Antilock Braking System (ABS)

DTC 36 Low System Voltage:

Circuit Description:

This DTC is used to monitor the voltage level available to the EBCM/EBTCM. If the voltage drops below 11.0 volts, full performance of the ABS system cannot be guaranteed. During ABS operation, there are several current requirements that will cause battery voltage to drop. Because of this, voltage is monitored prior to ABS operation (to indicate good charging system condition) and also during ABS operation when voltage may drop significantly.

DTC Will Set When:
DTC 36 can only be set if the vehicle's speed is greater than 5 km/h (3 mph). If both the switched battery and switched ignition voltages are less than 11.2 volts non-ABS or less than 9.6 volts ABS, a malfunction exists.

Action Taken:
A malfunction DTC is stored, ABS is disabled and the ABS indicator lamp is turned "ON."

DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Tests to see if malfunction is present.
2. Checks charging system integrity.
3. Checks for excessive resistance in the switched battery input circuit.
4. Tests for open or high resistance in the switched ignition circuit.
5. Ensures low voltage condition was not due to a poor connection.

Diagnostic Aids:
An "intermittent" malfunction is most likely caused by a poor connection, rubbed through wire insulation or a wire that is broken inside the insulation.

The frequency of the malfunction can be checked by using the enhanced diagnostic function of the Tech 1.

Any circuitry that is suspected as causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness.