|
|
Possible Causes (A419) (A420) FUSED B (+) CIRCUIT OPEN OR SHORTED (Z960) GROUND CIRCUIT OPEN (D55) AND (D54) CAN B BUS CIRCUITS OPEN AMPLIFIER Diagnostic Test 1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts. NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active Does the scan tool display a red X next to the module? Yes >> Go To 2 No >> The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness con- 2. (A419) (A420) FUSED B(+) CIRCUIT OPEN OR SHORTED Turn the ignition off. Disconnect the Radio Amplifier C1 harness connector. Using a 12-volt test light connected to ground, check each (A419) and Does the test light illuminate brightly for each circuit? Yes >> Go To 3 No >> Repair the (A419) or (A420) Fused B(+) circuit for an open or short. Perform the BODY VERIFICATION TEST – VER 1. (Refer PM ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 123 |