Nissan March K13. Manual - part 245

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

EC-441

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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.

Perform 

XX-XX, "*****"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005886563

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.

Perform 

XX-XX, "*****"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000006037449

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Perform throttle valve closed position learning. Refer to 

EC-105, "Work Procedure"

.

>> GO TO 2

2.

PERFORM IDLE AIR VOLUME LEARNING

Perform idle air volume learning. Refer to 

EC-106, "Work Procedure"

.

>> END

Terminals

Resistance [at 25

°

C (77

°

F)]

5 and 6

Approx. 1 - 15 

Ω

 

EC-442

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

DTC Logic

INFOID:0000000005886566

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 8 V.
Witch DTC is detected?

P1124 >> GO TO 2.
P1126 >> GO TO 3.

2.

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-442, "Diagnosis Procedure"

.

NO

>> INSPECTION END

3.

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-442, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005886567

1.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Check voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1124

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

P1126

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

ECM

Voltage

Connector

Terminal

+

−

F7

15

108

Battery voltage

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

EC-443

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Disconnect ECM harness connector.

2.

Disconnect IPDM E/R harness connector E14.

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 E6, F1
• IPDM E/R connector E14
• Harness for open or short between IPDM E/R and ECM

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

4.

CHECK FUSE

1.

Disconnect 15 A fuse (No. 64) from IPDM E/R.

2.

Check 15 A fuse for blown.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace 15 A fuse.

5.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I

1.

Check voltage between ECM harness connector and ground under the following conditions.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 6.

6.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Disconnect IPDM E/R harness connector E14.

4.

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

5.

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

Is the inspection result normal?

YES

>> GO TO 8.

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F7

15

E14

57

Existed

ECM

Conditions

Voltage

Connector

Terminal

+

−

F7

2

108

Ignition switch: OFF

Approx. 0 V

Ignition switch: ON

Battery voltage

ECM

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

F7

2

E14

54

Existed

EC-444

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1124, P1126 THROTTLE CONTROL MOTOR RELAY

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E6, F1
• IPDM E/R connector E14
• Harness for open or short between IPDM E/R and ECM

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

8.

CHECK INTERMITTENT INCIDENT

Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.