Displaying & Reading Trouble Codes
ELECTRIC POWER STEERING (EPS) ON-BOARD DIAGNOSISOn-Board Diagnostic (OBD) Test Description
^ The OBD test inspects the integrity and function of the EPS and outputs the results when requested by the specific tests.
^ On-board diagnostic test also:
- Provides a quick inspection of the EPS usually performed at the start of each diagnostic procedure.
- Provides verification after repairs to ensure that no other faults occurred during service.
^ The OBD test is divided into 3 tests:
- Read/clear diagnostic results, PID monitor and record and active command modes.
Read/clear diagnostic results
^ This function allows reading or clearing of DTCs in the EPS control module memory.
PID/Data monitor and record
^ This function allows access of certain data values, input signals, calculated values, and system status information.
Active command modes
^ This function allows control of devices through the WDS or equivalent.
Reading DTCs Procedure
1. Connect the WDS or equivalent to the vehicle DLC-2 connector.
2. Retrieve DTCs using the WDS or equivalent.
Clearing DTCs Procedure
1. After repairs have been made, perform the Reading DTCs Procedure.
2. Clear DTCs using the WDS or equivalent.
3. Verify that the customer's concern has been resolved.
PID/Data Monitor and Record Procedure
1. Connect the WDS or equivalent to the vehicle DLC-2 connector.
2. Access and monitor PIDs using the WDS or equivalent.
Active Command Modes Procedure
1. Connect the WDS or equivalent to the vehicle DLC-2 connector.
2. Activate active command modes using the WDS or equivalent.