Honda BF40D Mode D'emploi page 449

3) CKP sensor 1 signal line open-circuit inspection
• Measure the voltage between the CKP sensor 1 3P
connector main wire harness side No.1
13
terminal (Blue) and the engine ground.
CKP SENSOR 1 3P CONNECTOR
MAIN WIRE HARNESS SIDE
VIEWED FROM THE TERMINAL SIDE
Is the measurement within 4.75 - 5.25V?
YES - Go to "4) CKP sensor 1 signal line short-
circuit inspection."
NO - Repair open in the main wire harness
between the ECM and the CKP sensor 1.
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 terminal (Blue) 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."
13
CRK1 (Blue)
13 main wire
CRK1 (Blue)
449
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
VIEWED FROM THE TERMINAL SIDE
Is there continuity?
YES - Go to "6) Guide plate inspection."
NO - Repair open in the main wire harness
between the ECM and the CKP sensor 1.
6) Guide plate inspection
• Check the guide plate.
Is the guide plate damaged?
YES - Replace the guide plate with a new one and
recheck.
NO - Replace the CKP sensor 1 with a new one
and recheck. If the MIL blinks 4 times again,
replace the ECM with a new one and recheck.
. Check for
9
13
PG3 (Black/Blue)
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