For 1990-2009 cars
ABS Components
Cell 44: ABS/TCS Switch, Isolation Valve Solenoids, and PCM
Handling ESD Sensitive Parts Notice
Cell 50: Serial Data UART
Cell 14: G102, G104, G106, G110, and G301 (Battery Ground)

### Circuit Description

The PCM monitors various parameters. The PCM will not allow operation of the traction control system if any parameter falls below a predetermined value.

### Conditions for Setting the DTC

When a malfunction is detected by the PCM, the PCM causes the TCS to shutdown until the malfunction is corrected.

### Action Taken When the DTC Sets

This DTC is a temporary operational malfunction.

The following actions are taken when the DTC sets:

• | A malfunction DTC is stored

• | The TCS is disabled

• | The TRACTION OFF indicator is turned ON

The ABS remains functional.

If the TCS is no longer inhibited, the indicator lamp will be turned OFF but the DTC will still be stored.

### Conditions for Clearing the DTC

Traction Control will remain disabled until the EBTCM receives a traction allowed message from the PCM. When the EBTCM receives this message, it re-enables the TCS and turns OFF the TRACTION OFF indicator.

### Diagnostic Aids

Check for PCM DTCs. If no PCM DTC is stored, DTC C1275 may have set due to a hot engine or a hot transaxle (both normal conditions). No repairs should be made to the Traction Control System.

Perform a thorough inspection of the wiring and the connectors.

Failure to carefully inspect wiring may result in a misdiagnosis. A misdiagnosis may result in replacing parts without repairing the malfunction.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the ABS Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check - ABS
2 |

1. Turn the ignition switch to the RUN position.
2. Use the scan tool in order to read the DTCs.

Make note of the DTCs.

Are any other ABS/TCS or PCM DTCs set?

--

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls -4.0, 4.6L or Diagnostic Trouble Code (DTC) List for the appropriate DTC

Go to Step 3

3 |

1. Use the scan tool in order to clear the DTCs.
2. Turn the ignition switch to the OFF position.
3. Turn the ignition switch to the RUN position.

Does DTC C1275 reset?

--

Go to Step 5

Go to Step 4

4 |

1. Start the engine and test drive the vehicle at a speed of at least 16 km/h (10 mph).
2. Repeat the above drive cycle sequence two more times.

Did the DTC C1275 set in these last three drive cycles?

--

Go to Step 5

Go to Diagnostic System Check - ABS

5 | Perform a Powertrain OBD System Check. Refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.0, 4.6L. Did the vehicle pass the OBD system check? | -- | Go to Step 6 | Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 4.0, 4.6L
6 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the repair complete? | -- | Go to Diagnostic System Check - ABS | --