U0010-00

U0010-00-CAN INTERIOR BUS







- When Monitored:
Continuously with the ignition on.

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





Always perform the HVAC Pre-Diagnostic Troubleshooting procedure before proceeding. Initial Inspection and Diagnostic Overview.

1. VERIFY THE DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, read HVAC DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

No

- Go To 7

2. CHECK FOR ACTIVE CAN BUS RELATED DTCS IN THE TOTALLY INTEGRATED POWER MODULE (TIPM)
1. With the scan tool, read the Totally Integrated Power Module (TIPM) DTCs.

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

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 3

3. CHECK (D265) CAN INTERIOR BUS (+) CIRCUIT FOR AN OPEN




1. Turn the ignition off to the lock position.
2. Disconnect the negative battery cable.
3. Disconnect the A/C Heater Control C1 harness connector.
4. Disconnect the Totally Integrated Power Module (TIPM) C7 harness connector.
5. Measure the resistance of the (D265) CAN Interior Bus (125K) (+) circuit between the Totally Integrated Power Module (TIPM) C7 harness connector and the A/C Heater Control C1 harness connector.

Is the resistance below 1.0 Ohm?

Yes

- Go To 4

No

- Repair the (D265) CAN Interior Bus (125K) (+) circuit for an open.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

4. CHECK (D264) CAN INTERIOR BUS (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D264) CAN Interior Bus (125K) (-) circuit between the Totally Integrated Power Module (TIPM) C7 connector and the A/C Heater Control C1 harness connector.

Is the resistance below 1.0 Ohm?

Yes

- Go To 5

No

- Repair the (D264) CAN Interior Bus (125K) (-) circuit for an open.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

5. CHECK (D265) CAN C INTERIOR BUS (125K) (+) CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (D265) CAN C Interior Bus (125K) (+) circuit in the A/C Heater Control C1 harness connector.

Is the resistance above 100k Ohms?

Yes

- Go To 6

No

- Repair the (D265) CAN C Interior Bus (125K) (+) circuit for a short to ground.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

6. CHECK (D264) CAN C INTERIOR BUS (-) CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (D264) CAN C Interior Bus (125K) (-) circuit.

Is the resistance above 100k Ohms?

Yes

- Replace the A/C Heater Control.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

No

- Repair the (D264) CAN C Interior Bus (125K) (-) circuit for a short to ground.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

7. CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
3. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, partially broken wires.
4. Check the connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
5. Wiggle the wiring and connectors while checking for shorted and open circuits.
6. With the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.

Were there any problems found?

Yes

- Repair as necessary.
- Perform HVAC VERIFICATION TEST HVAC Verification Test.

No

- Test complete.