Infiniti FX35, FX50 (S51). Manual — part 1660
B2014 CHAIN OF STRG-IMMU
SEC-53
< DTC/CIRCUIT 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 result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness.
6.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
Steering lock unit
BCM
Continuity
Connector
Terminal
Connector
Terminal
M40
2
M122
111
Existed
Steering lock unit
Ground
Continuity
Connector
Terminal
M40
2
Not existed
SEC-54
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2555 STOP LAMP
B2555 STOP LAMP
Description
INFOID:0000000005249458
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:0000000005249459
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:0000000005249460
1.
CHECK STOP LAMP SWITCH POWER SUPPLY 1
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
• If NG, repair or replace fuse or harness
2.
CHECK STOP LAMP SWITCH POWER SUPPLY 2
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.
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
(+)
(–)
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M123
116
Ground
Battery voltage
(+)
(–)
Voltage (V)
(Approx.)
Stop lamp switch
Connector
Terminal
E110
3
Ground
Battery voltage
B2555 STOP LAMP
SEC-55
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
NO
>> Check harness for open or short between stop lamp switch and fuse. If NG, repair or replace har-
ness.
3.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Check continuity between stop lamp switch harness connector and BCM harness connector M123.
2.
Check continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness.
4.
CHECK STOP LAMP SWITCH
SEC-55, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace stop lamp switch. Refer to
.
5.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005249461
1.
CHECK STOP LAMP SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch connector.
3.
Check continuity between stop lamp switch terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
.
Stop lamp switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
E110
4
M123
118
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E110
4
Not existed
Stop lamp switch
Condition
Continuity
Terminal
3
4
Brake pedal
Not depressed
Not existed
Depressed
Existed
SEC-56
< DTC/CIRCUIT DIAGNOSIS >
[INTELLIGENT KEY SYSTEM]
B2556 PUSH-BUTTON IGNITION SWITCH
B2556 PUSH-BUTTON IGNITION SWITCH
Description
INFOID:0000000005249462
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:0000000005249463
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:0000000005249464
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 result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1.
Disconnect BCM connector M122 and IPDM E/R connector.
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?
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
B2556
PUSH-BUTTON IG-
NITION SWITCH
BCM detects the push-button ignition
switch stuck at ON for 100 seconds or
more
• Harness or connectors
(Push-button ignition switch circuit is shorted.)
• Push-button ignition switch
• BCM
(+)
(–)
Voltage (V)
(Approx.)
Push-button ignition switch
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
Not existed
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