Nissan Tiida C11. Manual - part 560

EC-890

< COMPONENT DIAGNOSIS >

[MR18DE]

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

13.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-55, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Repair or replace harness or connectors.

14.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunction electric throttle control actuator.

2.

Go to 

EC-890, "Special Repair Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001161862

1.

CHECK THROTTLE CONTROL MOTOR

1.

Disconnect electric throttle control actuator harness connector.

2.

Check resistance between electric throttle control actuator terminals as follows.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Go to 

EC-890, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000001161863

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-694, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-694, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

Terminals

Resistance

5 and 6

Approx. 1 - 15 

Ω

 [at 25 

°

C (77

°

F)]

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-891

< COMPONENT DIAGNOSIS >

[MR18DE]

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P1124, P1126 THROTTLE CONTROL MOTOR RELAY

Description

INFOID:0000000001161864

Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.

DTC Logic

INFOID:0000000001161865

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.

Witch DTC is detected?

P1126 >> GO TO 2.
P1124 >> GO TO 3.

2.

PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P1126

1.

Turn ignition switch ON and wait at least 2 seconds.

2.

Start engine and let it idle for 5 seconds.

3.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-891, "Diagnosis Procedure"

.

NO

>> INSPECTION END

3.

PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P1124

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-891, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001161866

1.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Check the voltage between ECM harness connector terminals as follows.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1124

Throttle control motor 
relay circuit open

ECM detects a voltage of power source for 
throttle control motor is excessively low.

• Harness or connectors

(Throttle control motor relay circuit is 
open)

• Throttle control motor relay

P1126

Throttle control motor 
relay circuit short

ECM detect the throttle control motor relay is 
stuck ON.

• Harness or connectors

(Throttle control motor relay circuit is 
shorted)

• Throttle control motor relay

EC-892

< COMPONENT DIAGNOSIS >

[MR18DE]

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector.

3.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness connectors.

4.

CHECK FUSE

1.

Disconnect 15A fuse (No. 52) from IPDM E/R.

2.

Check 15A fuse for blown.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace 15A fuse.

5.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Check the voltage between ECM harness connector terminals as follows.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 6.

6.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Check the continuity between ECM harness connector and IPDM E/R harness connector.

2.

Also check harness for short to ground and short to power.

(+)

(–)

Voltage

Connector

Terminal

Connector

Terminal

F10

15

E16

108

Battery voltage

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E43

8

F10

15

Existed

(+)

(–)

Condition

Voltage

Connector

Terminal

Connector

Terminal

F10

2

E16

108

Ignition switch OFF

Approx. 0V

Ignition switch ON

Battery voltage

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E46

32

F10

2

Existed

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-893

< COMPONENT DIAGNOSIS >

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E8, F8
• Harness for open or short between ECM and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness connectors.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-55, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.