Infiniti G37 Coupe. Manual - part 549

P1090, P1093 VVEL ACTUATOR MOTOR

EC-377

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

>> INSPECTION END

Component Inspection (VVEL ACTUATOR SUB ASSEMBLY)

INFOID:0000000001910900

1.

CHECK VVEL ACTUATOR SUB ASSEMBLY

1.

Turn ignition switch OFF.

2.

Remove VVEL actuator sub assembly. Refer to 

EM-84, "Disassembly and Assembly"

.

3.

Turn the ball screw shaft to check that it works smoothly.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE VVEL ACTUATOR SUB ASSEMBLY

1.

Replace VVEL actuator sub assembly.

2.

Go to 

EC-377, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000001910902

1.

PERFORM VVEL CONTROL SHAFT POSITION SENSOR ADJUSTMENT

Refer to 

EC-21, "VVEL CONTROL SHAFT POSITION SENSOR ADJUSTMENT : Special Repair Require-

ment"

.

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-19, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

EC-378

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1091 VVEL ACTUATOR MOTOR RELAY

P1091 VVEL ACTUATOR MOTOR RELAY

Description

INFOID:0000000001736773

Power supply for the VVEL actuator motor is provided to the VVEL control module via VVEL actuator motor
relay. VVEL actuator motor relay is ON/OFF controlled by the VVEL control module. In addition, when the
VVEL actuator motor relay cannot be controlled by the VVEL control module for some reason, it ON/OFF con-
trolled by ECM.

DTC Logic

INFOID:0000000001736774

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test. 
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 seconds.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON and wait at least 1 seconds.

4.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-378, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001736775

1.

VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Check the voltage between VVEL actuator motor relay harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1091

VVEL actuator motor relay circuit

• VVEL control module detects the 

VVEL actuator motor relay is stuck 
OFF.

• VVEL control module detects the 

VVEL actuator motor relay is stuck 
ON.

• Harness or connectors

(VVEL actuator motor relay circuit is 
open or shorted.)
(Abort circuit is open or shorted.)

• VVEL actuator motor relay
• VVEL control module
• ECM

VVEL actuator motor relay

Ground

Voltage

Connector

Terminal

E16

2

Ground

Battery voltage

5

P1091 VVEL ACTUATOR MOTOR RELAY

EC-379

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

DETECT MALFUNCTIONING PART

Check the following.
• 50A fusible link (letter N)
• Harness for open or short between VVEL actuator motor relay and battery

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

3.

VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-II

1.

Disconnect VVEL control module harness connector.

2.

Disconnect VVEL actuator motor relay harness connector.

3.

Check the continuity between VVEL actuator motor relay harness connector and VVEL control module
harness connector.

4.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

VVEL ACTUATOR MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

 Check the continuity between VVEL actuator motor relay harness connector and VVEL control module
harness connector.

2.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK VVEL ACTUATOR MOTOR RELAY

Refer to 

EC-380, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace VVEL actuator motor relay.

6.

CHECK ABORT CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check the continuity between VVEL control module harness connector and ECM harness connector.

3.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK INTERMITTENT INCIDENT

VVEL control module

VVEL actuator motor relay

Continuity

Connector

Terminal

Connector

Terminal

E15

23

E16

1

Existed

VVEL control module

VVEL actuator motor relay

Continuity

Bank

Connector

Terminal

Connector

Terminal

1

E15

13

E16

3

Existed

2

1

VVEL control module

ECM

Continuity

Connector

Terminal

Connector

Terminal

E15

21

F101

28

Existed

EC-380

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P1091 VVEL ACTUATOR MOTOR RELAY

Refer to 

GI-38, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair or replace.

8.

REPLACE VVEL CONTROL MODULE

1.

Replace VVEL control module.

2.

Go to 

EC-17, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MOD-

ULE) : Special Repair Requirement"

.

>> GO TO 9.

9.

PERFORM DTC CONFIRMATION PROCEDURE

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “SELF-DIAG RESULTS” mode with CONSULT-III.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

EC-378, "DTC Logic"

.

 With GST

1.

Turn ignition switch ON.

2.

Select Service $04 with GST.

3.

Perform DTC Confirmation Procedure.
See 

EC-378, "DTC Logic"

.

Is the DTC P1091 displayed again?

YES

>> GO TO 10.

NO

>> INSPECTION END

10.

REPLACE ECM

1.

Replace ECM.

2.

Go to 

EC-16, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair

Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001736776

1.

CHECK VVEL ACTUATOR MOTOR RELAY

1.

Turn ignition switch OFF.

2.

Remove VVEL actuator motor relay.

3.

Check the continuity between VVEL actuator motor relay termi-
nals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace VVEL actuator motor relay.

Terminal

Condition

Continuity

3 and 5

12V direct current supply between 
terminals 1 and 2

Existed

No current supply

Not existed

JMBIA0876ZZ