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1.

Refer to "Shop Manual" and remove necessary parts to allow access to control units that connected to CCP-CAN Communication circuit.

2.

Connect GDS to Data Link Connector (DLC).

3.

Ignition "ON"

4.

Disconnect PM sensor unit and ECM connector one at a time.

5.

Monitor "Diagnostic Trouble Codes(DTC)" with GDS.

6.

Does the status of DTC U007400 changes to "History" when certain unit connector is disconnected?

▶ If the status of DTC is changed to "History" when certain control unit is disconnected and no problems were found with the circuits or connectors, replace control unit that disconnected from CCP-CAN network and then go to "Verification of Vehicle Repair" procedure.

▶ Carefully re-do this troubleshooting guide steps.

▶ If no problems were found with the circuits or connectors, replace ECM and then go to "Verification of Vehicle Repair" procedure.