Electronic Power Steering Module (EPS)

U0422-00 IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE

- When Monitored:
Continuously with the ignition on, one valid CAN message received at least once, and no U0002-00-CAN C Bus Off Performance DTC present.

- Set Conditions:
When the Electric Power Steering (EPS) Module detects an incorrect CAN message from the Body Control Module (BCM).





Diagnostic Test

1. VERIFY THE DTC IS ACTIVE

NOTE: This DTC must be active for the results of this test to be valid.

1. Perform any Technical Service Bulletins (TSBs) that may apply.
2. Turn the ignition on.
3. With the scan tool, record and erase the DTCs.
4. Cycle the ignition switch from off to on.
5. With the scan tool, read the DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Perform the EPS VERIFICATION TEST. EPS Verification Test.

2. CHECK POWERTRAIN CONTROL MODULE (PCM) CAN BUS DTCS ARE PRESENT
1. With the scan tool, read the PCM DTCs.

Are there any PCM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedures. Testing and Inspection.
- Perform the EPS VERIFICATION TEST. EPS Verification Test.

No

- Go To 3

3. CHECK BODY CONTROL MODULE (BCM) CAN BUS DTCS ARE PRESENT
1. With the scan tool, read the BCM DTCs.

Are there any BCM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedures. Testing and Inspection.
- Perform the EPS VERIFICATION TEST. EPS Verification Test.

No

- Using the schematics as a guide, check the Electric Power Steering (EPS) Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Electric Power Steering (EPS) Module. Steering Gear - Removal.
- Perform the EPS VERIFICATION TEST. EPS Verification Test.