Honda BF40D Mode D'emploi page 421

DTC 6-2: EBT sensor voltage is too high
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect the
EBT sensor 2P 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 EBT
sensor voltage using the HDS (Dr. H or pocket
tester).
Is the measurement within 0.078 - 4.92V?
YES - Temporary failure (Disappears.)
NO - Go to "2) EBT sensor signal line open-circuit
inspection."
2) EBT sensor signal line open-circuit inspection
a. Turn the combination switch OFF and disconnect
the EBT sensor 2P connector
b. Turn the combination switch ON. Measure the
voltage between the EBT sensor 2P connector
main wire harness side No.1 (Red/White) terminal
and the engine ground.
EBT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
17
VIEWED FROM THE TERMINAL SIDE
Is the measurement within 4.30 - 5.25V?
YES - Go to "3) EBT sensor GND line open-circuit
inspection."
NO - Repair open in the main wire harness
between the ECM and the EBT sensor.
3) EBT sensor GND line open-circuit inspection
once and connect it
17
.
17
4) EBT sensor inspection
17
TE (Red/White)
421
• Turn the combination switch OFF. Check for
continuity between the EBT sensor 2P connector
main wire harness side No.2 (Green/Red)
17
terminal and the engine ground.
EBT SENSOR 2P CONNECTOR
MAIN WIRE HARNESS SIDE
17
SG2
(Green/Red)
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Go to "4) EBT sensor inspection."
NO - Repair open in the main wire harness
between the ECM and the EBT sensor.
a. Remove the EBT sensor and connect the EBT
sensor 2P connector .
17
b. Turn the combination switch ON. Measure the
sensor temperature using the HDS (Dr. H or pocket
tester).
Does the measurement correspond to the ambient
temperature?
YES - Replace the ECM with a new one and
recheck.
NO - Replace the EBT sensor with a new one and
recheck.
5-26