Infiniti QX56 (Z62). Manual — part 277
DAS
C1A13 STOP LAMP RELAY
DAS-145
< DTC/CIRCUIT DIAGNOSIS >
[DCA]
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Is the inspection result normal?
YES
>> GO TO 21.
NO
>> GO TO 17.
17.
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 18.
NO
>> Adjust stop lamp switch installation. Refer to
BR-7, "Inspection and Adjustment"
.
18.
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 19.
NO
>> Replace stop lamp switch.
19.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1.
Connect stop lamp switch connector.
2.
Check the voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 20.
NO
>> Repair or replace stop lamp switch power supply circuit.
20.
CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1.
Turn the ignition switch OFF.
2.
Disconnect stop lamp switch, ABS actuator and electric unit (control unit) connectors.
3.
Check for continuity between the stop lamp switch harness connector and the ABS actuator and electric
unit (control unit) harness connector.
4.
Check for continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 21.
NO
>> Repair the harnesses or connectors.
21.
PERFORM SELF-DIAGNOSIS OF ECM
1.
Connect all connectors again if the connectors are disconnected.
Terminal
Voltage
(Approx.)
(+)
(–)
Stop lamp switch
Ground
Connector
Terminal
E115
3
Battery
voltage
Stop lamp switch
ABS actuator and electric
unit (control unit)
Continuity
Connector
Terminal
Connector
Terminal
E115
4
E36
17
Existed
Stop lamp switch
Ground
Continuity
Connector
Terminal
E115
4
Not existed
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 “ENGINE”. Refer to
.
Is any DTC detected?
YES
>> Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO
>> GO TO 22.
22.
PERFORM SELF-DIAGNOSIS OF ABS ACTUATOR 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
Is any DTC detected?
YES
>> Repair or replace the malfunctioning parts identified by the self-diagnosis result.
NO
>> Replace ADAS control unit. Refer to
DAS-63, "Removal and Installation"
Component Inspection
INFOID:0000000006228078
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
3
5
When the battery voltage is applied
Existed
When the battery voltage is not ap-
plied
Not exist-
ed
JSOIA0075GB
DAS
C1A14 ECM
DAS-147
< DTC/CIRCUIT DIAGNOSIS >
[DCA]
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C1A14 ECM
DTC Logic
INFOID:0000000006228079
DTC DETECTION LOGIC
NOTE:
If DTC “C1A14” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
"ADAS CONTROL UNIT : DTC Logic"
.
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Operate the ICC system and drive.
CAUTION:
Always drive safely.
3.
Stop the vehicle.
4.
Perform “All DTC Reading” with CONSULT-III.
5.
Check if the “C1A14” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is “C1A14” detected as the current malfunction?
YES
>> Refer to
DAS-147, "Diagnosis Procedure"
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006228080
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A14” in “Self Diagnostic Result” of “ICC/ADAS”.
Is “U1000” detected?
YES
>> Perform the CAN communication system inspection. Repair or replace the malfunctioning parts.
DAS-182, "ADAS CONTROL UNIT : DTC Logic"
.
NO
>> GO TO 2.
2.
PERFORM SELF-DIAGNOSIS OF ECM
Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”.
Is any DTC detected?
YES
>> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
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
C1A14
(14)
ECM CIRCUIT
If ECM is malfunctioning
• Accelerator pedal position sensor
• ECM
• ADAS control unit
DAS-148
< DTC/CIRCUIT DIAGNOSIS >
[DCA]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
Description
INFOID:0000000006228081
ADAS control unit judges the gear position based on the following signals.
• Current gear position signal transmitted 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 Logic
INFOID:0000000006228082
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
DAS-182, "ADAS CONTROL UNIT : DTC Logic"
• Refer to
• Refer to
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start the engine.
2.
Turn the DCA 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 malfunction in the “Self Diagnostic Result” of “ICC/ADAS”.
Is “C1A15” detected as the current malfunction?
YES
>> Refer to
DAS-148, "Diagnosis Procedure"
NO
>> Refer to
GI-40, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000006228083
1.
CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A03”, “C1A04”, or “U1000” is detected other 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
NO
>> GO TO 2.
2.
CHECK VEHICLE SPEED SIGNAL
Check that “VHCL SPEED SE” operates normally 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
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