DTC 36
36 LOW SYSTEM VOLTAGEDTC 36 Low System Voltage:
DTC 36 Low System Voltage:
DTC 36 Low System Voltage:
Circuit Description:
This DTC is used to monitor the voltage level available to the EBCM controller. If the voltage drops below 11 volts, full performance of the ABS system cannot be guaranteed. During ABS operation, there are several current requirements that will cause battery voltage at the EBCM to drop. Because of this, voltage is monitored prior to an ABS event to indicate good charging system condition and also during an ABS event 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 the switched battery voltage is less than 11.2 volts non-ABS event or less than 9.6 volts during a ABS event, a malfunction exists.
Action Taken:
A malfunction DTC is stored, ABS is disabled and the amber ABS warning lamp is turned "ON." The red BRAKE warning lamp is turned "ON" if the rear piston in the ABS motor pack is not in the home position.
DTC Chart Test Description:
Number(s) below refer to circled number(s) on the diagnostic chart.
1. Checks to see what voltage is readily available at connector "C1", terminal "C" of the EBCM. If voltage is representative of good charging system condition, a malfunction is not present.
2. Isolates the condition to high circuit resistance, or improper charging system operation.
3. Isolates which circuit is the source of the high resistance condition.
4. Checks for high resistance in CKT 542.
5. Checks for high resistance in CKT 341.
6. Checks for high resistance in Fuse 13 voltage feed CKTs 142 or 300.
7. Checks for possible intermittent malfunction or a malfunctioning EBCM.
Diagnostic Aids:
An "Intermittent" malfunction may be 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 of 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.
While performing a voltage load test, if it is noted that only the ignition voltage drops below acceptable voltage levels, CKT 341 should be checked for high resistance or an open condition.