PGM-FI SYSTEM
4-32
DTC 52-1 (CKP SENSOR)
• Before starting the inspection, check for loose or
poor contact
on
the CKP sensor
6P
(Black)
connector and
ECM
3P (Black) connector and
recheck the
OTC.
1.
Recheck
DTC
Clear the DTC's (page 4-12).
Start the engine and recheck the
OTC.
Is the
DTC
52-1 indicated?
YES -
GO
TO
STEP
2.
NO - • Intermittent failure
• Loose or poor contact
on
the CKP
sensor
6P
(Black) connector
• Loose or poor contact
on
the ECM
3P
(Black) connector
2. CKP Sensor Circuit Inspection
Turn the ignition switch OFF.
Disconnect the CKP sensor 6P (Black) connector.
Check the connector for loose contacts or corroded
terminals.
Measure the voltage at the CKP sensor
6P
(Black)
connector
[1]
of the wire harness side.
CONNECTION: White/red (+) - Ground
(-)
White/blue(+) - Ground
(-)
White/black(+) -
Ground(-)
Blue/yellow(+) - Ground
(-)
STANDARD:
5-10
V
CONNECTION: Brown/black(+) - Blue/green
(-)
STANDARD: Battery voltage
Does the standard voltage exist?
YES -
GO
TO
STEP
3.
NO - Open circuit
in
wire harness between the
ECM and CKP sensor connector
3. CKP Sensor Inspection
Replace the CKP sensor with a known good one
(page 14-4
).
Clear the DTC's (page 4-12).
Start the engine and warm it up.
Test-ride the scooter and recheck the
OTC.
Is the DTC 52-1 indicated?
YES - Replace the ECM with a known good one
and recheck.
NO - Faulty original CKP sensor
White/blue
[1]
[1]
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