TOHATSU 200 Series Service Manual page 69

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DTC 4-1, 4-2 (NO CKP SENSOR PULSE
OR ABNORMAL CKP SENSOR PULSE)
(*) Refer
(BF175AK1·200AK1·225AK1: 62ZY300).
DTC 4-1 (NO CKP SENSOR PULSE)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the CKP sensor 2P connector
ECM connector A
Clear the DTC (page 5-2).
• Continue the procedure if the DTC does not
Start the engine and check the DTC using the HDS.
Does the DTC 4-1 appear?
YES
NO
2. CKP sensor inspection
Turn the combination switch OFF.
Inspect the CKP sensor (page 5-131*).
Is the CKP sensor correct?
YES
NO
DTC 4-2 (ABNORMAL CKP SENSOR PULSE)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the CKP sensor 2P connector
ECM connector A
Clear the DTC (page 5-2).
• Continue the procedure if the DTC does not
Start the engine and check the DTC using the HDS.
Does the DTC 4-2 appear?
YES
NO
2. CKP sensor installation inspection
Turn the combination switch OFF.
Inspect the CKP sensor installation (page 5-106*).
Is the CKP sensor installed correctly?
YES
NO
to page of base
and then reconnect them.
clear.
– GO TO STEP 2.
– Temporary failure
reappear).
– Repair the open or short circuit in the CKP
sensor harness between the CKP sensor
and ECM. If the main wire harness is
correct, replace the ECM with a new one
and recheck.
– Replace the CKP sensor with a new one
and recheck.
and then reconnect them.
clear.
– GO TO STEP 2.
– Temporary failure
reappear).
– GO TO STEP 3.
– Install the CKP sensor correctly and
recheck.
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FUEL SYSTEM
5-13