Honda BF40D Mode D'emploi page 419

4) CKP sensor 1 signal line short-circuit inspection
• Turn the combination switch OFF. Disconnect the
ECM connector A . Check for continuity between
9
the CKP sensor 1 3P connector
harness side No.1 (Blue) terminal and the engine
ground.
CKP SENSOR 1 3P CONNECTOR
MAIN WIRE HARNESS SIDE
13
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Repair short in the main wire harness
between the ECM and the CKP sensor 1.
NO - Go to "5) CKP sensor 1 GND line open-circuit
inspection."
5) CKP sensor 1 GND line open-circuit inspection
• Connect the ECM connector A
continuity between the CKP sensor 1 3P connector
main wire harness side No.2 (Black/Blue)
13
terminal and the engine ground.
CKP SENSOR 1 3P CONNECTOR
MAIN WIRE HARNESS SIDE
13
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Go to "6) CKP sensor 1 inspection."
NO - Repair open in the main wire harness
between the ECM and the CKP sensor 1.
6) CKP sensor 1 inspection
a. Replace the CKP sensor 1 and connect the CKP
sensor 1 3P connector
b. Start the engine and check the DTC using the HDS
(Dr. H or pocket tester).
Does the DTC 4-1 appear?
YES - Replace the ECM with a new one and
recheck.
NO - End of inspection
main wire
13
CRK1 (Blue)
. Check for
9
PG3 (Black/Blue)
.
13
419
DTC 4-2: CKP sensor 1 pulse is abnormal
1) Symptom reproduction test
a. Turn the combination switch OFF. Disconnect the
CKP sensor 1 3P connector
it again.
b. Clear the DTC (P. 5-12).
• Continue the procedure when the DTC does not
clear.
c. Start the engine and check the DTC using the HDS
(Dr. H or pocket tester).
Does the DTC 4-2 appear?
YES - Go to "2) Guide plate inspection."
NO - Temporary failure (Disappears.)
2) Guide plate inspection
• Inspect the guide plate.
Is the guide plate damaged?
YES - Replace the guide plate with a new one and
recheck.
NO - Go to "3) CKP sensor 1 inspection."
3) CKP sensor 1 inspection
a. Replace the CKP sensor 1 and connect the CKP
sensor 1 3P connector
b. Start the engine and check the DTC using the HDS
(Dr. H or pocket tester).
Does the DTC 4-2 appear?
YES - Replace the ECM with a new one and
recheck.
NO - End of inspection
once and connect
13
.
13
5-24