Infiniti FX35, FX50 (S51). Manual — part 310
CCS-60
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C1A04 ABS/TCS/VDC SYSTEM
>> WORK END
CCS
C1A05 BRAKE SW/STOP LAMP SW
CCS-61
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
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C1A05 BRAKE SW/STOP LAMP SW
Description
INFOID:0000000005501589
• ICC brake switch is turned OFF and stop lamp switch is turned ON, when depressing the brake pedal.
• ICC brake switch signal and stop lamp switch signal are input to ECM. These signals are transmitted from
ECM to ICC sensor integrated unit via CAN communication.
DTC Logic
INFOID:0000000005501590
DTC DETECTION LOGIC
NOTE:
If DTC “C1A05” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
.
Diagnosis Procedure
INFOID:0000000005501591
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”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
.
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”.
Is the inspection result normal?
YES
>> GO TO 12.
NO-1
>> When “BRAKE SW” operation is malfunctioning: GO TO 3.
NO-2
>> When “STOP LAMP SW” operation is malfunctioning: GO TO 8.
3.
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 4.
NO
>> Adjust ICC brake switch installation. Refer to
BR-7, "Inspection and Adjustment"
4.
ICC BRAKE SWITCH INSPECTION
1.
Disconnect ICC brake switch connector.
2.
Check ICC brake switch. Refer to
CCS-64, "Component Inspection (ICC Brake Switch)"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace ICC brake switch.
DTC
(On board dis-
play)
Trouble diagnosis
name
DTC detecting condition
Possible causes
C1A05
(5)
BRAKE SW/STOP L
SW
If ICC sensor integrated unit receives the ICC
brake switch signal ON status during the stop
lamp switch signal ON status
• 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
CCS-62
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
C1A05 BRAKE SW/STOP LAMP SW
5.
CHECK ICC BRAKE HOLD RELAY
1.
Remove ICC brake hold relay.
2.
Check for continuity between ICC brake hold relay terminals.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace ICC brake hold relay.
6.
CHECK HARNESS BETWEEN ICC BRAKE HOLD RELAY AND ICC BRAKE SWITCH
1.
Check for continuity between ICC brake hold relay harness connector and ICC brake switch harness con-
nector.
2.
Check for continuity between ICC brake hold relay harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Repair the harnesses or connectors.
7.
CHECK HARNESS BETWEEN ECM AND ICC BRAKE SWITCH
1.
Disconnect ECM connector.
2.
Check for continuity between the ECM harness connector and ICC brake switch harness connector.
VQ35HR
VK50VE
3.
Check for continuity between ECM harness connector and ground.
VQ35HR
VK50VE
Is the inspection result normal?
ICC brake hold relay
Continuity
Terminal
3
4
Existed
ICC brake hold relay
ICC brake switch
Continuity
Connector
Terminal
Connector
Terminal
E91
4
E114
1
Existed
ICC brake hold relay
Ground
Continuity
Connector
Terminal
E91
4
Not existed
ECM
ICC brake switch
Continuity
Connector
Terminal
Connector
Terminal
M107
126
E114
2
Existed
ECM
ICC brake switch
Continuity
Connector
Terminal
Connector
Terminal
M160
117
E114
2
Existed
ECM
Ground
Continuity
Connector
Terminal
M107
126
Not existed
ECM
Ground
Continuity
Connector
Terminal
M160
117
Not existed
CCS
C1A05 BRAKE SW/STOP LAMP SW
CCS-63
< DTC/CIRCUIT DIAGNOSIS >
[ICC (FULL SPEED RANGE)]
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YES
>> GO TO 12.
NO
>> Repair the harnesses or connectors.
8.
CHECK STOP LAMP FOR ILLUMINATION
Check the stop lamp for illumination.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair the stop lamp circuit.
9.
CHECK ICC BRAKE HOLD RELAY
1.
Turn ignition switch OFF.
2.
Remove ICC brake hold relay.
3.
Check for continuity between ICC brake hold relay terminals.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace ICC brake hold relay.
10.
CHECK HARNESS BETWEEN ECM AND ICC BRAKE HOLD RELAY
1.
Disconnect ECM, rear combination lamp, and high-mounted stop lamp connectors.
2.
Check for continuity between the ECM harness connector and ICC brake hold relay harness connector.
VQ35HR
VK50VE
3.
Check for continuity between ECM harness connector and ground.
VQ35HR
VK50VE
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Repair the harnesses or connectors.
11.
CHECK HARNESS BETWEEN BRAKE BOOSTER CONTROL UNIT AND ICC BRAKE HOLD RELAY
1.
Disconnect brake booster control unit connector.
2.
Check for continuity between the brake booster control unit harness connector and brake hold relay har-
ness connector.
ICC brake hold relay
Continuity
Terminal
3
4
Existed
7
6
Not existed
ECM
ICC brake hold relay
Continuity
Connector
Terminal
Connector
Terminal
M107
122
E91
6
Existed
ECM
ICC brake hold relay
Continuity
Connector
Terminal
Connector
Terminal
M160
110
E91
6
Existed
ECM
Ground
Continuity
Connector
Terminal
M107
122
Not existed
ECM
Ground
Continuity
Connector
Terminal
M160
110
Not existed
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