TOHATSU 200 Series Service Manual page 99

dummyhead dummyhead
MIL BLINKS 23 TIMES (2 LONG
BLINKS AND 3 SHORT BLINKS)
KNOCK SENSOR
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the knock sensor 1P connector
ECM connector B
Reset the ECM (page 5-2).
Start the engine and let it run at 3,000 min
5 minutes or more under no load until the engine
temperature is over 85 °C (185 °F).
Lower the engine speed gradually and run it at
3,000 – 4,000 min
Turn the combination switch OFF and connect the
SCS service connector.
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blink 23 times?
YES
NO
2. Knock sensor line open or short circuit
inspection
Turn the combination switch OFF.
Disconnect the knock sensor 1P connector
and ECM connector B
Check for continuity through the Knock sensor wire.
Is the knock sensor line correct?
YES
NO
3. Knock sensor inspection
Replace the knock sensor with a new one and
connect the knock sensor 1P connector
Turn the combination switch ON and check the
number of blinks of the MIL.
Does the MIL blinks 23 times?
YES
NO
, switch wire 6P connector
and then reconnect them.
-1 (rpm) for 10 seconds.
– GO TO STEP 2.
– Temporary failure (code
reappear).
.
– GO TO STEP 3.
– Repair open or short in the main wire
harness between the ECM and knock
sensor.
– Replace the ECM with a new one and
recheck.
– Faulty original knock sensor. End of
inspection.
,
-1 (rpm) for
does not
.
FUEL SYSTEM
5-43