TOHATSU BFT250A Service Manual page 160

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FUEL SYSTEM
2. HO2S heater inspection
Turn the combination switch OFF.
Inspect the HO2S heater (page 5-126).
Is the HO2S heater correct?
YES
NO
DTC 58-1, 58-2 (NO CMP 2 SENSOR PULSE OR ABNORMAL SENSOR PULSE)
ECM
TDC2P
TDC2M
DTC 58-1 (NO CMP SENSOR PULSE)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the CMP sensor 4P connector
ECM connector A
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Start the engine and check the DTC using the HDS.
Does the DTC 58-1 appear?
YES
NO
5-38
– Repair open in the main wire harness
between the No.10 fuse and the HO2S or
between the HO2S and ECM. If the main
wire harness is correct, replace the ECM
with a new one and recheck.
– Replace the HO2S with a new one and
recheck.
Y
Bl
and then reconnect them.
– GO TO STEP 2.
– Temporary failure (code
reappear).
Y
Bl
,
does not
CMP 2
SENSOR
Y
Bl
Bl: Black Br: Brown
Y: Yellow O: Orange
Bu: Blue Lb: Light blue
G: Green Lg: Light green
R: Red P: Pink
W: White Gr: Gray