TOHATSU 200 Series Service Manual page 56

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TROUBLESHOOTING
WARNING BUZZER SOUNDS CONTINUOUSLY
THE OVERHEAT INDICATOR LIGHT GOES OFF AND OIL INDICATOR LIGHT GOES OFF OR BLINKS
(*) Refer to page of base shop manual (BF175AK1·200AK1·225AK1: 62ZY300).
1. MIL inspection
Check to see if the MIL stays on.
Does the MIL stay ON?
YES
NO
2. Oil level inspection
Stop the engine and check the oil level.
Is the oil level at the proper level?
YES
NO
3. Oil indicator light inspection 1
Let the engine idle.
Check the oil indicator light and buzzer.
Does the oil indicator light come ON and warning buzzer stop sounding?
YES
NO
4. Oil indicator light inspection 2
Snap the engine (4,000 min
Does the oil indicator light come ON and warning buzzer stop sounding?
YES
NO
5. Oil indicator light inspection 3
Disconnect the switch wire 6P connector
Turn the combination switch ON and check the oil indicator light and buzzer.
Does the oil indicator light come ON and warning buzzer stop sounding?
YES
NO
6. Oil Pressure inspection
Turn the combination switch OFF and connect the switch wire 6P connector
Reset the ECM following:
– Using the HDS (page 5-3)
– Without using the HDS (page 5-3)
Check the oil pressure (page 12-13*).
Is the oil pressure within specification?
YES
NO
7. EOP (LOW) switch inspection
Replace the EOP (Low) switch.
Check the oil indicator light and buzzer.
Does the oil indicator light come ON and the buzzer stop sounding?
YES
NO
4-8
– Perform PGM-FI troubleshooting (page 5-6*)
– GO TO STEP 2.
– GO TO STEP 3.
– Adjust the oil level.
– GO TO STEP 4.
– GO TO STEP 5.
-1 (rpm) or above under load) and check the oil indicator light and buzzer.
– Temporary failure (disappears)
– GO TO STEP 5.
– GO TO STEP 6.
– Short circuit in EOP switch (LOW) and ECM.
– GO TO STEP 7.
– • Oil filter cartridge is clogged
• Oil strainer is clogged
• Faulty oil pump
• Oil passage is clogged
– Faulty original EOP (Low) switch.
– Replace the ECM with a new one and recheck.
.
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