Pinpoint Test I: DTC U0121:00
- I1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify that there is an observable symptom present.
- Is an observable symptom present?
- Yes
: GO to I2.
- No
: The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
- I2 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Network Test.
- Carry out the network test.
- Does the ABS module pass the network test?
- I3 RECHECK THE PAM DTCs
- Clear the DTCs.
- Operate the system and test the system for normal operation.
- Repeat the PAM self-test.
- Is DTC U0121:00 still present?
- Yes
: GO to I4.
- 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.
- I4 CHECK FOR DTC U0121 OR DTC U0121:00 IN OTHER MODULES
- Clear all DTCs.
- Ignition OFF.
- Wait 10 seconds.
- Enter the following diagnostic mode on the scan tool: Self-Test.
- Retrieve the continuous memory DTCs from all modules.
- Is DTC U0121 or DTC U0121:00 set in any module?
- I5 CHECK FOR CORRECT PAM OPERATION
- Disconnect the PAM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the PAM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes
: INSTALL a new PAM. REFER to
PARKING AID SYSTEM
article. TEST the system for normal operation.
- No
: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.