Sunroof Module

U0010 - CAN Interior Bus

For a complete wiring diagram, refer to.

• When Monitored: Continuously.

• Set Condition: Whenever the CAN C interior bus 125K+ or CAN C interior bus 125K- circuit is open, short to voltage or short to ground.






Test Step 1 - Check For Active DTCs

• Turn the ignition ON.

• With the scan tool, read the active DTCs.

Does the scan tool display U0010 - CAN Interior Bus?

Yes

• Go to Test Step 2

No

• If the DTC is stored, check for an intermittent condition. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - Check TIPM DTCs

• With the scan tool, read TIPM active DTCs

Does the scan tool display any active CAN C Interior Bus DTCs?

Yes

• Refer to => Non-DTC Based Diagnostics for the diagnostic test procedure.

No

• Go to Test Step 3

Test Step 3 - Check the CAN C Interior Bus 125K+ Circuit for a Short to Voltage

• Turn the ignition OFF.

• Disconnect the negative battery cable.

• Disconnect the sunroof motor/module harness connector.

• Disconnect the TIPM C7 harness connector.

• Turn the ignition ON.

• Measure the voltage of the CAN interior bus 125K+ circuit in the TIPM C7 harness connector.

Is the voltage less than 0.2 volts?

Yes

• Go to Test Step 4

No

• Repair the CAN C interior bus 125K+ circuit for a short to voltage.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 4 - Check the CAN C Interior Bus 125K (-) Circuit for a Short to Voltage

• Turn the ignition ON.

• Measure the voltage of the CAN interior bus 125K (-) circuit in the TIPM C7 harness connector.

Is the voltage less than 0.2 volts?

Yes

• Go to Test Step 5

No

• Repair the CAN C interior bus 125K (-) circuit for a short to voltage.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 5 - Check the CAN C Interior Bus 125K+ Circuit for a Short to Ground

• Turn the ignition OFF.

• Measure the resistance between ground and the CAN interior bus 125K+ circuit in the TIPM C7 harness connector.

Is the resistance more than 10k ohms?

Yes

• Go to Test Step 6

No

• Repair the CAN C interior bus 125K+ circuit for a short to ground.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 6 - Check the CAN C Interior Bus 125K (-) Circuit for a Short to Ground

• Turn the ignition OFF.

• Measure the resistance between ground and the CAN interior bus 125K (-) circuit in the TIPM C7 harness connector.

Is the resistance more than 10k ohms?

Yes

• Go to Test Step 7

No

• Repair the CAN C Interior bus 125K (-) circuit for a short to voltage.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 7 - Check the CAN C Interior Bus 125K+ Circuit for an Open

• Measure the resistance of the CAN interior bus 125K+ circuit between the TIPM C7 harness connector and the sunroof motor/module harness connector.

Is the resistance less than 2.0 ohms?

Yes

• Go to Test Step 8

No

• Repair the CAN C interior bus 125K+ circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 8 - Check the CAN C Interior Bus 125K (-) Circuit for an Open

• Measure the resistance of the CAN C interior bus 125K (-) circuit between the TIPM C7 harness connector and the sunroof motor/module harness connector.

Is the resistance less than 5.0 ohms?

Yes

• Replace the sunroof motor/module.

• Perform the sunroof position calibration. Perform the excessive force limitation calibration.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Repair the CAN C Interior bus 125K (-) circuit for an open.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior