Nissan Tiida C11. Manual - part 585

EC-990

< ECU DIAGNOSIS >

[MR18DE]

ECM

ECU DIAGNOSIS

ECM

Reference Value

INFOID:0000000001611216

VALUES ON THE DIAGNOSIS TOOL

Remarks:

●

 Specification data are reference values.

●

 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 TIMING 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-782, "Diagnosis Procedure"

.

B/FUEL SCHDL

See 

EC-782, "Diagnosis Procedure"

.

A/F ALPHA-B1

See 

EC-782, "Diagnosis Procedure"

.

COOLAN TEMP/S

• Engine: After warming up

More than 70

°

C (158

°

F)

HO2S1 (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

0 - 0.3V 

←→

 Approx. 0.6 - 

1.0V

HO2S2 (B1)

• Revving engine from idle up 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 - 0.3V 

←→

 Approx. 0.6 - 

1.0V

HO2S2 MNTR (B1)

• Engine: After warming up

Maintaining engine speed at 2,000 rpm

LEAN 

←→→

RICH

Change more than 5 times 
during 10 seconds.

HO2S2 MNTR (B1)

• Revving engine from idle up 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 - 14V

ACCEL SEN 1

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.6 - 0.9V

Accelerator pedal: Fully depressed

4.0 - 4.8V

ACCEL SEN 2*

• Ignition switch: ON

(Engine stopped)

Accelerator pedal: Fully released

0.6 - 0.9V

Accelerator pedal: Fully depressed

3.9 - 4.8V

THRL SEN 1-B1

• Ignition switch: ON

(Engine stopped)

• Shift  lever:  1st

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

THRL SEN 2-B1*

• Ignition switch: ON

(Engine stopped)

• Shift  lever:1st

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

INT/A TEMP SE

• Ignition switch: ON

Indicates intake air tempera-
ture

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

ECM

EC-991

< ECU DIAGNOSIS >

[MR18DE]

C

D

E

F

G

H

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J

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EC

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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

Shift lever: Neutral

ON

Selector lever: Except above

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
• Shift lever:Neutral
• 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
• Shift lever:Neutral
• Air conditioner switch: OFF
• No  load

Idle

10

°

 - 20

°

 BTDC

2,000 rpm

25

°

 - 45

°

 BTDC

PURG VOL C/V

• Engine: After warming up
• Shift lever:Neutral
• Air conditioner switch: OFF
• No  load

Idle

0%

2,000 rpm

20% - 90%

INT/V TIM (B1)

• Engine: After warming up
• Shift lever:Neutral
• Air conditioner switch: OFF
• No  load

Idle

−

5

°

 - 5

°

CA

2,000 rpm

Approx. 0

°

 - 20

°

CA

INT/V SOL (B1)

• Engine: After warming up
• Shift lever:Neutral
• Air conditioner switch: OFF
• No  load

Idle

0%

2,000 rpm

Approx. 0% - 60%

AIR COND RLY

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

FUEL PUMP RLY

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

ON

• Except above

OFF

THRTL RELAY

• Ignition switch: ON

ON

COOLING FAN

• Engine: After warming up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature is 97 

°

C 

(207

°

F) or less.

OFF

Engine coolant temperature is between 
98

°

C (208

°

F) and 99

°

C (210

°

F)

LOW

Engine coolant temperature is 100

°

C 

(212

°

F) or more

HIGH

HO2S1 HTR (B1)

• Engine: After warming up
• Engine speed: Above 3,600 rpm

ON

Engine speed: Above 3,600 rpm

OFF

Monitor Item

Condition

Values/Status

EC-992

< ECU DIAGNOSIS >

[MR18DE]

ECM

*: 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.

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

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

O2SEN HTR DTY

• Engine coolant temperature when engine started: More than 80

°

C (176

°

F)

• Engine speed: below 3,600 rpm

Approx. 30%

AC PRESS SEN

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

1.0 - 4.0V

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 and clutch pedal: Fully re-
leased

ON

Brake pedal and/or clutch 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: Between 40 

km/h (25 MPH) and 180 km/h 
(112 MPH)

ASCD: Operating

ON

ASCD: Not operating

OFF

Monitor Item

Condition

Values/Status

ECM

EC-993

< ECU DIAGNOSIS >

[MR18DE]

C

D

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G

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EC

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TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:
• ECM is located in the engine room left side near battery.
- Use extreme care not to 2 pins at one time.
- Data is for comparison and may not be exact.
• Specification data are reference values and are measured between each terminal and ground.
• Pulse signal is measured by CONSULT-III.

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.

PBIA9221J

Terminal No.

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

1

(L)

108

(B)

Throttle control motor 
(Open)

Output

[Ignition switch: ON]
• Engine stopped
• Shift lever: 1st 
• Accelerator pedal: Fully depressed

3.2V

2

(SB)

108

(B)

Throttle control motor re-
lay power supply

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

3

(G)

56

(B)

Heated oxygen sensor 1 
heater

Output

[Engine is running]
• Warm-up condition
• Engine speed: Below 3,600 rpm

2.9 - 8.8V

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

BATTERY VOLTAGE
(11-14V)

4

(P)

108

(B)

Throttle control motor 
(Close)

Output

[Ignition switch: ON]
• Engine stopped
• Shift lever:1st 
• Accelerator pedal: Fully released

1.8V

JMBIA0324GB

JMBIA0325GB

JMBIA0326GB