Pinpoint Test AU : U0121:00
- AU1 VERIFY THE CUSTOMER CONCERN
- Ignition ON.
- Verify there is an observable symptom present.
Is an observable symptom present?
Yes GO to AU2. 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. - AU2 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a scan tool, perform a network test.
- Carry out the network test.
Does the ABS module pass the network test?
Yes GO to AU3. No REFER to Module Communications Network . - AU3 RETRIEVE THE RECORDED DTCs FROM THE ABS MODULE SELF-TEST
- Using a scan tool, perform 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 AU4. - AU4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST
- Using a scan tool, perform the IPC self-test.
Is DTC U3003:16 or DTC U3003:17 recorded?
Yes For DTC U3003:16, GO to Pinpoint Test BD . For DTC U3003:17, GO to Pinpoint Test BE . No GO to AU5. - AU5 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, Refer to IPC Hardware Testing . 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.