CMTC or EVIC Inoperative

CMTC OR EVIC INOPERATIVE

CMTC Or EVIC Inoperative:

POSSIBLE CAUSES
- (F21) Fused ignition switch output (run/start) circuit open
- (Z13) Electronic overhead module ground circuit open
- Electronic overhead module

1. (F21) FUSED IGNITION RUN/START CIRCUIT OPEN

NOTE: Diagnose and repair any MIC, FCM, PCM, or Communication DTCs before proceeding.




Turn the ignition off.
Disconnect the Electronic Overhead Module harness connector.
Turn the ignition on.
Measure the voltage between the (F21) Fused Ignition Switch Output (Run/Start) circuit and ground.

Q: Is the voltage below 0.5 volts?

YES: Repair the (F21) Fused Ignition Switch Output (Run/Start) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 2

2. (Z13) ELECTRONIC OVERHEAD MODULE GROUND CIRCUIT OPEN




Turn the ignition off.
Measure the resistance between ground and the (Z13) Electronic Overhead Module Ground circuit.

Q: Is the resistance above 5.0 ohms?

YES: Repair the (Z13) Electronic Overhead Module Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace the Electronic Overhead Module. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test