B0605

CIRCUIT DESCRIPTION
The Power Steering Control Module (PSCM) calibrations are stored in the EEPROM (Electronically Erasable Programmable Read Only Memory). The PSCM performs internal tests on the EEPROM and will indicate if any calibration faults (checksum errors) are current.

DTC B0605 WILL SET WHEN
If no calibrations were programmed in the PSCM memory, or when an internal calibration failure (check-sum error) is detected by the PSCM, a code will set.

ACTION TAKEN WHEN THE DTC SETS
The PSCM will not send any current to the power steering fluid flow actuator. This will result in the power steering fluid flow actuator valve to retract providing maximum fluid flow at all times

CONDITIONS FOR CLEARING THE DTC
After the ignition is cycled no internal calibration faults (checksum errors) are indicated by the PSCM, or when the PSCM is properly programmed.

DIAGNOSTIC AIDS
The EEPROM is not removable from the Power Steering Control Module (PSCM). If service is required, the module must be replaced.


TEST DESCRIPTION
The numbers below refer to the step numbers on the EEPROM Checksum Error Diagnostic Table.
- Step 1 makes sure the "Diagnostic System Check" is completed.
- Step 2 checks if the PSCM was previously replaced.
- Step 3 indicates the PSCM Calibration must be complete.
- Step 4 checks for a valid EEPROM I/D number stored.
- Step 5 indicates PSCM replacement is required.