TOHATSU BFT115A Service Manual page 141

2. MAP sensor signal line short circuit inspection
Turn the combination switch OFF and disconnect
the MAP sensor 3P connector
Turn the combination switch ON.
Measure the voltage between the MAP sensor 3P
connector main wire harness side No.2
30
(White/Red) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES – GO TO STEP 3.
NO – Repair short in the White/Red wire. If the
main wire harness is normal, replace the
ECM with a new one and recheck.
3. MAP sensor power line open circuit inspection
Measure the voltage between the MAP sensor 3P
connector main wire harness side No.1
30
(Brown/Yellow) terminal and engine ground.
Is the measurement within 4.75 – 5.25 V?
YES – Replace the MAP sensor with a new one
and recheck.
NO – Repair open in the Brown/Yellow wire. If
the main wire harness is normal, replace
the ECM with a new one and recheck.
DTC 3-2 (MAP SENSOR VOLTAGE IS TOO HIGH)
1. Symptom reproduction test
Turn the combination switch OFF.
Disconnect the MAP sensor 3P connector
ECM connector A
12
, and then reconnect them.
13
Clear the DTC (page 5-6).
• Continue the procedure if the DTC does not
clear.
Turn the combination switch ON.
Measure the MAP sensor voltage using the HDS.
Is the measurement within 0.23 – 4.49 V?
YES – Temporary failure
reappear)
NO – GO TO STEP 2.
.
30
,
30
, and ECM connector B
(code does not
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
30
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
30
FUEL SYSTEM
PB
(White/Red)
VCC1
(Brown/Yellow)
5-23