ABS INFINITI QX56 2011 Factory Service Manual

DAS-82
< SYSTEM DESCRIPTION >[DCA]
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
Monitored item
[Unit]
ALL SIG(ICC)
MAIN SIG (ICC)
MAIN SIG
(LDW/LDP)
MAIN SIG
(BSW/BSI)
Description
MAIN SW
[On/Off] ×× × × Indicates [On/Off] status as judged from ICC steering switch signal (ECM trans-
mits ICC steering switch signal through CAN communication)
SET/COAST SW
[On/Off] ×× Indicates [On/Off] status as judged from ICC steering switch signal (ECM trans-
mits ICC steering switch signal through CAN communication)
CANCEL SW
[On/Off] ××
Indicates [On/Off] status as judged from ICC steering switch signal (ECM trans-
mits ICC steering switch signal through CAN communication)
RESUME/ACC SW
[On/Off] ×× Indicates [On/Off] status as judged from ICC steering switch signal (ECM trans-
mits ICC steering switch signal through CAN communication)
DISTANCE SW
[On/Off] × Indicates [On/Off] status as judged from ICC steering switch signal (ECM trans-
mits ICC steering switch signal through CAN communication)
CRUISE OPE
[On/Off] ××
Indicates whether controlling or not (ON means “controlling”)
BRAKE SW
[On/Off] ×× × × Indicates [On/Off] status as judged from ICC brake switch signal (ECM transmits
ICC brake switch signal through CAN communication)
STOP LAMP SW
[On/Off] ×× × × Indicates [On/Off] status as judged from stop lamp switch signal (ECM transmits
stop lamp switch signal through CAN communication)
IDLE SW
[On/Off] ×
Indicates [On/Off] status of idle switch read from ADAS control unit through CAN
communication (ECM transmits On/Off status through CAN communication)
SET DISTANCE
[Short/Mid/Long] ××
Indicates set distance memorized in ADAS control unit
CRUISE LAMP
[On/Off] ××
Indicates [On/Off] status of MAIN switch indicator output
OWN VHCL
[On/Off] ×
Indicates [On/Off] status of own vehicle indicator output
VHCL AHEAD
[On/Off] ×
Indicates [On/Off] status of vehicle ahead detection indicator output
ICC WARNING
[On/Off] ×
Indicates [On/Off] status of ICC system warning lamp output
VHCL SPEED SE
[km/h] or [mph] ×× × × Indicates vehicle speed calculated from ADAS control unit through CAN commu-
nication [ABS actuator and electric unit (c
ontrol unit) transmits vehicle speed sig-
nal (wheel speed) through CAN communication]
SET VHCL SPD
[km/h] or [mph] ××
Indicates set vehicle speed memorized in ADAS control unit
BUZZER O/P
[On/Off] ×
Indicates [On/Off] status of ICC warning chime output
THRTL SENSOR
[deg] ××
NOTE:
The item is displayed, but it is not monitored
ENGINE RPM
[rpm] × Indicates engine speed read from ADAS control unit through CAN communication
(ECM transmits engine speed signal through CAN communication)
WIPER SW
[OFF/LOW/HIGH] × Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front wiper request sig-
nal through CAN communication)
YAW R AT E
[deg/s] ×
NOTE:
The item is displayed, but it is not monitored
BA WARNING
[On/Off] ×
Indicates [On/Off] status of IBA OFF indicator lamp output
STP LMP DRIVE
[On/Off] ××
Indicates [On/Off] status of ICC brake hold relay drive output
D RANGE SW
[On/Off] × Indicates [On/Off] status of “D” or “M” positions read from ADAS control unit
through CAN communication; ON when position “D” or “M” (TCM transmits shift
position signal through CAN communication).
Revision: 2010 May2011 QX56

DAS-84
< SYSTEM DESCRIPTION >[DCA]
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
LDP SYSTEM ON
[On/Off]×
Indicates [On/Off] status of LDP system
WARN REQ
[On/Off] ×
Indicates an ADAS control unit judged warning state (ON/OFF) of LDP system
READY signal
[On/Off] ×
Indicates LDP system settings
Camera lost
[Detect/Deviate/Both] ××Indicates a lane marker detection state judged from a lane marker detection signal
read by the ADAS control unit via ITS communication
(Lane camera unit transmits a lane marker signal via ITS communication)
Shift position
[Off, P, R, N, D, M/T1 -
7] ××
Indicates shift position read from ADAS control unit through CAN communication
(TCM transmits shift position signal through CAN communication)
Turn signal
[OFF/LH/RH/LH&RH] ××Indicates turn signal operation status read from ADAS control unit through CAN
communication (BCM transmits turn indicator signal through CAN communica-
tion)
SIDE G
[G] ××Indicates lateral G acting on the vehicle. This lateral G is judged from a side G
sensor signal read by ADAS control unit via CAN communication
(The ABS actuator and electric unit (control unit) transmits a side G sensor signal
via CAN communication)
STATUS signal
[Stnby/Warn/Cancl/
Off] ×
Indicates a control state of LDP system
Lane unclear
[On/Off] ××Indicates an ON/OFF state of the lane marker. The ON/OFF state is judged from
a detected lane condition signal read by the ADAS control unit via ITS communi-
cation
(The lane camera unit transmits a detected lane condition signal via ITS commu-
nication)
FUNC ITEM
[FUNC1] ×× × × Indicates systems which can be set to ON/OFF by selecting “Driver Assistance”
⇒
“Dynamic Assistance Settings” of the navigation system
FUNC1: Distance Control Assist (DCA), Lane Departure Prevention (LDP)
FUNC ITEM (NV-ICC)
[Off] ×× × × NOTE:
The item is displayed, but it is not monitored
FUNC ITEM (NV-
DCA)
[Off] ×× × ×
NOTE:
The item is displayed, but it is not monitored
DCA SELECT
[On/Off] ×× × × Indicates an ON/OFF state of the DCA system. The DCA system can be set to
ON/OFF by selecting
“Driver Assistance” ⇒ “Dynamic Assistance Settings” of the
navigation system
LDP SELECT
[On/Off] ×× × × Indicates an ON/OFF state of LDP system. LDP system can be set to ON/OFF by
selecting “Driver Assistance”
⇒ “Dynamic Assistance Settings” of the navigation
system
BSI SELECT
[On/Off] ×× × × NOTE:
The item is displayed, but it is not monitored
NAVI ICC SELECT
[Off] ×× × × NOTE:
The item is displayed, but it is not monitored
NAVI DCA SELECT
[Off] ×× × ×
NOTE:
The item is displayed, but it is not monitored
SYS SELECTABILITY
[On/Off] ×× × × Indicates the availability of ON/OFF switching for “Driver Assistance” items re-
ceived from the AV control unit via CAN communication
WARN SYS SW
[On/Off] ×× × ×
Indicates [On/Off] status of warning systems switch
BSW/BSI WARN LMP
[On/Off] ×
Indicates [On/Off] status of BSW warning lamp output
Monitored item
[Unit]
ALL SIG
(ICC)
MAIN SIG (ICC)
MAIN SIG
(LDW/LDP)
MAIN SIG
(BSW/BSI)
Description
Revision: 2010 May2011 QX56

DAS-86
< SYSTEM DESCRIPTION >[DCA]
DIAGNOSIS SYSTEM (ADAS CONTROL UNIT)
STOP LAMP
ICC BUZZER
BRAKE ACTUATOR
NOTE:
The test can be performed only when the engine is running.
NOTE:
The test is finished in 10 seconds after starting
Te s t i t e mOper-
ation Description  MAIN switch indicator
 ICC system warning lamp
 IBA OFF indicator lamp
METER LAMP Off
Stops sending the following signals to exit from the test
 Meter display signal
 ICC warning lamp signal
 IBA OFF indicator lamp signal OFF
On Transmits the following signals to the combination meter via
CAN communication
 Meter display signal
 ICC warning lamp signal
 IBA OFF indicator lamp signal
ON
Te s t i t e m
Oper-
ation Description Stop lamp
STOP LAMP Off
Stops transmitting the ICC brake hold relay drive signal be-
low to end the test OFF
On Transmits the ICC brake hold relay drive signal ON
Test item Operation Description ICC warning chime operation
sound
ICC BUZZER MODE1
Transmits the buzzer output signals to the combination
meter via CAN communication Intermittent beep sound
Test start Starts the tests of “MODE1” — Reset Stops transmitting the buzzer output signal below to end
the test —
End Returns to the “SELECT TEST ITEM” screen —
Test item Operation Description “PRESS SENS” value
BRAKE ACTUATOR MODE1
Transmits the brake fluid pressure control signal to the
ABS actuator and electric unit (control unit) via CAN
communication 10 bar
MODE2 20 bar
MODE3 30 bar
Test start Starts the tests of “MODE1”, “MODE2” and “MODE3” —
Reset Stops transmitting the brake fluid pressure control signal
below to end the test —
End Returns to the “SELECT TEST ITEM” screen —
PKIB1767J
Revision: 2010 May2011 QX56

DAS
DIAGNOSIS SYSTEM (ICC SENSOR)DAS-89
< SYSTEM DESCRIPTION > [DCA]
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DIAGNOSIS SYSTEM (ICC SENSOR)
CONSULT-III Function (LASER)INFOID:0000000006228055
APPLICATION ITEMS
CONSULT-III performs the following functions via CAN communication with ADAS control unit and the com-
munication with ICC sensor.
WORK SUPPORT
Laser Beam Adjust
Refer to CCS-72, "Description".
SELF DIAGNOSTIC RESULT
Refer to CCS-55, "DTC Index".
DATA MONITOR
Diagnosis mode Description
Work Support It can monitor the adjustment direction indication in order to perform the laser beam aiming operation
smoothly
Self Diagnostic Result Displays malfunctioning system memorized in ICC sensor
Data Monitor Displays real-time input/output data of ICC sensor
Ecu Identification Displays ICC sensor part number
CAN Diag Support Monitor The results of transmit/receive diagnosis of ITS communication can be read
Work support items Description
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction
Monitored item
[Unit] Description
VHCL SPEED SE
[km/h] or [mph] Vehicle speed judged from a vehicle speed signal read by the ICC sensor via ITS communica-
tion is displayed [ADAS control unit receives a vehicle speed signal from ABS actuator and
electric unit (control unit) via CAN communication and transmits the calculated vehicle speed
to ICC sensor via ITS communication]
YAW R AT E
[deg/s] Indicates yaw rate read from ADAS control unit through ITS communication (ADAS control unit
receives yaw rate signal from ABS actuator and electric unit (control unit) via CAN communi-
cation and transmits yaw rate calculated by the ADAS control unit)
Yaw rate judged from a yaw rate signal read by ICC sensor via ITS communication is displayed
[ADAS control unit receives a yaw
rate signal from ABS actuator and electric unit (control unit)
via CAN communication and transmits the calculated yaw rate to ICC sensor via ITS commu-
nication]
PWR SUP MONI
[V] Indicates IGN voltage input by ICC sensor
DISTANCE
[m] Indicates the distance from the vehicle ahead
RELATIVE SPD
[m/s] Indicates the relative speed of the vehicle ahead
LASER OFFSET
[m] NOTE:
The item is indicated, but not used
LASER HEIGHT
[m] NOTE:
The item is indicated, but not used
STEERING ANGLE
[deg] The steering angle is displayed
STRG ANGLE SPEED
[deg/s] The steering angle speed is displayed
Revision: 2010 May2011 QX56

DAS-100
< ECU DIAGNOSIS INFORMATION >[DCA]
ADAS CONTROL UNIT
DTC Index
INFOID:0000000006223513
NOTE:
 The details of time display are as per the following.
4  C1A01: POWER SUPPLY CIR
 C1A02: POWER SUPPLY CIR 2
 C1A04: ABS/TCS/VDC CIRC
 C1A05: BRAKE SW/STOP L SW
 C1A06: OPERATION SW CIRC
 C1A12: LASER BEAM OFFCNTR
 C1A13: STOP LAMP RLY FIX
 C1A14: ECM CIRCUIT
 C1A16: RADAR STAIN
 C1A18: LASER AIMING INCMP
 C1A2A: ICC SEN PWR SUP CIR
 C1A21: ICC SENSOR HIGH TEMP
 C1A24: NP RANGE
 C1A26: ECD MODE MALF
 C1A27: ECD PWR SUPLY CIR
 C1A33: CAN TRANSMISSION ERR
 C1A34: COMMAND ERROR
 C1A35: APA CIR
 C1A36: APA CAN COMM CIR
 C1A37: APA CAN CIR 2
 C1A38: APA CAN CIR 1
 C1A39: STRG SEN CIR
 C1A40: SYSTEM SW CIRC
 C1B01: CAM AIMING INCMP
 C1B03: CAM ABNRML TMP DETCT
 C1F01: APA MOTOR MALF
 C1F05: APA PWR SUPLY CIR
 U0121: VDC CAN CIR 2
 U0126: STRG SEN CAN CIR 1
 U0235: ICC SENSOR CAN CIRC 1
 U0401: ECM CAN CIR 1
 U0402: TCM CAN CIR 1
 U0415: VDC CAN CIR 1
 U0428: STRG SEN CAN CIR 2
 U1500: CAM CAN CIR 2
 U1501: CAM CAN CIR 1
 U1502: ICC SEN CAN COMM CIR
 U1503: SIDE RDR L CAN CIR 2
 U1504: SIDE RDR L CAN CIR 1
 U1505: SIDE RDR R CAN CIR 2
 U1506: SIDE RDR R CAN CIR 1
 U150B: ECM CAN CIRC 3
 U150C: VDC CAN CIRC 3
 U150D: TCM CAN CIRC 3
 U150E: BCM CAN CIRC 3
 U150F: AV CAN CIRC 3
 U1512: HVAC CAN CIRC3
 U1513: METER CAN CIRC 3
 U1514: STRG SEN CAN CIRC 3
 U1515: ICC SENSOR CAN CIRC 3
 U1516: CAM CAN CIRC 3
 U1517: APA CAN CIRC 3
 U1518: SIDE RDR L CAN CIRC 3
 U1519: SIDE RDR R CAN CIRC 3
 U1520: 4WD CAN CIRC 3
5  C1A03: VHCL SPEED SE CIRC
6  C1A15: GEAR POSITION
7  C1A00: CONTROL UNIT
Priority Detected items (DTC)
Revision: 2010 May2011 QX56

DAS
ADAS CONTROL UNITDAS-101
< ECU DIAGNOSIS INFORMATION > [DCA]
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- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
 IGN counter is displayed on FFD (Freeze Frame Data).
- 0: The malfunctions that are detected now CAN communication system (U1000, U1010)
- 1 - 39: It increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 39, it is fixed to 39 unt il the self-diagnosis results are erased.
Other than CAN communication s ystem (Other than U1000, U1010)
- 1 - 49: It increases like 0 → 1 → 2 ··· 38 → 49 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 49, it is fixed to 49 unt il the self-diagnosis results are erased.
Systems for fail-safe
 A: Vehicle-to-vehicle distance control mode
 B: Conventional (fixed speed) cruise control mode
 C: Intelligent Brake Assist (IBA)
 D: Forward Collision Warning (FCW)
 E: Distance Control Assist (DCA)
 F: Lane Departure Warning (LDW)/Lane Departure Prevention (LDP)
 G: Blind Spot Warning (BSW)
DTC
CONSULT-III display Warning lamp Fail-safe
Reference
CONSULT-III On board
display
ICC system warning lamp
IBA OFF indicator lamp
Lane departure warning lamp BSW warning lamp
System
C1A00 0 CONTROL UNIT ON ON ON ON A, B, C, D, E, F, G DAS-129
C1A01 1 POWER SUPPLY CIR ON ON ON ON A, B, C, D, E, F, GDAS-130
C1A02 2 POWER SUPPLY CIR 2 ON ON ON ON A, B, C, D, E, F, GDAS-130
C1A03 3 VHCL SPEED SE CIRC ON ON ON ON A, B, C, D, E, F, GDAS-131
C1A04 4 ABS/TCS/VDC CIRC ON ON ON A, B, C, D, E, FDAS-133
C1A05 5 BRAKE SW/STOP L SW ON ON ON A, B, C, D, E, FDAS-134
C1A06 6 OPERATION SW CIRC ON ON A, B, E, FDAS-138
C1A12 12LASER BEAM OFFCN-
TR ON ON A, C, D, E
DAS-140
C1A13 13 STOP LAMP RLY FIX ON ON A, B, C, D, E DAS-141
C1A14 14 ECM CIRCUIT ON ON A, B, E, FDAS-147
C1A15 15 GEAR POSITION ON ON ON ON A, B, C, D, E, F, GDAS-148
C1A16 16 RADAR STAIN ON ON A, C, D, EDAS-150
C1A17 17 ICC SENSOR MALF ON ON A, B, C, D, EDAS-151
C1A18 18 LASER AIMING INCMP ON ON A, C, D, EDAS-152
C1A21 21ICC SENSOR HIGH
TEMP ON ON A, B, C, D, E
DAS-153
C1A24 24 NP RANGE ON ON ON ON A, B, C, D, E, F, G DAS-154
C1A26 26 ECD MODE MALF ON ON A, B, C, D, EDAS-156
C1A27 27 ECD PWR SUPLY CIR ON ON A, B, C, D, EDAS-157
C1A33 33CAN TRANSMISSION
ERR ON A, B, E
DAS-159
Revision: 2010 May2011 QX56

DAS
C1A03 VEHICLE SPEED SENSORDAS-131
< DTC/CIRCUIT DIAGNOSIS > [DCA]
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C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006228063
DTC DETECTION LOGIC
NOTE:
If DTC “C1A03” is detected along with DTC “U1000” or “C1A04”, first diagnose the DTC “U1000” or “C1A04”.
 Refer to DAS-182, "
ADAS CONTROL UNIT : DTC Logic" for DTC “U1000”.
 Refer to DAS-133, "
DTC Logic" for DTC “C1A04”.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the DCA system ON.
3. Drive the vehicle at 30 km/h (19 MPH) or more. CAUTION:
Always drive safely.
4. Stop the vehicle.
5. Perform “All DTC Readi ng” with CONSULT-III.
6. Check if the “C1A03” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A03” detected as the current malfunction?
YES >> Refer to DAS-131, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228064
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A04” or “U1000” is detected other than “C1A03” 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
DAS-100, "
DTC Index".
NO >> GO TO 2.
2.CHECK DATA MONITOR
1. Start the engine.
2. Drive the vehicle.
3. Check that the value of “VHCL SPD AT” is almost the same as the value of “VHCL SPEED SE” in “DATA
MONITOR” of “ICC/ADAS”.
CAUTION:
Be careful of the vehicle speed.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> GO TO 3.
3.CHECK TCM SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Reading”.
2. Check if any DTC is detected in “Sel f Diagnostic Result” of “TRANSMISSION”.
DTC
(On board
display) Trouble diagnosis
name DTC detecting condition Possible causes
C1A03 (3) VHCL SPEED SE
CIRC If the vehicle speed signal (wheel speed) from
ABS actuator and electric unit (control unit) and
the A/T vehicle speed sensor signal (output
shaft revolution signal) from TCM, received by
the ADAS control unit via CAN communication,
are inconsistent  Wheel speed sensor
 ABS actuator and electric unit (control
unit)
 Vehicle speed sensor A/T (output speed sensor)
TCM
 ADAS control unit
Revision: 2010 May2011 QX56

DAS-132
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A03 VEHICLE SPEED SENSOR
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair
or replace the malfunctioning parts. Refer to
TM-78, "
DTC Index".
NO >> GO TO 4.
4.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
BRC-51, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
Revision: 2010 May2011 QX56

DAS
C1A04 ABS/TCS/VDC SYSTEM
DAS-133
< DTC/CIRCUIT DIAGNOSIS > [DCA]
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C1A04 ABS/TCS/VDC SYSTEM
DTC LogicINFOID:0000000006228065
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-182,
"ADAS CONTROL UNIT : DTC Logic".
Diagnosis ProcedureINFOID:0000000006228066
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if the “U1000” is detect ed other than “C1A04” 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 ABS ACTUATOR AND ELECTRIC UNIT (C ONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
BRC-51, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A04 (4) ABS/TCS/VDC CIRC
If a malfunction occurs in the VDC/TCS/ABS
system ABS actuator and electric unit (control
unit)
Revision: 2010 May2011 QX56

DAS-134
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A05 BRAKE SW/STOP LAMP SW
C1A05 BRAKE SW/STOP LAMP SW
DTC LogicINFOID:0000000006228067
DTC DETECTION LOGIC
NOTE:
If DTC “C1A05” is detected along with DTC “U
1000”, first diagnose the DTC “U1000”. Refer to DAS-182,
"ADAS CONTROL UNIT : DTC Logic".
Diagnosis ProcedureINFOID:0000000006228068
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the “U1000” is detected other than “C1A 05” in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> Perform the CAN communication system inspecti on. Repair or replace the malfunctioning parts.
Refer to DAS-182, "
ADAS CONTROL UNIT : DTC Logic".
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/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 norma lly 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-137, "
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