Honda BF40D Mode D'emploi page 447

3) MAP sensor signal line open-circuit inspection
• Measure the voltage between the MAP sensor 3P
connector main wire harness side No.2
3
(White/Red) terminal and the engine ground.
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
VIEWED FROM THE TERMINAL SIDE
Is the measurement within 4.30 - 5.25V?
YES - Go to "4) MAP sensor signal line short-circuit
inspection."
NO - Repair open in the main wire harness
between the ECM and the MAP sensor.
4) MAP sensor signal line short-circuit inspection
• Turn the combination switch OFF. Disconnect the
ECM connector A . Check for continuity between
9
the MAP sensor 3P connector
harness side No.2 (White/Red) terminal and the
engine ground.
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Repair short in the main wire harness
between the ECM and the MAP sensor.
NO - Go to "5) MAP sensor GND line open-circuit
inspection."
3
PB (White/Red)
main wire
3
3
PB (White/Red)
447
5) MAP sensor GND line open-circuit inspection
• Connect the ECM connector A
continuity between the MAP sensor 3P connector
main wire harness side No.3 (Green/Red)
3
terminal and the engine ground.
MAP SENSOR 3P CONNECTOR
MAIN WIRE HARNESS SIDE
SG1
(Green/Red)
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Replace the MAP sensor with a new one and
recheck. If the MIL blinks 3 times again,
replace the ECM with a new one and recheck.
NO - Repair open in the main wire harness
between the ECM and the MAP sensor.
. Check for
9
3
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