Electronic Overhead Module (EOM)

U0019-CAN B BUS





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Continuously.

- Set Condition:
If the Can B Bus (+) or B Bus (-) circuit is open, shorted to voltage, or shorted to ground.





1. CHECK FOR ACTIVE DIAGNOSTIC TROUBLE CODE (DTC) U0019-CAN B BUS
1. Turn the ignition on.
2. With the scan tool, record and erase any Electronic Overhead Module DTCs.
3. Turn the ignition off, wait 30 seconds then turn the ignition on.
4. With the scan tool, read DTCs.

Is DTC U0019-CAN B BUS active?

Yes

- Go To 2

No

- The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE TIPM
1. With the scan tool, read TIPM DTCs

Does the scan tool display any active CAN B BUS related DTCs?

Yes

- Diagnose and repair the DTCs. Testing and Inspection

No

- Go To 3

3. CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the negative battery cable.
3. Disconnect the Electronic Overhead Module harness connector.
4. Disconnect the TIPM C6 harness connector.
5. Measure the resistance of the (D55) Can B Bus (+) circuit between the TIPM C6 harness connector and the Electronic Overhead Module harness connector.

Is the resistance below 2.0 ohms?

Yes

- Go To 4

No

- Repair the Can B Bus (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (D54) CAN B BUS (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D54) Can B Bus (-) circuit between the TIPM C6 harness connector and the Electronic Overhead Module harness connector.

Is the resistance below 2.0 ohms?

Yes

- Replace the Electronic Overhead Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the Can B Bus (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.