2011 INFINITI QX56 brake

CCS
C1A05 BRAKE SW/STOP LAMP SWCCS-93
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
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 EC-98, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s 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 BRC-51, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s 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:0000000006224314
1.CHECK ICC BRAKE SWITCH
Check for continuity between I CC brake switch terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ICC brake switch.
Component Inspection (Stop Lamp Switch)INFOID:0000000006224315
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
12 When brake pedal is depressed
Not exist-
ed
When brake pedal is released Existed
Terminal Condition Continuity
12 When brake pedal is depressed Existed
When brake pedal is released
Not exist-
ed
34 When brake pedal is depressed Existed
When brake pedal is released
Not exist-
ed
Revision: 2010 May2011 QX56

CCS
C1A13 STOP LAMP RELAYCCS-97
< DTC/CIRCUIT DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A13 STOP LAMP RELAY
DTC LogicINFOID:0000000006224323
DTC DETECTION LOGIC
NOTE:
If DTC “C1A13” is detected along with DTC “U 1000”, first diagnose the DTC “U1000”. Refer to CCS-145,
"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 CCS-97, "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 CCS-97, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224324
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 CCS-145, "
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

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

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 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 EC-98, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> Replace ADAS control unit. Refer to DAS-63, "
Removal and Installation".
10.CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Remove ICC brake hold relay.
3. Check the voltage between ICC brake hold relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace ICC brake hold relay power supply circuit.
11 .CHECK HARNESS BETWEEN AND ICC BRAKE HOLD RELAY AND ADAS CONTROL UNIT
1. Disconnect ADAS control unit connectors.
2. Check for continuity between ICC brake hold re lay harness connector and ADAS control unit harness
connector.
3. Check for continuity between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair the harnesses or connectors.
12.CHECK ADAS CONTROL UNIT STANDARD VOLTAGE
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform “STOP LAMP” on “Active Test” of “ICC/ ADAS”, and then check the voltage between ADAS con-
trol unit harness connector and ground.
Te r m i n a l
Voltag e
(Approx.)
(+) (–)
ICC brake hold relay
Ground
Connector Terminal
E64 1 Battery
voltage
ICC brake hold relay ADAS control unit Continuity
Connector Terminal Connector Terminal
E64 2 B61 5 Existed
ICC brake hold relay GroundContinuity
Connector Terminal
E64 2 Not existed
Revision: 2010 May2011 QX56

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 ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Check the voltage between ICC brake hold relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 14.
NO >> Repair or replace ICC brake hold relay power supply circuit.
14.CHECK HARNESS BETWEEN ICC BR AKE HOLD RELAY AND ECM
1. Disconnect ECM, rear combination lamp, and high- mounted stop lamp connectors and remove ICC brake
hold relay.
2. Check for continuity between ICC brake hold relay harness connector and ECM harness connector.
3. Check for continuity between ICC brake hold relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 15.
NO >> Repair the harnesses or connectors.
15.CHECK ICC BRAKE HOLD RELAY
1. Remove ICC brake hold relay.
2. Check ICC brake hold relay. Refer to CCS-102, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace ICC brake hold relay.
16.CHECK STOP LAMP SWITCH
Check that “STOP LAMP SW” operate norma lly in “DATA MONITOR” of “ABS”.
Te r m i n a l
Condition
Vo l ta g e
(Approx.)
(+) (–)
ADAS control unit
GroundActive Test
item
“STOP LAMP”
Connector Terminal
B61 5 Off
Battery
voltage
On 0 V
Te r m i n a l
Vo l ta g e
(Approx.)
(+) (–)
ICC brake hold relay
Ground
Connector Terminal
E64 3 Battery
voltage
ICC brake hold relay ECM Continuity
Connector Terminal Connector Terminal
E64 5 E80 158 Existed
ICC brake hold relay GroundContinuity
Connector Terminal
E64 5 Not existed
Revision: 2010 May2011 QX56

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 “ENGINE”. Refer to
EC-98, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> GO TO 22.
22.PERFORM SELF-DIAGNOSIS OF ABS ACTUAT OR AND ELECTRIC UNIT (CONTROL UNIT)
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 “ABS”. Refer to BRC-51, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> Replace ADAS control unit. Refer to DAS-63, "
Removal and Installation".
Component InspectionINFOID:0000000006224325
1.CHECK ICC BRAKE HOLD RELAY
Apply battery voltage to ICC brake hold relay terminals 1 and 2, and
then check for continuity under the following conditions.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ICC brake hold relay.
Terminal Condition Continuity
35 When the battery voltage is applied Existed
When the battery voltage is not ap-
plied
Not exist-
ed
JSOIA0075GB
Revision: 2010 May2011 QX56

CCS-162
< SYMPTOM DIAGNOSIS >[ICC]
ICC SYSTEM CANNOT BE SET
(MAIN SWITCH TURNS ON/OFF)
ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)
DescriptionINFOID:0000000006224443
The MAIN switch can be turned ON/OFF, but the ICC system cannot be set even if the SET/COAST switch is
pressed.
NOTE:
The system cannot be set in the following case.
 When the vehicle ahead is not detected bel ow the speed of 32 km/h (20 MPH).
 When the selector lever is not in the “D” position or manual mode.
 When the front wipers are operating at HI.
(If the vehicle is equipped with a rain sensing auto-wi per, the system may cancel when the wipers are set to
AUTO)
 When the brake pedal is depressed.
 When driving into a strong light (i.e., sunlight).
 When the VDC is turned OFF.
 When ABS or VDC (including the TCS) operates.
 When a wheel slips.
 When SNOW mode switch is turned ON.
 When ABS warning lamp is ON.
 When 4WD shift switch is not AUTO position.
Diagnosis ProcedureINFOID:0000000006224444
1.CHECK CAUSE OF AUTOMATIC CANCELLATION
Check if there is the cancellation cause in the “CAUSE OF AUTO-CANCEL” on “WORK SUPPORT” of “ICC/
ADAS” with CONSULT-III.
Is it displayed?
Not displayed>>GO TO 2.
“OPE SW VOLT CIRC”>>Refer to CCS-94, "
DTC Logic".
“VHCL SPD UNMATCH”>>Refer to CCS-87, "
DTC Logic".
“IGN LOW VOLT”>>Refer to CCS-85, "
ADAS CONTROL UNIT : DTC Logic".
“ECM CIRCUIT”>>Refer to CCS-103, "
DTC Logic".
“CAN COMM ERROR”>>Refer to CCS-145, "
ADAS CONTROL UNIT : DTC Logic".
“ICC SENSOR CAN COMM ERR”>>Refer to CCS-137, "
DTC Logic".
“ABS/TCS/VDC CIRC”>>Refer to CCS-89, "
DTC Logic".
“ECD CIRCUIT”>>Refer to CCS-115, "
DTC Logic".
2.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Reading”.
2. Check if any DTC is detected in “Self Diagnosti c Result” of “ICC/ADAS”” of “LASER”. Refer to CCS-50,
"DTC Index" (ICC/ADAS) or CCS-55, "DTC Index" (LASER).
Is any DTC detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts identified by the self-diagnosis result.
>> GO TO 6.
4.CHECK EACH SWITCH AND VEHICLE SPEED SIGNAL
1. Start the engine.
2. Check that the following items operate no rmally in “DATA MONITOR” of “ICC/ADAS”.
- “VHCL SPEED SE”
- “D RANGE SW”
- “SET/COAST SW”
- “BRAKE SW”
-“WIPER SW”
Revision: 2010 May2011 QX56

CCS
ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)
CCS-163
< SYMPTOM DIAGNOSIS > [ICC]
C
D
E
F
G H
I
J
K L
M B
N P A
- “PKB SW”
Is there a malfunctioning item?
All items are normal>>GO TO 5.
“VHCL SPEED SE”>>Refer to CCS-87, "
DTC Logic".
“D RANGE SW”>>Refer to CCS-165, "
Diagnosis Procedure".
“SET/COAST SW”>>Refer to CCS-94, "
DTC Logic".
“BRAKE SW”>>Refer to CCS-90, "
DTC Logic".
“WIPER SW” (When the front wiper operation is normal)>>GO TO 5.
“WIPER SW” (When the front wiper oper ation is malfunctioning)>>Performs the diagnosis of the front wiper.
Refer to WW-49, "
Symptom Table".
“PKB SW”>>Refer to WCS-43, "
Diagnosis Procedure".
5.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 6.
6.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56