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TROUBLESHOOTING
FUNCTION TEST USING THE Dr.H
1. Buzzer inspection
Turn the combination switch OFF and connect the Dr.H.
Test the warning buzzer using the Dr.H.
Does the buzzer sound?
YES – GO TO STEP 2.
NO – • Inspect the warning buzzer
• Inspect the combination switch
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
2. Alternator indicator light inspection
Test the alternator indicator light using the Dr.H.
Does the alternator indicator light blink?
YES – GO TO STEP 3.
NO – • Inspect the indicator light
• Repair the open circuit in the main wire harness
• Replace the ECM with a new one and recheck
3. MIL inspection
Test the MIL using the Dr.H.
Does the MIL blink?
YES – GO TO STEP 4.
NO – • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
4. Overheat indicator light inspection
Test the overheat indicator light using the Dr.H.
Does the overheat indicator light blink?
YES – GO TO STEP 5.
NO – • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
5. Oil indicator light inspection
Test the oil indicator light using the Dr.H.
Does the oil indicator light blink?
YES – Indicator light/warning buzzer is normal.
NO – • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
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