Pinpoint Test W: DTC U0253:00

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow this instruction may result in the accidental deployment of the Safety Canopy and cause serious personal injury or death.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.

NOTE: SRS components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS.

NOTE: Always make sure the correct SRS component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford Catalog Advantage™ or equivalent to make sure the correct component is being installed. If an incorrect SRS component is installed, DTCs may set.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.

W1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Does the APIM pass the network test?
- Yes : GO to W2.
- No : REFER to MODULE COMMUNICATIONS NETWORK to diagnose no communication with the APIM.
W2 CHECK THE RCM CMDTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Enter the following diagnostic mode on the scan tool: Clear All CMDTCs.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self Test - RCM.
- Is DTC U0253:00 retrieved again?
- Yes : GO to W3.
- No : The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
W3 RETRIEVE THE RECORDED DTCs FROM THE RCM SELF-TEST
- Check for recorded DTCs from the RCM self-test.
- Is DTC U3003:16 or U3003:17 recorded?
- Yes : REFER to the RCM DTC Chart to diagnose the RCM DTCs.
- No : GO to W4.
W4 RETRIEVE THE RECORDED DTCs FROM THE APIM SELF-TEST
- Check for recorded DTCs from the APIM self-test.
- Is DTC U3003:16 or U3003:17 recorded?
- Yes : Diagnose the APIM DTCs. Refer to the appropriate information in INFORMATION SYSTEM AND ENTERTAINMENT SYSTEM for the procedure.
- No : CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSBs address this concern, INSTALL a new APIM. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . CLEAR the RCM DTCs and REPEAT the RCM self-test. If DTC U0253:00 is retreived again, INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) .