Nissan March K13. Manual - part 244

P1121 ELECTRIC THROTTLE CONTROL ACTUATOR

EC-437

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

-

: Vehicle front

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Perform 

XX-XX, "*****"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000006037447

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

JSBIA0341ZZ

EC-438

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

DTC Logic

INFOID:0000000005886561

DTC DETECTION LOGIC

NOTE:
• If DTC P1122 is displayed with DTC P1121, first perform the trouble diagnosis for DTC P1121. Refer

to 

EC-436, "DTC Logic"

.

• If DTC P1122 is displayed with DTC P1126, first perform the trouble diagnosis for DTC P1126. Refer

to 

EC-442, "DTC 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 11 V when
engine is running.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

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-438, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005886562

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

XX-XX, "*****"

. 

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 10.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1122

Electric throttle control 
performance

Electric throttle control function does not 
operate properly.

• Harness or connectors

(Throttle control motor circuit is open or shorted)

• Electric throttle control actuator

ECM

Condition

Voltage

Connector

Terminal

+

−

F7

2

108

Ignition switch OFF

Approx. 0 V

Ignition switch ON

Battery voltage

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

EC-439

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

NO

>> GO TO 3.

3.

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 7.

NO

>> GO TO 4.

4.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II

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 6.

NO

>> GO TO 5.

5.

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.

6.

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 9.

NO

>> Replace 15 A fuse.

7.

CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-III

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 9.

NO

>> GO TO 8.

ECM

Voltage

Connector

Terminal

+

−

F7

15

108

Battery voltage

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E14

57

F7

15

Existed

IPDM E/R

ECM

Continuity

Connector

Terminal

Connector

Terminal

E14

54

F7

2

Existed

EC-440

< DTC/CIRCUIT DIAGNOSIS >

[HR12DE (TYPE 2)]

P1122 ELECTRIC THROTTLE CONTROL FUNCTION

8.

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.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness or connectors.

10.

CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Disconnect ECM harness connector.

4.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

5.

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

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace harness or connectors.

11.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY 

1.

Remove the intake air duct.

2.

Check if foreign matter is caught between the throttle valve (1)
and the housing.

-

: Vehicle front

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

12.

CHECK THROTTLE CONTROL MOTOR

Refer to 

EC-441, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> GO TO 14.

13.

CHECK INTERMITTENT INCIDENT

Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F29

5

F7

1

Not existed

4

Existed

F29

6

F7

1

Existed

4

Not existed

JSBIA0341ZZ