2011 INFINITI QX56 Factory Service Manual

engine oil capacity remove seats dead battery open trunk fuse box location OBD port torque

Page 1313 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-348
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A04 ABS/TCS/VDC SYSTEM
C1A04 ABS/TCS/VDC SYSTEM
DTC LogicINFOID:0000000006228186
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC

Page 1314 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-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 LogicINFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DT

DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-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 LogicINFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DTC “C1A05” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-374,
"ADAS CONTROL UNIT : DTC Logic".
Diagnosis ProcedureINFOID:0000000006228189
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if the “U1000” is detect ed other than “C1A05” 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-374, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK STOP LAMP SWIT CH 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 no rmally 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)
Revision: 2010 May2011 QX56

Page 1315 of 5598

INFINITI QX56 2011 Factory Service Manual
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.

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 s witch harness connector and ECM harness connector.
4. Check for continuity between ICC br ake 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 EC-98, "
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".
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.
Te r m i n a l s
Voltag e
(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 GroundContinuity
Connector Terminal
E68 2 Not existed
Revision: 2010 May2011 QX56

Page 1316 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-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

Page 1317 of 5598

INFINITI QX56 2011 Factory Service Manual
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

Page 1318 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A06 OPERATION SWDAS-353
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A06 OPERATION SW
DTC LogicINFOID:0000000006228192
DTC DETECTION LOGIC
NOTE:
If DTC “C1A06” is d

DAS
C1A06 OPERATION SWDAS-353
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A06 OPERATION SW
DTC LogicINFOID:0000000006228192
DTC DETECTION LOGIC
NOTE:
If DTC “C1A06” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-374,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Wait for approximately 5 minutes after turning the LDP system ON.
3. Perform “All DTC Readi ng” with CONSULT-III.
4. Check if the “C1A06” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A06” detected as the current malfunction?
YES >> Refer to DAS-353, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228193
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A06” 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-374, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK ICC STEERING SWITCH
1. Turn the ignition switch OFF.
2. Disconnect the ICC steering switch connector.
3. Check the ICC steering switch. Refer to DAS-354, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the steering wheel.
3.CHECK HARNESS BETWEEN SP IRAL CABLE AND ECM
1. Disconnect the ECM connector.
2. Check for continuity between the spiral cable harness connector and ECM harness connector.
3. Check for continuity between spiral cable harness connector and ground.
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A06 (6) OPERATION SW
CIRC Any switch of the ICC steering switch is de-
tected as “ON” continuously for 60 seconds
An ON/OFF state judgment of the ICC differs
between ECM and ADAS control unit, and the
state continues for 2 seconds or more ICC steering switch circuit
ICC steering switch
ECM
Spiral cable ECM
Continuity
Connector Terminal Connector Terminal
M33 25
E80 128
Existed
32 130
Revision: 2010 May2011 QX56

Page 1319 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-354
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A06 OPERATION SW
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK SPIRAL CABLE
Check for continuity be

Page 1320 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A14 ECMDAS-355
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A14 ECM
DTC LogicINFOID:0000000006228195
DTC DETECTION LOGIC
NOTE:
If DTC “C1A14” is detected along with

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