C1285

DTC C1285 Lateral Accelerometer Sensor Circuit Malfunction






Circuit Description

The lateral accelerometer output is measured by the EBTCM when the ignition is ON. The usable output voltage range for the lateral accelerometer is 0.25-4.75 volts. The scan tool will report a zero lateral accelerometer signal of 2.5 volts if no sensor bias (offset) is present.

Conditions for Setting the DTC

All of the following conditions occur:

- The ignition is ON.
- The lateral accelerometer input is less than 0.15 volts or greater than 4.85 volts for more than 1 second.

Action Taken When the DTC Sets

- A malfunction DTC is stored.
- Stabilitrak is disabled.
- The DIC displays the SERVICE STABILITY SYS message.
- The ABS/TCS remain functional.

Conditions for Clearing the DTC

- The condition for DTC is no longer present and you used scan tool Clear DTCs function.
- The condition for DTC is no longer present and you used the On-Board Clear DTCs function.
- The EBTCM does not detect the DTC in 50 drive cycles.

Diagnostic Aids

- During diagnosis, park the vehicle on a level surface.
- Find out from the driver under what conditions the DTC was set (when the DIC displayed the SERVICE STABILITY SYS message). This information will help to duplicate the failure.
- Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.
- Poor connections, broken insulation, or a break in the wire inside the insulation may cause an intermittent malfunction.
- If an intermittent malfunction exists, refer to Intermittents and Poor Connections