*NO RESPONSE FROM EOM (ELECTRONIC OVERHEAD MODULE)

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(A114) FUSED B(+) CIRCUIT OPEN OR SHORTED

(Z915) GROUND CIRCUIT OPEN

(D55) AND (D54) CAN B BUS CIRCUITS OPEN

ELECTRONIC OVERHEAD MODULE

Diagnostic Test

1.TEST FOR INTERMITTENT CONDITION

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 on the Bus network. A green check indicates that the module is active on the Bus network.

Does the scan tool display a red X next to the module?

Yes

Go To 2

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 connectors for broken, bent, pushed out, and corroded terminals.

2.(A114) FUSED B(+) CIRCUIT OPEN OR SHORTED

Does the test light illuminate brightly?

Yes

Go To 3

Repair the (A114) Fused B(+) circuit for an open or short.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

3.(Z915) GROUND CIRCUIT OPEN

Does the test light illuminate brightly?

Yes

Go To 4

Repair the (Z915) ground circuit for an open.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

4.(D55) AND (D54) CAN B BUS CIRCUITS OPEN

NOTE: One open circuit will not cause this condition.

Is there any voltage present on either circuit?

Yes

Replace the Electronic Overhead Module (EOM) in accordance with the service information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).