Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC C0895 03: Device Voltage Below Threshold - PSCMDTC C0895 11: Device Voltage Above Maximum Threshold - PSCM
DTC C0895 12: Device Voltage Below Minimum Threshold - PSCM
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | C0895 00 | C0895 00 | -- | -- |
Ground | -- | C0895 00 | -- | -- |
Typical Scan Tool Data
Circuit | Short to Ground | Open | Short to Voltage |
|---|---|---|---|
Operating Conditions: Ignition ON, Engine OFF. Parameter Normal Value: 12.60 Volts | |||
B+ | 0.00 Volts | 0.00 Volts | 12.60 Volts |
Circuit/System Description
Voltage is supplied to the power steering control module (PSCM) by the battery positive (B+) voltage circuit. The PSCM monitors the supplied voltage to determine if it is within a valid operating range. Damage to components, and incorrect data may occur if the voltage is out of range. The PSCM disables all outputs, and sets DTC C0895 if high or low battery voltage is detected.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
Battery voltage is outside the normal range of 9.0-15.5 volts.
Action Taken When the DTC Sets
The PSCM disables all functionality.
Conditions for Clearing the DTC
| • | A current DTC will clear when the PSCM receives battery voltage in the normal range of 9-15.5 volts. |
| • | A history DTC will clear if the condition does not return after 50 consecutive ignition cycles. |
Diagnostic Aids
| • | A high or low voltage value in multiple modules indicates a concern in the charging system. |
| • | Overcharging with a battery charger or jump starting can cause this DTC to set. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
- Observe the scan tool PSCM Battery Voltage Signal parameter. The reading should be between 12.6 and 15.0 volts.
| ⇒ | If not within the specified range, refer to Charging System Test . |
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at the PSCM.
- Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the ground circuit terminal 2 X1 and ground.
- Verify that a test lamp illuminates between the B+ circuit terminal 1 X1 and ground.
- If all circuits test normal, replace the PSCM.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PSCM replacement, setup and programming.
