Infiniti QX56 (Z62). Manual — part 1171
SEC-74
< DTC/CIRCUIT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
B2555 STOP LAMP
Is the inspecting result normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
REPLACE BCM
1.
Replace BCM. Refer to
BCS-81, "Removal and Installation"
.
2.
Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
5.
CHECK STOP LAMP SWITCH CIRCUIT
1.
Disconnect stop lamp switch connector.
2.
Check continuity between stop lamp switch harness connector and BCM harness connector.
3.
Check continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace harness.
6.
CHECK STOP LAMP SWITCH
SEC-74, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace stop lamp switch. Refer to
BR-20, "Removal and Installation"
.
7.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000006226224
1.
CHECK STOP LAMP SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect stop lamp switch connector.
3.
Check continuity between stop lamp switch terminals.
(+)
(–)
Condition
Voltage (V)
(Approx.)
BCM
Connector
Terminal
M68
9
Ground
Brake pedal
Depressed
Battery voltage
Not depressed
0
Stop lamp switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
E115
2
M68
9
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E115
2
Not existed
B2555 STOP LAMP
SEC-75
< DTC/CIRCUIT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
BR-20, "Removal and Installation"
.
Stop lamp switch
Condition
Continuity
Terminal
1
2
Brake pedal
Not depressed
Not existed
Depressed
Existed
SEC-76
< DTC/CIRCUIT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
B2556 PUSH-BUTTON IGNITION SWITCH
B2556 PUSH-BUTTON IGNITION SWITCH
DTC Logic
INFOID:0000000006226225
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Press push-button ignition switch under the following condition.
-
Brake pedal: Not depressed
2.
Release push-button ignition switch and wait 100 seconds or more.
3.
Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT-III.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006226226
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 4.
NO
>> GO TO 2.
2.
CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1.
Disconnect BCM connector 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?
YES
>> GO TO 3.
NO
>> Repair or replace harness.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
B2556
PUSH-BTN IGN SW
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
M101
4
Ground
12
Push-button ignition switch
BCM
Continuity
Connector
Terminal
Connector
Terminal
M101
4
M71
100
Existed
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M101
4
Not existed
B2556 PUSH-BUTTON IGNITION SWITCH
SEC-77
< DTC/CIRCUIT DIAGNOSIS >
[WITH INTELLIGENT KEY SYSTEM]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
3.
REPLACE BCM
1.
Replace BCM. Refer to
BCS-81, "Removal and Installation"
.
2.
Perform initialization of BCM and registration of all Intelligent Keys using CONSULT-III.
For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.
>> INSPECTION END
4.
CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT
Check continuity between push-button ignition switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness.
5.
CHECK PUSH-BUTTON IGNITION SWITCH
SEC-77, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace push-button ignition switch. Refer to
SEC-156, "Removal and Installation"
.
6.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000006226227
1.
CHECK PUSH-BUTTON IGNITION SWITCH
1.
Turn ignition switch OFF.
2.
Disconnect push-button ignition switch connector.
3.
Check continuity between push-button ignition switch terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace push-button ignition switch. Refer to
SEC-156, "Removal and Installation"
.
Push-button ignition switch
Ground
Continuity
Connector
Terminal
M101
1
Existed
Push-button ignition switch
Condition
Continuity
Terminal
1
4
Push-button ignition
switch
Pressed
Existed
Not pressed
Not existed
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