Circuit Description
The class 2 serial data line from the EBTCM controls the TRACTION OFF indicator. When the EBTCM sees the traction control line go low through the momentary Traction Control switch, the EBTCM disables traction control and sends a message to the IPC to turn the TRACTION OFF indicator on. Each time the ignition switch is cycles OFF to RUN, the Traction Control enables until the Traction Control switch is depressed.
Diagnostic Aids
| • | Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors may result in misdiagnosis. Misdiagnosis may cause part replacement without repairing the malfunction. |
| • | One of the following conditions may cause an intermittent malfunction: |
| - | A poor connection |
| - | Rubbed through wire insulation |
| - | A broken wire inside the insulation |
| • | If an intermittent malfunction exists, refer to Testing for Electrical Intermittents in Wiring Systems. |
Test Description
The number below refers to the step number on the diagnostic table:
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check |
Did the TRAC OFF indicator turn ON then turn OFF? | -- | Go to Step 3 | Go to Step 7 | |
3 |
Is the resistance within the specified range? | 5-15 ohms | Go to Step 6 | Go to Step 4 |
4 |
Is the resistance less than the specified value? | 5 ohms | Go to Step 5 | Go to Step 8 |
5 | Measure the resistance between the traction control switch connector terminal A and a good ground. Is the resistance less than the specified value? | 5 ohms | Go to Step 9 | Go to Step 10 |
6 | Replace the EBCM/EBTCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check | -- |
7 | Suspect the IPC. Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console. Is the diagnosis complete? | -- | Go to Diagnostic System Check | -- |
8 | Repair the open in CKT 1571. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Diagnostic System Check | -- |
9 | Replace the traction control switch. Refer to Shift Lever Replacement - On Vehicle in Steering Wheel and Column - Tilt. Is the repair complete? | -- | Go to Diagnostic System Check | -- |
10 | Repair the open in CKT 351. Refer to Wiring Repairs in Wiring Systems. Is the circuit repair complete? | -- | Go to Diagnostic System Check | -- |
