Infiniti G37 Coupe. Manual — part 974
PCS
B2616 IGNITION RELAY CIRCUIT
PCS-65
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
3.
Check the continuity between ignition relay terminals under the
following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace Ignition relay
Terminals
Condition
Continuity
3 and 5
12 V direct current supply between terminals 1 and 2
Existed
No current supply
Not existed
PBIB0098E
PCS-66
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B2618 BCM
B2618 BCM
Description
INFOID:0000000001675288
BCM controls the various electrical components and simultaneously supplies power according to the power
supply position.
BCM checks the power supply position internally.
DTC Logic
INFOID:0000000001675289
DTC DETECTION LOGIC
NOTE:
• If DTC B2618 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
.
• If DTC B2618 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 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
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001675290
1.
INSPECTION START
1.
Turn ignition switch ON.
2.
Select “Self diagnostic result” mode with CONSULT-III.
3.
Touch “ERASE”.
4.
Perform DTC Confirmation Procedure.
See
.
Is the 1st trip DTC B2618 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
B2618
BCM
An immediate operation of ignition relay (IPDM E/
R) is requested by BCM, but there is no response
for more than 1 second
• BCM
PCS
B261A PUSH-BUTTON IGNITION SWITCH
PCS-67
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
C
D
E
F
G
H
I
J
K
L
B
A
O
P
N
B261A PUSH-BUTTON IGNITION SWITCH
Description
INFOID:0000000001675291
BCM transmits the change in the power supply position with the push-button ignition switch to IPDM E/R via
the CAN communication line. IPDM E/R transmits the power supply position status via CAN communication
line to BCM.
DTC Logic
INFOID:0000000001675292
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
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
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001675293
1.
CHECK PUSH-BUTTON IGNITION SWITCH OPERATION
Press push-button ignition switch and check if it turns to ON.
Does ignition switch turn to ON?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)
1.
Disconnect push-button ignition switch harness connector.
2.
Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace IPDM E/R. Refer to
PCS-34, "Removal and Installation"
.
3.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)
1.
Disconnect IPDM E/R harness connector E5 and BCM harness connector M122.
2.
Check continuity between IPDM E/R harness connector and push-button ignition switch harness connec-
tor.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B261A
PUSH-BUTTON IG-
NITION SWITCH
BCM detects a difference of signal for 1 second or
more between the following information.
• Power supply position by push-button ignition
switch
• Power supply position from IPDM E/R (CAN)
• Harness or connectors
(Push-button ignition switch circuit
is open or shorted.)
IPDM E/R
Ground
Voltage (V)
Connector
Terminal
E5
28
Ground
Battery voltage
PCS-68
< COMPONENT DIAGNOSIS >
[POWER DISTRIBUTION SYSTEM]
B261A PUSH-BUTTON IGNITION SWITCH
3.
Check continuity between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
4.
CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)
1.
Disconnect push-button ignition switch harness connector.
2.
Check voltage between BCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace BCM. Refer to
BCS-79, "Removal and Installation"
5.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)
1.
Disconnect BCM harness connector and IPDM E/R harness 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
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END
IPDM E/R
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
E5
28
M50
4
Existed
IPDM E/R
Ground
Continuity
Connector
Terminal
E5
28
Ground
Not existed
BCM
Ground
Voltage (V)
Connector
Terminal
M122
89
Ground
Battery voltage
BCM
Push-button ignition switch
Continuity
Connector
Terminal
Connector
Terminal
M122
89
M50
4
Existed
BCM
Ground
Continuity
Connector
Terminal
M122
89
Ground
Not existed
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