Honda BF40D Mode D'emploi page 417

DTC 3-2: MAP sensor voltage is too high
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect the
MAP sensor 3P connector
again.
b. Clear the DTC (P. 5-12).
• Continue the procedure when the DTC does not
clear.
c. Turn the combination switch ON. Measure the MAP
sensor voltage using the HDS (Dr. H or pocket
tester).
Is there 0.23 - 4.5V?
YES - Temporary failure (Disappears.)
NO - Go to "2) MAP sensor signal line open-circuit
inspection."
2) MAP sensor signal line open-circuit inspection
a. Turn the combination switch OFF and disconnect
the MAP sensor 3P connector
b. Turn the combination switch ON. Measure the
voltage between the MAP sensor 3P connector
main wire harness side No.2 terminal (White/Red)
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 "3) MAP sensor GND line open-circuit
inspection."
NO - Repair open in the main wire harness
between the ECM and the MAP sensor.
once and connect it
3
.
3
3
3
PB (White/Red)
417
3) MAP sensor GND line open-circuit inspection
• Turn the combination switch OFF. Check for
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
3
SG1
(Green/Red)
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Go to "4) MAP sensor inspection."
NO - Repair open in the main wire harness
between the ECM and the MAP sensor.
4) MAP sensor inspection
a. Replace the MAP sensor and connect the MAP
sensor 3P connector 3
b. Turn the combination switch ON. Measure the MAP
sensor voltage using the HDS (Dr. H or pocket
tester).
Is the measurement within 2.76 - 2.96V?
YES - End of inspection
NO - Replace the ECM with a new one and
recheck.
.
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