Infiniti G37 Coupe. Manual — part 1140
B2014 CHAIN OF STRG-IMMU
SEC-57
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
4.
Check continuity between steering lock unit harness connector and ground.
Is the inspection normal?
YES
>> GO TO 6.
NO
>> Repair harness or connector.
6.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END.
Steering lock unit
Ground
Continuity
Connector
Terminal
M40
2
Ground
Not existed
SEC-58
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2555 STOP LAMP
B2555 STOP LAMP
Description
INFOID:0000000001699945
BCM detects the stop lamp status and confirms the stop lamp switch ON/OFF status. BCM confirms the
engine start condition according to the stop lamp switch ON/OFF status.
DTC Logic
INFOID:0000000001699946
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Depress the brake pedal and wait for at least 1 second.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END.
Diagnosis Procedure
INFOID:0000000001699947
1.
CHECK STOP LAMP SWITCH INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect BCM connector M123.
3.
Check voltage between BCM harness connector and ground.
Is the inspection normal?
YES
>> GO TO 2.
NO
>>
Check the following.
• 10A fuse [No. 7, located in the fuse block (J/B)]
• Harness for open or short between BCM and fuse.
2.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Disconnect stop lamp switch connector.
2.
Check voltage between stop lamp harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check harness for open or short between stop lamp switch and fuse.
3.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Check continuity between stop lamp switch harness connector and BCM harness connector.
DTC No.
Trouble diagno-
sis name
DTC detecting condition
Possible cause
B2555
STOP LAMP
BCM makes a comparison between the
upper voltage and lower voltage of stop
lamp switch. It judges from their values to
detect the malfunctioning circuit.
• Harness or connectors
(stop lamp switch circuit is open or shorted)
• Stop lamp switch
• Fuse
BCM
Ground
Voltage [V]
Connector
Terminal
M123
116
Ground
Battery voltage
Stop lamp switch
Ground
Voltage [V]
Connector
Terminal
M110
1
Ground
Battery voltage
B2555 STOP LAMP
SEC-59
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
2.
Check continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair harness or connector.
4.
CHECK STOP LAMP SWITCH
SEC-59, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace stop lamp switch.
5.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
>> INSPECTION END.
Component Inspection
INFOID:0000000001699948
1.
CHECK STOP LAMP SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch connector.
3.
Check continuity between stop lamp switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END.
NO
>> Replace stop lamp switch.
Stop lamp switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
E110
2
M123
118
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E110
2
Ground
Not existed
Stop lamp switch
Condition
Continuity
Connector
Terminal
E110
1
2
Brake pedal
Not depressed
Not existed
Depressed
Existed
SEC-60
< COMPONENT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2556 PUSH-BUTTON IGNITION SWITCH
B2556 PUSH-BUTTON IGNITION SWITCH
Description
INFOID:0000000001699949
The switch that changes the power supply position. BCM maintains the power supply position status. BCM
changes the power supply position with the operation of the push-button ignition switch.
DTC Logic
INFOID:0000000001699950
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine and wait for at least 100 seconds.
2.
Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END.
Diagnosis Procedure
INFOID:0000000001699951
1.
CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect push-button ignition switch connector.
3.
Check voltage between push-button ignition switch harness connector and ground.
Is the inspection normal?
YES
>> GO TO 2.
NO
>> GO TO 4.
2.
CHECK PUSH-BUTTON IGNITION SWITCH
SEC-61, "Component Inspection"
.
Is the inspection normal?
YES
>> GO TO 3.
NO
>> Replace push-button ignition switch. Refer to
SEC-228, "Removal and Installation"
.
3.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
>> INSPECTION END.
4.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT FOR SHORT
1.
Disconnect BCM connector M122 and IPDM E/R connector E5.
2.
Check continuity between push-button ignition switch harness connector and ground.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2556
PUSH-BUTTON IG-
NITION SWITCH
BCM detects the push-button ignition
switch stuck to ON for 100 seconds or
more
• Harness or connectors
(Push-button ignition switch circuit is shorted.)
• Push-button ignition switch
Push-button ignition switch
Ground
Voltage [V]
Connector
Terminal
M50
4
Ground
Battery voltage
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