2011 INFINITI QX56 Factory Service Manual

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Page 1105 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-140
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A12 LASER BEAM OFF CENTER
C1A12 LASER BEAM OFF CENTER
DTC LogicINFOID:0000000006228074
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000006228075
1.CHECK

Page 1106 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A13 STOP LAMP RELAYDAS-141
< DTC/CIRCUIT DIAGNOSIS > [DCA]
C
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G H
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C1A13 STOP LAMP RELAY
DTC LogicINFOID:0000000006228076
DTC DETECTION LOGIC
NOTE:
If DTC “C1A13” is d

DAS
C1A13 STOP LAMP RELAYDAS-141
< DTC/CIRCUIT DIAGNOSIS > [DCA]
C
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C1A13 STOP LAMP RELAY
DTC LogicINFOID:0000000006228076
DTC DETECTION LOGIC
NOTE:
If DTC “C1A13” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-182,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE (1)
1. Start the engine.
2. Perform the active test item “STOP LAMP” with CONSULT-III.
3. Perform “All DTC Reading”.
4. Check if the “C1A13” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A13” detected as the current malfunction?
YES >> Refer to DAS-141, "Diagnosis Procedure".
NO >> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE (2)
1. Drive at the vehicle speed of 40 km/h (25 MPH) or more for approximately 60 seconds or more without the
brake pedal depressed.
CAUTION:
Always drive safely.
NOTE:
If it is outside the above condition, repeat step 1.
2. Perform “All DTC Reading”.
3. Check if the “C1A13” is detected as the current malfunction in the “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A13” detected as the current malfunction?
YES >> Refer to DAS-141, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228077
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A13” in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> Perform the CAN communicati on system inspection. Repair or replace the malfunctioning parts.
Refer to DAS-182, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK STOP LAMP SWITCH
Check that “STOP LAMP SW” operate normally in “DATA MONITOR” of “ICC/ADAS”.
DTC
(On board dis-
play) Trouble diagnosis name DTC detecting condition Possible causes
C1A13 (13) STOP LAMP RLY FIX Stop lamp inactive state continues for 0.3
seconds or more despite the outputting of
an ICC sensor ICC brake hold relay drive
signal
The stop lamp remains ON for 60 seconds or more under the following conditions:
- Driving at 40 km/h or more
- No stop lamp drive signal output from ICC
sensor
- No brake operation Stop lamp switch circuit
ICC brake switch circuit
ICC brake hold relay circuit
Stop lamp switch
ICC brake switch
ICC brake hold relay
Incorrect stop lamp switch installation
Incorrect ICC brake switch installation
ECM
ABS actuator and elec
tric unit (control
unit)
Revision: 2010 May2011 QX56

Page 1107 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-142
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A13 STOP LAMP RELAY
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 3.
3.CHECK STOP LAMP SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Che

DAS-142
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A13 STOP LAMP RELAY
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 3.
3.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 4.
NO >> Adjust stop lamp switch installation. Refer to BR-7, "
Inspection and Adjustment".
4.CHECK STOP LAMP SWITCH
1. Disconnect stop lamp switch connector.
2. Check stop lamp switch. Refer to DAS-137, "
Component Inspection (Stop Lamp Switch)".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace stop lamp switch.
5.CHECK STOP LAMP FOR ILLUMINATION
1. Turn the ignition switch OFF.
2. Check that the stop lamp is illuminated by depressing the brake pedal to turn the stop lamp ON.
3. Remove ICC brake hold relay.
Is the inspection result normal?
YES >> GO TO6.
NO >> Check the stop lamp circuit, and repair or replace the malfunctioning parts.
6.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ECM
1. Turn the ignition switch OFF.
2. Disconnect stop lamp switch, ECM, rear combination lamp, and high-mounted stop lamp connectors.
3. Check for continuity between the stop lamp s witch harness connector and the ECM harness connector.
4. Check for continuity between stop la mp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair the harnesses or connectors.
7.CHECK ICC BRAKE HOLD RELAY CIRCUIT
1. Connect ICC brake hold relay.
2. Disconnect the stop lamp switch connector.
3. Check that the stop lamp does not illuminate when brake pedal is not depressed.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK ICC BRAKE HOLD RELAY
1. Remove ICC brake hold relay
2. Check ICC hold relay. Refer to DAS-146, "
Component Inspection".
Is the inspection result normal?
Stop lamp switch ECM Continuity
Connector Terminal Connector Terminal
E115 2 E80 158 Existed
Stop lamp switch GroundContinuity
Connector Terminal
E115 2 Not existed
Revision: 2010 May2011 QX56

Page 1108 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A13 STOP LAMP RELAYDAS-143
< DTC/CIRCUIT DIAGNOSIS > [DCA]
C
D
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G H
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N P A
YES >> GO TO 9.
NO >> Replace ICC brake hold relay.
9.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all conn

Page 1109 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-144
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A13 STOP LAMP RELAY
Is the inspection result normal?
YES >> GO TO 13.
NO >> Replace ADAS control unit. Refer to
DAS-63, "
Removal and Installation".
13.CHECK

Page 1110 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A13 STOP LAMP RELAYDAS-145
< DTC/CIRCUIT DIAGNOSIS > [DCA]
C
D
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N P A
Is the inspection result normal?
YES >> GO TO 21.
NO >> GO TO 17.
17.CHECK STOP LAMP SWITCH INSTALLATION

Page 1111 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-146
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A13 STOP LAMP RELAY
2. Turn ignition switch ON.
3. Perform “All DTC Reading”.
4. Check if any DTC is detected in “Self Diagnostic Result” of “ENGIN

Page 1112 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A14 ECMDAS-147
< DTC/CIRCUIT DIAGNOSIS > [DCA]
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C1A14 ECM
DTC LogicINFOID:0000000006228079
DTC DETECTION LOGIC
NOTE:
If DTC “C1A14” is detected along with DTC �

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