Cruise Control (ECM/PCM) Input Test

Cruise Control (ECM) Input Test

NOTE: Always make sure you have the latest HDS software before doing the input tests.

1. Connect the HDS to the DLC.

2. Turn the ignition switch to ON (II).

3. Make sure the HDS communicates with the vehicle and the ECM. If it does not communicate, troubleshoot the DLC circuit Testing and Inspection.

4. Go to PGM-FI, and check for DTCs Initial Inspection and Diagnostic Overview.

5. Do the following tests while monitoring parameters in the PGM-FI DATA LIST with the HDS.

6. If the input tests OK, replace the ECM.

NOTE: Intermittent failures are often caused by loose circuit connections. While monitoring cruise control inputs, flex the circuit wires, and note if any of the test results change.