Infiniti QX56 (Z62). Manual — part 328
DAS
C1A05 BRAKE SW/STOP LAMP SW
DAS-349
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
C1A05 BRAKE SW/STOP LAMP SW
DTC Logic
INFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DTC “C1A05” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
"ADAS CONTROL UNIT : DTC Logic"
.
Diagnosis Procedure
INFOID:0000000006228189
1.
CHECK SELF-DIAGNOSIS RESULTS
1.
Perform “All DTC Reading” with CONSULT-III.
2.
Check if the “U1000” is detected other than “C1A05” in “Self Diagnostic Result” of “ICC/ADAS”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
DAS-374, "ADAS CONTROL UNIT : DTC Logic"
.
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
Check that “STOP LAMP SW” and “BRAKE SW” operate normally in “DATA MONITOR” of “ICC/ADAS”.
Is the inspection result normal?
YES
>> GO TO 3.
NO-1
>> When “BRAKE SW” operation is malfunctioning: GO TO 4.
NO-2
>> When “STOP LAMP SW” operation is malfunctioning: GO TO 9.
3.
CHECK STOP LAMP SWITCH
Check that “STOP LAMP SW” operate normally in “DATA MONITOR” of “ABS”.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> GO TO 9.
4.
CHECK ICC BRAKE SWITCH INSTALLATION
1.
Turn ignition switch OFF.
2.
Check ICC brake switch for correct installation. Refer to
BR-7, "Inspection and Adjustment"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Adjust ICC brake switch installation. Refer to
BR-7, "Inspection and Adjustment"
5.
ICC BRAKE SWITCH INSPECTION
1.
Disconnect ICC brake switch connector.
2.
Check ICC brake switch. Refer to
DAS-352, "Component Inspection (ICC Brake Switch)"
Is the inspection result normal?
DTC
(On board dis-
play)
Trouble diagnosis
name
DTC detecting condition
Possible causes
C1A05
(5)
BRAKE SW/STOP L
SW
A mismatch between a stop lamp switch signal
and a ICC brake switch signal received from
ECM and a stop lamp signal received from the
ABS actuator and electric unit (control unit) con-
tinues for 10 seconds or more with vehicle
speeds at approximately 40 km/h or more
• Stop lamp switch circuit
• ICC brake switch circuit
• Stop lamp switch
• ICC brake switch
• Incorrect stop lamp switch installa-
tion
• Incorrect ICC brake switch installa-
tion
• ECM
• ABS actuator and electric unit (con-
trol unit)
DAS-350
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C1A05 BRAKE SW/STOP LAMP SW
YES
>> GO TO 6.
NO
>> Replace ICC brake switch.
6.
CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1.
Turn the ignition switch ON.
2.
Check voltage between ICC brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair the harnesses or connectors.
7.
CHECK HARNESS BETWEEN ICC BRAKE SWITCH AND ECM
1.
Turn ignition switch OFF
2.
Disconnect ECM connector.
3.
Check for continuity between ICC brake switch harness connector and ECM harness connector.
4.
Check for continuity between ICC brake switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair the harnesses or connectors.
8.
PERFORM SELF-DIAGNOSIS OF ECM
1.
Connect all connectors again if the connectors are disconnected.
2.
Turn ignition switch ON.
3.
Perform “All DTC Reading”.
4.
Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. Refer to
.
Is any DTC detected?
YES
>> Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO
>> Replace the ADAS control unit. Refer to
DAS-63, "Removal and Installation"
9.
CHECK STOP LAMP SWITCH INSTALLATION
1.
Turn ignition switch OFF.
2.
Check stop lamp switch for correct installation. Refer to
BR-7, "Inspection and Adjustment"
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Adjust stop lamp switch installation. Refer to
BR-7, "Inspection and Adjustment"
.
10.
STOP LAMP SWITCH INSPECTION
1.
Disconnect stop lamp switch connector.
2.
Check stop lamp switch. Refer to
DAS-352, "Component Inspection (Stop Lamp Switch)"
.
Is the inspection result normal?
YES
>> GO TO 11.
Terminals
Voltage
(Approx.)
(+)
(-)
ICC brake switch
Ground
Connector
Terminal
E68
1
Battery voltage
ICC brake switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E68
2
E80
147
Existed
ICC brake switch
Ground
Continuity
Connector
Terminal
E68
2
Not existed
DAS
C1A05 BRAKE SW/STOP LAMP SW
DAS-351
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C
D
E
F
G
H
I
J
K
L
M
B
N
P
A
NO
>> Replace stop lamp switch.
11.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Turn the ignition switch ON.
2.
Check voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair the harnesses or connectors.
12.
CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM
1.
Turn ignition switch OFF
2.
Disconnect ECM, rear combination lamp and high-mounted stop lamp connectors.
3.
Check for continuity between stop lamp switch harness connector and ECM harness connector.
4.
Check for continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Repair the harnesses or connectors.
13.
CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1.
Disconnect ABS actuator and electric unit (control unit) connector.
2.
Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit
(control unit) harness connector.
3.
Check for continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair the harnesses or connectors.
Terminals
Voltage
(Approx.)
(+)
(-)
Stop lamp switch
Ground
Connector
Terminal
E115
1
Battery voltage
3
Stop lamp switch
ECM
Continuity
Connector
Terminal
Connector
Terminal
E115
2
E80
158
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E115
2
Not existed
Stop lamp switch
ABS actuator and electric
unit (control unit)
Continuity
Connector
Terminal
Connector
Terminal
E115
4
E36
17
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E115
4
Not existed
DAS-352
< DTC/CIRCUIT DIAGNOSIS >
[LDW & LDP]
C1A05 BRAKE SW/STOP LAMP SW
14.
PERFORM SELF-DIAGNOSIS OF ECM
1.
Connect all connectors again if the connectors are disconnected.
2.
Turn ignition switch ON.
3.
Perform “All DTC Reading”.
4.
Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. Refer to
.
Is any DTC detected?
YES
>> Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO
>> GO TO 15.
15.
PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”. Refer to
Is any DTC detected?
YES
>> Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO
>> Replace the ADAS control unit. Refer to
DAS-63, "Removal and Installation"
Component Inspection (ICC Brake Switch)
INFOID:0000000006228190
1.
CHECK ICC BRAKE SWITCH
Check for continuity between ICC brake switch terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ICC brake switch.
Component Inspection (Stop Lamp Switch)
INFOID:0000000006228191
1.
CHECK STOP LAMP SWITCH
Check for continuity between stop lamp switch terminals.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch.
Terminal
Condition
Continuity
1
2
When brake pedal is depressed
Not exist-
ed
When brake pedal is released
Existed
Terminal
Condition
Continuity
1
2
When brake pedal is depressed
Existed
When brake pedal is released
Not exist-
ed
3
4
When brake pedal is depressed
Existed
When brake pedal is released
Not exist-
ed
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