Scan Tool Inoperative
- Perform DIAGNOSTIC SYSTEM CHECK .
- Ensure scan tool is operating correctly by connecting scan tool to a different vehicle. If scan tool is functioning properly, return to original vehicle and go to next step. If scan tool is malfunctioning, refer to scan tool owners manual.
- Ensure ignition is OFF. Connect a test lamp between DLC terminal No. 16 and ground. If the test lamp lights, go to next step. If the test light does not light, go to step 6.
- Connect a test lamp between DLC terminal Nos. 16 and 4, then between DLC terminal Nos. 16 and 5. If the test lamp lights on both tests, go to next step. If the test lamp does not light on either test, go to step 7.
- Inspect the DLC power and ground circuits for intermittent or poor connections. Perform DIAGNOSTIC SYSTEM CHECK .
- Repair open in the Orange 840 circuit wiring between the AUX POWER fuse and the DLC. Perform DIAGNOSTIC SYSTEM CHECK .
- Repair open in the Black 150 circuit or the Black/White 451 circuit wiring between ground and the DLC. Perform DIAGNOSTIC SYSTEM CHECK .