Pinpoint Test At: DTC U0121:00

AT1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify there is an observable symptom present.
- Is an observable symptom present?
  - Yes : GO to AT2.
  - 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.
AT2 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?
  - Yes : GO to AT3.
  - No : REFER to MODULE COMMUNICATIONS NETWORK .
AT3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST
- Check for recorded DTCs from the ABS module self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?
  - Yes : REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .
  - No : GO to AT4.
AT4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST
- Check for recorded DTCs from the IPC self-test.
- Is DTC U3003:16 or DTC U3003:17 recorded?
  - Yes : For DTC U3003:16, GO to Pinpoint Test BC .
    For DTC U3003:17, GO to Pinpoint Test BD .
  - No : GO to AT5.
AT5 RECHECK THE IPC DTCs
- Clear the DTCs.
- Wait 10 seconds.
- Repeat the IPC self-test.
- Is DTC U0121:00 still present?
  - Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL . CLEAR the DTCs. REPEAT the IPC self-test. If DTC U0121:00 is still present, INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.
  - 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.