2011 INFINITI QX56 Factory Service Manual

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Page 3905 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS-64
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
B261A PUSH-BUTTON IGNITION SWITCH
DTC LogicINFOID:0000000006220214
DTC DETECTION LOGIC
NOTE:
If DTC B26

PCS-64
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
B261A PUSH-BUTTON IGNITION SWITCH
DTC LogicINFOID:0000000006220214
DTC DETECTION LOGIC
NOTE:
If DTC B261A is displayed with DTC U1000, first
perform the trouble diagnosis for DTC U1000. Refer to
BCS-70, "
DTC Logic".
If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
BCS-71, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Press the push-button ignition switch under the fo llowing 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 PCS-64, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006220215
1.CHECK IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH)
1. Disconnect push-button ignition swit ch 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 GroundContinuity
Connector Terminal
M101 4 Not existed
Revision: 2010 May2011 QX56

Page 3906 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS
B261A PUSH-BUTTON IGNITION SWITCHPCS-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,

Page 3907 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS-66
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F1 IGNITION RELAY
B26F1 IGNITION RELAY
DTC LogicINFOID:0000000006220216
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CON

Page 3908 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS
B26F1 IGNITION RELAYPCS-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.
Revision: 2010 May2011 QX56

Page 3909 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS-68
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F2 IGNITION RELAY
B26F2 IGNITION RELAY
DTC LogicINFOID:0000000006220218
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CON

Page 3910 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS
B26F2 IGNITION RELAYPCS-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 C

Page 3911 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS-70
< DTC/CIRCUIT DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
B26F6 BCM
B26F6 BCM
DTC LogicINFOID:0000000006220220
DTC DETECTION LOGIC
NOTE:
If DTC B26F6 is displayed with DTC U1000, first perform th

Page 3912 of 5598

INFINITI QX56 2011 Factory Service Manual
PCS
PUSH-BUTTON IGNITION SWITCHPCS-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 CheckINFOID:0000000006220222
1

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