DTC 53

Code 53 Chart:

Code 53 Wiring Diagram:

CIRCUIT DESCRIPTION:


Code 53 will set when the ignition is "ON" and ECM terminal "BB1" and "BC16" voltages are more than 17.1 volts for about 0.2 seconds.

During the time the failure is present, all ECM outputs will be disengaged. (The setting of additional codes may result).


TEST DESCRIPTION: Numbers below refer to circled numbers on the diagnostic chart.

1. Normal battery output is between 10-17.0 volts.

2. Checks to see if the high voltage reading is due to the generator or ECM. With engine running, check voltage at the battery. If the voltage is above 17.1 volts, the ECM is OK.

3. Checks to see if generator is faulty under load condition.


NOTE ON INTERMITTENTS:


Charging battery with a battery charger and starting engine, may set Code 53. If code sets when an accessory is operated, check for poor connections or excessive current draw. Also, check for poor connections at starter solenoid or fusible link junction box.