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
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
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 >
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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
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
.
Is the DTC P1091 displayed again?
YES
>> GO TO 11.
NO
>> INSPECTION END
11.
REPLACE ECM
1.
Replace ECM.
2.
EC-579, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (ECM) : Special Repair
.
>> 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 >
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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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