Test MB: Output Test Mode Not Functioning: Testing

1) Check Scan Tool Connections

Turn ignition off. Inspect connection between scan tool and DLC for damaged or corroded pins. Inspect scan tool cables for damage. Repair or replace if necessary and run scan tool SYSTEM READINESS test to verify communication between scan tool and appropriate module. If cables and connections are okay, go to next step.

2) Check Scan Tool Power Supply

Inspect cables and connection between scan tool and vehicle battery power supply. Check for battery voltage at cigarette lighter. Inspect power connection at cigarette lighter. Repair as necessary and run scan tool SYSTEM READINESS test to verify communication between scan tool and appropriate module. If power supply and data connections are okay, operator error may be at fault. Ensure proper key sequence was used for outputs. Return to OUTPUT TEST MODE under ADDITIONAL SYSTEM FUNCTIONS.