TOHATSU BFT75A Service Manual page 130

dummyhead dummyhead
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
NO
2. Alternator indicator light inspection
Test the alternator indicator light using the Dr.H.
Does the alternator indicator light blink?
YES
NO
3. MIL inspection
Test the MIL using the Dr.H.
Does the MIL blink?
YES
NO
4. Overheat indicator light inspection
Test the overheat indicator light using the Dr.H.
Does the overheat indicator light blink?
YES
NO
5. Oil indicator light inspection
Test the oil indicator light using the Dr.H.
Does the oil indicator light blink?
YES
NO
– GO TO STEP 2.
– • 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
– GO TO STEP 3.
– • Inspect the indicator light
• Repair the open circuit in the main wire harness
• Replace the ECM with a new one and recheck
– GO TO STEP 4.
– • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
– GO TO STEP 5.
– • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
– Indicator light/warning buzzer is normal.
– • Inspect the indicator light
• Repair the open or short circuit in the main wire harness
• Replace the ECM with a new one and recheck
TROUBLESHOOTING
4-17