Infiniti QX56 (Z62). Manual — part 977
PCS-64
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
B261A PUSH-BUTTON IGNITION SWITCH
DTC Logic
INFOID:0000000006220214
DTC DETECTION LOGIC
NOTE:
• If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Press the push-button ignition switch 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:0000000006220215
1.
CHECK IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH)
1.
Disconnect push-button ignition switch connector and IPDM E/R connector.
2.
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 (BCM)
1.
Disconnect BCM connector.
2.
Check continuity between BCM harness connector and push-button ignition switch harness connector.
3.
Check continuity between push-button ignition switch harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B261A
PUSH-BTN IGN SW
BCM detects a difference of signal for 1 second or
more between the following items.
• Push-button ignition switch signal
• Push-button ignition switch status signal (CAN)
• Harness or connectors
(Push-button ignition switch circuit
is open or shorted.)
• BCM
• IPDM E/R
(+)
(–)
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
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M101
4
Not existed
PCS
B261A PUSH-BUTTON IGNITION SWITCH
PCS-65
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
Is the inspection result normal?
YES
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
NO
>> Repair or replace harness.
3.
CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
NO
>> GO TO 4.
4.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)
1.
Disconnect IPDM E/R connector.
2.
Check continuity between IPDM E/R harness connector and push-button ignition switch harness connec-
tor.
3.
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness.
5.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
(+)
(–)
Voltage (V)
(Approx.)
IPDM E/R
Connector
Terminal
E17
66
Ground
12
IPDM E/R
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
E17
66
M101
4
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M101
4
Not existed
PCS-66
< DTC/CIRCUIT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B26F1 IGNITION RELAY
B26F1 IGNITION RELAY
DTC Logic
INFOID:0000000006220216
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:0000000006220217
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
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace BCM. Refer to
BCS-81, "Removal and Installation"
3.
CHECK IGNITION RELAY (IPDM E/R) CONTROL SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect BCM and IPDM connectors.
3.
Check continuity between BCM harness connector and IPDM E/R harness connector.
Is the inspection result normal?
YES
>> Replace IPDM E/R.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B26F1
IGN RELAY OFF
BCM transmits the ignition relay control signal
(ON: 0 V) or ignition switch ON signal (ON)
(CAN), but does not receives ignition switch
ON signal (ON) (CAN) from IPDM E/R.
• Harness or connectors
(Ignition relay circuit is open)
• BCM
• IPDM E/R
(+)
(–)
Condition
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M71
98
Ground
Ignition switch
ON
0
BCM
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
M71
98
E17
68
Existed
PCS
B26F1 IGNITION RELAY
PCS-67
< 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.
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