground
(MAF sensor / IAT sensor / 
PSP sensor / EVAP control 
system pressure sensor / 
ASCD steering switch / 
Refrigerant pressure sen-
sor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

68

R/Y

Sensors' power supply
(PSP sensor)

[Ignition switch “ON”]

Approximately 5V

69

R

Throttle position sensor 2

[Ignition switch "ON"]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully released

Less than 4.75V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever: "D"

●

Accelerator pedal fully depressed

More than 0.36V

70

W

Refrigerant pressure sensor

[Engine is running]

●

Warm-up condition

●

Both A/C switch and blower switch are “ON”. 
(Compressor operates.)

1.0 - 4.0V

73

Y

Engine coolant temperature 
sensor

[Engine is running]

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

74

W

Heated oxygen sensor 2 
(bank 1)

[Engine is running]

●

Warm-up condition

●

Revving engine from idle to 3,000 rpm 
quickly after the following conditions are 
met.

–

After keeping the engine speed between 
3,500 and 4,000 rpm for one minute and at 
idle for one minute under no load.

0 - Approximately 1.0V

78

B

Sensors' ground
(Heated oxygen sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

79
80
81

GR/R
GR
G/R

Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

0 - 0.3V

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,500 rpm.

0.1 - 0.6V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

TROUBLE DIAGNOSIS

EC-123

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Revision; 2004 April

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82

B

Sensors' ground
(APP sensor 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

83

G

Sensors' ground
(APP sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

85

O

Data link connector

[Ignition switch “ON”]

●

CONSULT-II or GST is disconnected.

Approximately 5V - Battery volt-
age (11 - 14V)

86

Y

CAN communication line

[Ignition switch “ON”]

Approximately 1.1 - 2.3V
Output voltage varies with the 
communication status.

90

R/W

Sensors' power supply
(APP sensor 1)

[Ignition switch “ON”]

Approximately 5V

91

P

Sensors' power supply
(APP sensor 2)

[Ignition switch “ON”]

Approximately 5V

94

L

CAN communication line

[Ignition switch “ON”]

Approximately 2.6 - 3.2V
Output voltage varies with the 
communication status.

98

W/R

Accelerator pedal position 
sensor 2

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully released

0.25 - 0.50V

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully depressed

2.0 - 2.5V

99

G/Y

ASCD steering switch

[Ignition switch “ON”]

●

ASCD steering switch is released.

Approximately 4V

[Ignition switch “ON”]

●

CRUISE switch is pressed.

Approximately 0V

[Ignition switch “ON”]

●

CANCEL switch is pressed.

Approximately 1V

[Ignition switch “ON”]

●

COAST/SET switch is pressed.

Approximately 2V

[Ignition switch “ON”]

●

ACCEL/RESUME switch is pressed.

Approximately 3V

101

R/G

Stop lamp switch

[Ignition switch “ON”]

●

Brake pedal is fully released

Approximately 0V

[Ignition switch “ON”]

●

Brake pedal is depressed

BATTERY VOLTAGE
(11 - 14V)

102

G/W

PNP switch

[Ignition switch “ON”]

●

Shift lever: “P” or “N”

Approximately 0V

[Ignition switch “ON”]

●

Except the above gear position

BATTERY VOLTAGE
(11 - 14V)

104

P/L

Throttle control motor relay

[Ignition switch "OFF"]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch "ON"]

0 - 1.0V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-124

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

106

W

Accelerator pedal position 
sensor 1

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully released

0.5 - 1.0V

[Ignition switch "ON"]

●

Engine stopped

●

Accelerator pedal fully depressed

4.2 - 4.8V

107

R/Y

Fuel tank temperature sen-
sor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel 
tank temperature.

108

L/B

ASCD brake switch

[Ignition switch “ON”]

●

Brake pedal is depressed

Approximately 0V

[Ignition switch “ON”]

●

Brake pedal is fully released

BATTERY VOLTAGE
(11 - 14V)

109

R

Ignition switch

[Ignition switch “OFF”]

0V

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

111

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch “OFF”]

●

For a few seconds after turning ignition 
switch “OFF”

0 - 1.5V

[Ignition switch “OFF”]

●

A few seconds passed after turning ignition 
switch “OFF”

BATTERY VOLTAGE
(11 - 14V)

113

B/P

Fuel pump relay

[Ignition switch “ON”]

●

For 1 second after turning ignition switch 
“ON”

[Engine is running]

0 - 1.5V

[Ignition switch “ON”]

●

More than 1 second after turning ignition 
switch “ON”.

BATTERY VOLTAGE
(11 - 14V)

115
116

B
B

ECM ground

[Engine is running]

●

Idle speed

Engine ground

117

R

EVAP canister vent control 
valve

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

119

120

R/B
R/B

Power supply for ECM

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

121

W

Power supply for ECM 
(Buck-up)

[Ignition switch “OFF”]

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

TROUBLE DIAGNOSIS

EC-125

C

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EC

Revision; 2004 April

2003 Murano

CONSULT-II Function

ABS004B1

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

●

Diagnostic trouble codes

●

1st trip diagnostic trouble codes

●

Freeze frame data

●

1st trip freeze frame data

●

System readiness test (SRT) codes

●

Test values

●

Others

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the 
indications on the CONSULT-II unit.

Self-diagnostic results

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data 
can be read and erased quickly.*

Data monitor

Input/Output data in the ECM can be read.

Data monitor (SPEC)

Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the 
other data monitor items can be read.

CAN diagnostic support 
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Active test

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also 
shifts some parameters in a specified range.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

ECM part number

ECM part number can be read.

EC-126

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK 

SUP-

PORT

SELF-DIAGNOSTIC 

RESULTS

DATA 

MONI-

TOR

DATA 

MONI-

TOR 

(SPEC)

ACTIVE 

TEST

DTC & SRT

CONFIRMATION

DTC*1

FREEZE 

FRAME 
DATA*2

SRT 

STATUS

DTC 

WORK 

SUP-

PORT

ENGI

NE CONTROL 

COMPONENT P

ARTS

INPUT

Crankshaft position sensor (POS)

×

×

×

×

Camshaft position sensor (PHASE)

×

×

×

×

Mass air flow sensor

×

×

×

Engine coolant temperature sensor

×

×

×

×

×

Heated oxygen sensor 1

×

×

×

×

×

Heated oxygen sensor 2

×

×

×

×

×

Vehicle speed sensor

×

×

×

×

Accelerator pedal position sensor

×

×

×

Throttle position sensor

×

×

×

Fuel tank temperature sensor

×

×

×

×

EVAP control system pressure 
sensor

×

×

×

Intake air temperature sensor

×

×

×

×

Knock sensor

×

Refrigerant pressure sensor

×

×

Closed throttle position switch 
(accelerator pedal position sensor 
signal)

×

×

Air conditioner switch

×

×

Park/neutral position (PNP) switch

×

×

×

Stop lamp switch

×

×

×

Power steering pressure sensor

×

×

×

Battery voltage

×

×

Load signal

×

×

Primary speed sensor

×

×

×

Fuel level sensor

×

×

×

ASCD steering switch

×

×

×

ASCD brake switch

×

×

×