C1236

CIRCUIT DESCRIPTION
This circuit monitors the voltage level available to the EBCM/EBTCM. If the voltage drops below 10.5 volts, full performance of the ABS/TCS cannot be guaranteed. During ABS/TCS operation, there are several current requirements that will cause battery voltage to drop. The voltage is monitored under the following conditions:
^ Prior to ABS/TCS operation in order to indicate good charging system condition
^ During ABS/TCS operation when the voltage may drop significantly

CONDITIONS FOR SETTING THE DTC
^ The vehicle speed is greater than 8 km1h (5 mph).
^ The battery and the ignition voltages are less than 10.5 volts.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored.
^ The ABS/TCS is disabled.
^ The ABS indicator is turned ON.
^ The TRACTION OFF indicator is turned ON.

CONDITIONS FOR CLEARING THE DTC
^ The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
^ The EBCM/EBTCM does not detect the DTC in 50 drive cycles.

DIAGNOSTIC AIDS
^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.
^ If an intermittent malfunction exists, refer to Intermittents and Poor Connections Diagnosis in Diagnostic Aids.
^ Inspect for other low voltage conditions.
^ Test the charging system.
^ The following conditions may cause low system voltage:
- A charging system malfunction
- Excessive parasitic drain
- A weak battery
- A faulty system ground

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests for a good ground.
6. This step tests for battery voltage.