Diagnostic Routine N

Diagnostic Routine N

Diagnostic Overview

U0121:00

Normal Operation and Fault Conditions

DTC Fault Trigger Conditions





Pinpoint Test

1. VERIFY THE CUSTOMER CONCERN

1. Ignition ON.

2. Verify there is an observable symptom present.

Is an observable symptom present?






2. CHECK THE COMMUNICATION NETWORK

1. Ignition ON.

2. Using a scan tool, perform a network test.

Does the ABS (Anti-Lock Brake System) module pass the network test?






3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE BCM (Body Control Module) SELF-TEST

1. Using a scan tool, perform the BCM (Body Control Module) self-test.

Is DTC (Diagnostic Trouble Code) U3003:16 or DTC (Diagnostic Trouble Code) U3003:17 recorded?






4. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE ABS (Anti-Lock Brake System) MODULE SELF-TEST

1. Using a scan tool, perform the ABS (Anti-Lock Brake System) module self-test.

Is DTC (Diagnostic Trouble Code) U3003:16 or DTC (Diagnostic Trouble Code) U3003:17 recorded?






5. RECHECK THE BCM (Body Control Module) DTCs (Diagnostic Trouble Codes)

NOTE: If new modules were installed prior to the DTC (Diagnostic Trouble Code) being set, the module configuration may be incorrectly set during the PMI (Programmable Module Installation) or the PMI (Programmable Module Installation) may not have been carried out.

1. Clear the DTCs (Diagnostic Trouble Codes).

2. Wait 10 seconds.

3. Using a scan tool, perform the BCM (Body Control Module) self-test.

Is DTC (Diagnostic Trouble Code) U0121:00 still present?






6. CHECK FOR DTC (Diagnostic Trouble Code) U0121:00 SET IN OTHER MODULES

1. Clear all DTCs (Diagnostic Trouble Codes).

2. Ignition OFF.

3. Ignition ON.

4. Wait 10 seconds.

5. Using a scan tool, retrieve all continuous memory DTCs (Diagnostic Trouble Codes).

Is DTC (Diagnostic Trouble Code) U0121:00 set in the PSCM (Power Steering Control Module)?