Infiniti QX56 (Z62). Manual — part 978
PCS-68
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B26F2 IGNITION RELAY
B26F2 IGNITION RELAY
DTC Logic
INFOID:0000000006220218
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 2 seconds or more.
-
Selector lever is in the P or N position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006220219
1.
CHECK IPDM E/R SELF-DIAGNOSTIC RESULT
1.
Turn ignition switch ON.
2.
Erase the DTC of IPDM E/R.
3.
Turn ignition switch OFF.
4.
Turn ignition switch ON and check the DTC again.
Is DTC detected?
YES
>> Repair or replace the malfunctioning part. Refer to
NO
>> GO TO 2.
2.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL
1.
Turn ignition switch OFF.
2.
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> GO TO 3.
3.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT - 1
1.
Disconnect BCM and IPDM E/R connectors.
2.
Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B26F2
IGN RELAY ON
BCM transmits the ignition relay control signal
(OFF: 12 V) or ignition switch ON signal (OFF)
(CAN), but does not receives ignition switch
ON signal (OFF) (CAN) from IPDM E/R.
• Harness or connectors
(Ignition relay circuit is short)
• BCM
• IPDM E/R
(+)
(–)
Condition
Voltage (V)
(Approx.)
IPDM E/R
Connector
Terminal
E17
68
Ground
Ignition switch
OFF or ACC
12
IPDM E/R
Ground
Continuity
Connector
Terminal
E17
68
Not existed
PCS
B26F2 IGNITION RELAY
PCS-69
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
NO
>> Repair or replace harness.
4.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT - 2
1.
Connect IPDM E/R connectors.
2.
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
NO
>> Replace IPDM E/R.
(+)
(–)
Condition
Voltage (V)
(Approx.)
IPDM E/R
Connector
Terminal
E17
68
Ground
Ignition switch
OFF or ACC
12
PCS-70
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B26F6 BCM
B26F6 BCM
DTC Logic
INFOID:0000000006220220
DTC DETECTION LOGIC
NOTE:
• If DTC B26F6 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B26F6 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON under the following conditions, and wait for 1 second or more.
-
Selector lever is in the P or N position
-
Do not depress brake pedal
2.
Check “Self-diagnosis result” of BCM with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006220221
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Select “Self-diagnosis result” of BCM with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
Is DTC detected?
YES
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
NO
>> INSPECTION END
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B26F6
BCM
Ignition relay ON signal is not transmitted from IPDM E/
R when BCM turns ignition relay ON.
BCM
PCS
PUSH-BUTTON IGNITION SWITCH
PCS-71
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
PUSH-BUTTON IGNITION SWITCH
Component Function Check
INFOID:0000000006220222
1.
CHECK FUNCTION
1.
Select “PUSH SW” in “Data Monitor” of BCM with CONSULT-III.
2.
Check the push-button ignition switch signal under the following conditions.
Is the indication normal?
YES
>> INSPECTION END.
NO
Diagnosis Procedure
INFOID:0000000006220223
1.
CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1
1.
Turn ignition switch OFF.
2.
Disconnect push-button ignition switch connector and IPDM E/R connector.
3.
Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 1
1.
Disconnect BCM connector.
2.
Check continuity between BCM harness connector and push-button ignition switch harness connector.
3.
Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
NO
>> Repair or replace harness.
3.
CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2
Check voltage between IPDM E/R harness connector and ground.
Test item
Condition
Status
PUSH SW
Push-button ignition switch is pressed
ON
Push-button ignition switch is not pressed
OFF
(+)
(–)
Voltage (V)
(Approx.)
Push-button ignition switch
Connector
Terminal
M101
4
Ground
12
BCM
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
M71
100
M101
4
Existed
BCM
Ground
Continuity
Connector
Terminal
M71
100
Not existed
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