2011 INFINITI QX56 Factory Service Manual

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Page 833 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS-98
< DTC/CIRCUIT DIAGNOSIS >[ICC]
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. Chec

CCS-98
< DTC/CIRCUIT DIAGNOSIS >[ICC]
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 CCS-93, "
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 CCS-102, "
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 834 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS
C1A13 STOP LAMP RELAYCCS-99
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
YES >> GO TO 9.
NO >> Replace ICC brake hold relay.
9.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all conne

Page 835 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS-100
< DTC/CIRCUIT DIAGNOSIS >[ICC]
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 836 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS
C1A13 STOP LAMP RELAYCCS-101
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
Is the inspection result normal?
YES >> GO TO 21.
NO >> GO TO 17.
17.CHECK STOP LAMP SWITCH INSTALLATION

Page 837 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS-102
< DTC/CIRCUIT DIAGNOSIS >[ICC]
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 838 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS
C1A14 ECMCCS-103
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A14 ECM
DTC LogicINFOID:0000000006224326
DTC DETECTION LOGIC
NOTE:
If DTC “C1A14” is detected along with DTC �

Page 839 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS-104
< DTC/CIRCUIT DIAGNOSIS >[ICC]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
DescriptionINFOID:0000000006224328
ADAS control unit judges the gear pos
ition based on the following signals.
Curren

CCS-104
< DTC/CIRCUIT DIAGNOSIS >[ICC]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
DescriptionINFOID:0000000006224328
ADAS control unit judges the gear pos
ition based on the following signals.
Current gear position signal transmitt ed from TCM via CAN communication.
Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit
(control unit) via CAN communication.
DTC LogicINFOID:0000000006224329
DTC DETECTION LOGIC
NOTE:
If DTC “C1A15” is detected along with DTC “U1000”, “C1A03”, or “C1A04”, first diagnose the DTC “U1000”,
“C1A03”, or “C1A04”.
Refer to CCS-145, "
ADAS CONTROL UNIT : DTC Logic" for DTC “U1000”.
Refer to CCS-87, "
DTC Logic" for DTC “C1A03”.
Refer to CCS-89, "
DTC Logic" for DTC “C1A04”.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the MAIN switch of ICC system ON.
3. Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more.
CAUTION:
Always drive safely.
4. Stop the vehicle.
5. Perform “All DTC Reading” with CONSULT-III.
6. Check if “C1A15” is detected as the current malf unction in the “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A15” detected as the current malfunction?
YES >> Refer to CCS-104, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224330
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A03”, “C1A04”, or “U1000” is detected ot her than “C1A15” in “Self Diagnostic Result” of “ICC/
ADAS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
CCS-50, "
DTC Index".
NO >> GO TO 2.
2.CHECK VEHICLE SPEED SIGNAL
Check that “VHCL SPEED SE” operates norma lly in “DATA MONITOR” of “ICC/ADAS”.
CAUTION:
Be careful of the vehicle speed.
Is the inspection result normal?
DTC
(On board dis- play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A15 (15) GEAR POSITION A mismatch between an current gear posi-
tion signal transmitted from TCM via CAN
communication and a gear position calculat-
ed by the ADAS control unit continues for
approximately 11 minutes or more Input speed sensor
Vehicle speed sensor A/T (output speed
sensor)
TCM
Revision: 2010 May2011 QX56

Page 840 of 5598

INFINITI QX56 2011 Factory Service Manual
CCS
C1A15 GEAR POSITIONCCS-105
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK GEAR POSITION
Check that “GEAR” operates normally in “DATA M

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