DTC C0089:64 [DSC HU/CM]

id040262906500

DTC
C0089:64
2WD
•  TCS OFF switch
4WD
•  Off-Road Traction Assist switch
DETECTION CONDITION
•  Continuous ON signal from the TCS OFF switch (2WD)/Off-Road Traction Assist switch (4WD) for 10 s or more is detected.
FAIL-SAFE FUNCTION
Refer to “Fail-safe function table”. (See DTC TABLE [DSC HU/CM].)
POSSIBLE CAUSE
•  The driver pressed and held the TCS OFF switch (2WD)/Off-Road Traction Assist switch (4WD) for 10 s or more.
•  Short to ground in the wiring harness between the instrument cluster terminal 1V and cluster switch terminal B
•  Open circuit in wiring harness between cluster switch terminal C and body ground
•  TCS OFF switch (2WD)/Off-Road Traction Assist switch (4WD) malfunction
•  Poor connection at connectors (female terminal)

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT FOR INSTRUMENT CLUSTER MALFUNCTION
•  Switch the ignition off.
•  Using the M-MDS, perform the DTC inspection for the instrument cluster.
•  Are any DTCs detected?
Yes
Go to applicable DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER].)
No
Go to the next step.
2
INSPECT TCS OFF SWITCH (2WD)/OFF-ROAD TRACTION ASSIST SWITCH (4WD) SIGNAL CIRCUIT FOR SHORT TO GROUND
•  Switch the ignition off.
•  Disconnect the cluster switch connector.
•  Disconnect the instrument cluster connector.
•  Inspect for continuity between the cluster switch connector terminal B (vehicle harness-side) and body ground.
•  Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 5.
No
Go to the next step.
3
INSPECT TCS OFF SWITCH (2WD)/OFF-ROAD TRACTION ASSIST SWITCH (4WD) SIGNAL CIRCUIT FOR OPEN CIRCUIT
•  Inspect for continuity between the cluster switch connector terminal C (vehicle harness-side) and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 5.
4
INSPECT TCS OFF SWITCH (2WD)/OFF-ROAD TRACTION ASSIST SWITCH (4WD)
•  Inspect the TCS OFF switch (2WD)/Off-Road Traction Assist switch (4WD).
•  Is the TCS OFF switch (2WD)/Off-Road Traction Assist switch (4WD) normal?
Yes
Go to the next step.
No
Replace the cluster switch, then go to the next step.
(See CLUSTER SWITCH REMOVAL/INSTALLATION.)
5
VERIFY THAT THE SAME DTC IS NOT PRESENT
•  Reconnect all disconnected connectors.
•  Clear the DTCs from the memory.
•  Using the M-MDS, perform the DSC HU/CM DTC inspection.
•  Is the same Pending DTC present?
Yes
Repeat the inspection from Step 1.
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCS ARE PRESENT
•  Are any other DTCs output?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [DSC HU/CM].)
No
DTC troubleshooting completed.