Circuit Description
The speed sensitive power steering (SSPS) module checks the system voltage to make sure that the voltage stays within the proper range. Damage to components, and incorrect input can occur when the voltage is out of range. The SSPS module monitors the system voltage over an extended length of time. If the SSPS module detects an excessively low system voltage, DTC C1104 will set.
Conditions for Running the DTC
| • | The vehicle speed is above 8 km/h (5 mph). |
| • | The system voltage is between 9-16 volts. |
Conditions for Setting the DTC
The SSPS control module detects a system voltage below 10 volts for 5 seconds.
Action Taken When the DTC Sets
| • | The SSPS warning light will illuminate. |
| • | Power steering assist will default to partial steering assist. |
| • | The SSPS control module will store a DTC C1105 in memory. |
Conditions for Clearing the DTC
| • | The SSPS warning lamp will turn OFF when conditions for the fault are no longer present. |
| • | Use a scan tool in order to clear the DTC. |
Diagnostic Aids
Check for the following conditions if a history or intermittent DTC is indicated.
| • | A poor connection at the SSPS control module. Inspect the harness connectors for backed out terminals, improper mating, improperly formed or damaged terminals, and poor terminal to wire connections. |
| • | A damaged wiring harness. Inspect the wiring harness for damages, if the wiring harness appears to be in good condition, observe the display on the DMM while moving the connectors and wiring harnesses related to the actuator. A change in the DMM display during the test will indicate the location of the fault. |
| • | For additional information, refer to Testing for Intermittent Conditions and Poor Connections . |
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Steering Assist Schematics Connector End View Reference: Steering Assist Connector End Views | |||
1 | Did you perform the Variable Effort Steering Diagnostic System Check? | Go to Step 2 | |
2 |
Did the DTC fail this ignition? | Go to Step 3 | System OK |
3 | Test for an open or poor connection on the ground circuit of the SSPS control module. Refer to Testing for Continuity and Wiring Repairs in Wiring Systems. Did you find and correct the condition | Go to Step 7 | Go to Step 4 |
4 | Test for a poor connection on the ignition circuit of the SSPS control module. Refer to Testing for Continuity and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 5 |
5 | Test for a poor connection at the SSPS control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
6 | Replace the SSPS control module. Refer to Power Steering Control Module Replacement . Did you complete the replacement? | Go to Step 7 | -- |
7 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
