PINPOINT TEST R: DTCs C0051:23, 27, 29, 54 AND 64

• Ignition ON.
• Using a scan tool, carry out the Network Test.

Are any DTCs present in the RCM  , PSCM or SCCM ? 

• Yes  : DIAGNOSE all RCM  , PSCM  or SCCM  DTCs before diagnosing any ABS module DTCs.

  For RCM  DTCs, REFER to SUPPLEMENTAL RESTRAINT SYSTEM .

  For PSCM  DTCs, REFER to STEERING SYSTEM .

  For SCCM  DTCs, REFER to STEERING COLUMN SWITCHES .

• No  : GO to R2  .

• Review the ABS module DTCs retrieved during the Network Test in the previous step.

Are ABS module DTCs C0061:xx, C0062:xx, C0063:xx or U0074:88 present in the ABS module? 

• Yes  : GO to PINPOINT TEST H .
• No  : If there are any communication (U-Code) DTCs present in the ABS module, DIAGNOSE those before diagnosing any C0051:xx DTCs.

  If there are any C0051:xx DTCs present, GO to R3  .

  For all other ABS module DTCs, REFER to the ABS MODULE DTC CHART .

  If no DTCs are present in the ABS module, GO to  R4.

• Center the clockspring and steering wheel rotation sensor. Refer to the Clockspring Adjustment general procedure in SUPPLEMENTAL RESTRAINT SYSTEM .
• Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
• Using a scan tool, carry out the ABS module self-test.

Are there are C0051:xx DTCs present in the ABS module? 

• Yes  : GO to  R9.
• No  : The concern is not present and cannot be recreated at this time. The DTC may have been set due to an off center steering wheel rotation sensor.

• Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
• Read and record the YAW_RATE PID  with the vehicle on level ground and at a complete standstill.
• Monitor the YAW_RATE PID  while rocking and shaking the vehicle.

Is the YAW_RATE PID value between -0.05 and 0.05 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved? 

• Yes  : GO to R5  .
• No  : GO to  R8.

• Read and record the LAT_ACCL PID  with the vehicle on level ground and at a complete standstill.
• Monitor the LAT_ACCL PID  while rocking and shaking the vehicle.

Is the LAT_ACCL PID value between -0.4 and 0.4 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved? 

• Yes  : GO to R6  .
• No  : GO to  R8.

• Read and record the LONG_ACCL PID  with the vehicle on level ground and at a complete standstill.
• Monitor the LONG_ACCL PID  while rocking and shaking the vehicle.

Is the LONG_ACCL PID value between -0.4 and 0.4 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved? 

• Yes  : GO to R7  .
• No  : GO to  R8.

• Read and record the ROLL_RATE PID  with the vehicle on level ground and at a complete standstill.
• Monitor the ROLL_RATE PID  while rocking and shaking the vehicle.

Is the ROLL_RATE PID value between -0.5 and 0.5 with the vehicle at a standstill and does the PID fluctuate when the vehicle is moved? 

• Yes  : GO to  R9.
• No  : GO to R8  .

• Ignition OFF.
• If not previously directed to do so, depower the SRS  . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
• Inspect the RCM  installation and make sure that the fasteners are fully seated and tightened correctly. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
• Inspect the mounting surface for damage, corrosion or foreign material.

Is the RCM installed correctly and is the mounting surface clean and free from damage? 

• Yes  : GO to  R10.
• No  : REPAIR or INSTALL new as necessary. REPOWER the SRS  . REFER to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .

• Disconnect: RCM C310A  .
• Disconnect: RCM C310B  .
• Disconnect: SCCM C2414A  .
• Disconnect: SCCM C2414B  .
• Disconnect: ABS Module C135  .
• Remove the steering wheel rotation sensor. Refer to STEERING WHEEL ROTATION SENSOR .
  • inspect the connectors (including any in-line connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
  • inspect the wire harnesses for any damage, pinched, cut or pierced wires.
  • repair any concerns found.

    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

• Install the steering wheel rotation sensor. Refer to STEERING WHEEL ROTATION SENSOR .
• Connect: All Previously Disconnected Components and Connectors.
• Repower the SRS  . Do not  prove out the SRS  at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
• Perform a road test.
• Ignition ON.
• Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.

Is the concern still present? 

• Yes  : INSTALL a new steering wheel rotation sensor. REFER to STEERING WHEEL ROTATION SENSOR . CLEAR all CMDTCs  . PERFORM a road test. REPEAT the ABS module self test.

  If the concern is still present, GO to R10  .

  If other DTCs are present, REFER to the appropriate DTC CHART .

• No  : The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector. Do not install any new SRS components at this time  . SRS components should only be installed when directed to do so in the pinpoint test  .

• Depower the SRS  . Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
• Disconnect: RCM C310A  .
• Disconnect: RCM C310B  .
• Prior to reconnecting any previously disconnected SRS  component:
  • inspect the connectors (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
  • inspect the wire harness for any damage, pinched, cut or pierced wires.
  • inspect RCM  C310A and C310B CPA  lever/lock for correct operation. Refer to RCM  in SUPPLEMENTAL RESTRAINT SYSTEM .
  • repair any concerns found.

    Refer to OEM CONNECTOR REPAIR PROCEDURES for schematic and connector information.

• Connect: All Previously Disconnected Connectors.
• Repower the SRS  . Do not  prove out the SRS  at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in SUPPLEMENTAL RESTRAINT SYSTEM .
• Test drive the vehicle at speeds greater than 20 km/h (12 mph) and make at least 1 left turn and 1 right turn.
• Ignition ON.
• Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.

Is the concern still present? 

• Yes  : INSTALL a new RCM  . REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
• No  : The concern is not present and cannot be recreated at this time. The DTC may have been set due to high network traffic, an intermittent fault condition or a loose or corroded connector.