Infiniti G37 Coupe. Manual — part 1150
B261A PUSH-BUTTON IGNITION SWITCH
SEC-97
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
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B261A PUSH-BUTTON IGNITION SWITCH
Description
INFOID:0000000001700011
BCM transmits the change in the power supply position with the push-button ignition switch to IPDM E/R via
the CAN communication. IPDM E/R transmits the power supply position status via CAN communication to
BCM.
DTC Logic
INFOID:0000000001700012
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
1.
Press push-button ignition switch for 1 second under the following condition.
A/T models
-
A/T selector lever is in the P or N position
-
Do not depress brake pedal
M/T models
-
Do not depress clutch pedal
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> GO to
NO
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE 2
1.
Insert Intelligent Key into the key slot.
2.
Press the push-button ignition switch under the following conditions and wait for at least 1 second.
A/T models
-
A/T selector lever is in the P or N position
-
Do not depress brake pedal
M/T models
-
Do not depress clutch pedal
3.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001700013
1.
INSPECTION START
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B261A
PUSH-BUTTON
IGNITION
SWITCH
BCM detects the mismatch between the following for
1 second or more
• Power supply position with push-button ignition
switch
• Power supply position from IPDM E/R (CAN)
• Harness or connectors
(Push-button ignition switch circuit is
open or shorted)
- Between BCM and push-button igni-
tion switch
- Between IPDM E/R and push-button
ignition switch
SEC-98
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
Check the case in which DTC is detected.
• Case1: It is detected when push-button ignition switch is pressed for 1 second
• Case2: It is detected after Intelligent Key is inserted into key slot and push-button ignition switch is pressed
In which case is DTC detected?
Case1 >> GO TO 2.
Case2 >> GO TO 4.
2.
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 E5.
3.
Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 3.
3.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1.
Disconnect BCM connector M122.
2.
Check continuity between push-button ignition switch harness connector and BCM harness connector.
3.
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
4.
CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2
1.
Turn ignition switch OFF.
2.
Disconnect push-button ignition switch connector and BCM connector M122.
3.
Check voltage between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK PUSH-BUTTON IGNITION SWITCH
1.
Disconnect IPDM E/R connector E5.
2.
Check continuity between push-button ignition switch harness connector and IPDM E/R harness connec-
tor.
Push-button ignition switch
Ground
Voltage (V)
Connector
Terminal
M50
4
Ground
Battery voltage
Push-button ignition switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
M50
4
M122
89
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M50
4
Ground
Not existed
Push-button ignition switch
Ground
Voltage (V)
Connector
Terminal
M50
4
Ground
Battery voltage
B261A PUSH-BUTTON IGNITION SWITCH
SEC-99
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
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SEC
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3.
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END
Push-button ignition switch
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
M50
4
E5
28
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M50
4
Ground
Not existed
SEC-100
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B261E VEHICLE TYPE
B261E VEHICLE TYPE
Description
INFOID:0000000001700014
There are two types of vehicle.
• HEV
• Conventional
DTC Logic
INFOID:0000000001700015
DTC DETECTION LOGIC
NOTE:
• If DTC B261E is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B261E 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.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
SEC-100, "Diagnosis Procedure"
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001700016
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Check “Self diagnostic result” with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
Is the 1st trip DTC B261E displayed again?
YES
>> Replace BCM. Refer to
BCS-79, "Removal and Installation"
NO
>> INSPECTION END
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B261E
VEHICLE TYPE
Difference of BCM configration
• BCM
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