Infiniti FX35, FX50 (S51). Manual - part 862

 

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Infiniti FX35, FX50 (S51). Manual - part 862

 

 

P1091 VVEL ACTUATOR MOTOR RELAY

EC-989

< DTC/CIRCUIT DIAGNOSIS >

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P1091 VVEL ACTUATOR MOTOR RELAY

Description

INFOID:0000000005237464

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:0000000005237465

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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 10 V 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 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-989, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237466

1.

VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect VVEL actuator motor relay.

3.

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

E90

2

Ground

Battery voltage

5

EC-990

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1091 VVEL ACTUATOR MOTOR RELAY

2.

DETECT MALFUNCTIONING PART

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

>> Repair open circuit, 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.

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

3.

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, short to ground or short to power in harness or connectors.

5.

CHECK VVEL ACTUATOR MOTOR RELAY

Refer to 

EC-991, "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 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.

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

E16

13

E90

3

Existed

2

1

VVEL control module

ECM

Continuity

Connector

Terminal

Connector

Terminal

E16

21

F111

65

Existed

P1091 VVEL ACTUATOR MOTOR RELAY

EC-991

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

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• Harness connectors F10, E10
• Harness for open and short between ECM and VVEL control module

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

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair or replace.

9.

REPLACE VVEL CONTROL MODULE

1.

Replace VVEL control module.

2.

Perform 

EC-579, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL

MODULE) : Special Repair Requirement"

.

>> GO TO 10.

10.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC Confirmation Procedure.
See 

EC-989, "DTC Logic"

.

Is the DTC P1091 displayed again?

YES

>> GO TO 11.

NO

>> INSPECTION END

11.

REPLACE ECM

1.

Replace ECM.

2.

Perform 

EC-579, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair

Requirement"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005237467

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

EC-992

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P1148, P1168 CLOSED LOOP CONTROL

P1148, P1168 CLOSED LOOP CONTROL

DTC Logic

INFOID:0000000005237468

DTC DETECTION LOGIC

NOTE:
DTC P1148 or P1168 is displayed with another DTC for A/F sensor 1.
Perform the trouble diagnosis for the corresponding DTC.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1148

Closed loop control 
function (bank 1)

The closed loop control function for bank 1 
does not operate even when vehicle is being 
driven in the specified condition.

• Harness or connectors

(The A/F sensor 1 circuit is open or shorted.)

• A/F sensor 1
• A/F sensor 1 heater

P1168

Closed loop control 
function (bank 2)

The closed loop control function for bank 2 
does not operate even when vehicle is being 
driven in the specified condition.

 

 

 

 

 

 

 

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