PSCM Circuit Information

Refer to Power Steering Controls wiring diagrams for schematic and connector information.

Refer to Steering GSB for additional connector and wiring inspection tips.

1. CC1: VERIFY STEERING TYPE 
   • This pinpoint test is applicable to HPAS vehicles equipped with an electric steering actuator only. It DOES NOT apply to EPAS vehicles.
   • Inspect the vehicle and determine if the steering system is EPAS or HPAS with an electric steering actuator.
     • The presence of a power steering pump, hydraulic hoses or tubes indicates a HPAS system.
   • Is this vehicle equipped with HPAS and an electric steering actuator?

   Yes	No
   Go to  CC2.	GO to PINPOINT TEST BF.

2. CC2: CHECK FOR PSCM DTCS U0121:00 OR U0415:00 
   • Ignition ON, engine running.
   • Drive the vehicle above 20 km/h (12 mph) for at least 5 minutes. Carry out the PSCM self-test.
   • Is DTC U0121:00 or U0415:00 currently present and active in the PSCM?

   Yes	No
   For DTC U0415, GO to PINPOINT TEST AT.  For DTC U0121, GO to PINPOINT TEST AK.	Go to  CC3.

3. CC3: INSPECT THE EPAS WIRING HARNESS AND ELECTRICAL CONNECTORS 
   • Ignition OFF.
   • Using a good light source, thoroughly inspect the electronic steering actuator wire harness for:
     • cut wires
     • pinched wires
     • broken wires
     • corrosion
   • PSCM_A connector disconnected. (C225A)
   • Using a good light source, inspect all disconnected electrical connectors for the following:
     • corrosion
     • damaged or bent pins
     • pushed-out pins
     • spread terminals
   • Are the wire harness and the above electrical connectors in good condition? 

   Yes	No
   Go to  CC4.	If the electrical connectors are not OK, REPAIR or INSTALL new electrical connectors as necessary. If the electronic steering actuator wire harness is not OK, REPAIR the wiring harness as necessary.

4. CC4: CHECK THE PSCM FOR RETURNING DTCS 
   • PSCM_A connector connected. (C225A) Make sure the connector seats and latches correctly.
   • Ignition ON, engine OFF.
   • Clear the PSCM DTCs.
   • Ignition OFF.
   • Ignition ON, engine running.
   • Rotate the steering wheel through its full range of travel, lock-to-lock.
   • Drive the vehicle above 20 km/h (12 mph) for at least 5 minutes. Carry out the PSCM self-test.
   • Is DTC C1 B00:62 present in the PSCM?

   Yes	No
   INSTALL a new electronic steering actuator. REFER to the Power Steering article.	The condition causing the DTC is not present at this time and may have been caused by a loose or corroded electrical connector. ADDRESS the root cause of any connector or pin issues.