Honda CRF450R 2009 Service Manual page 163

5. TP Sensor Output Line Open Circuit Inspection
Turn the "ECM" selector switch OFF .
Disconnect the ECM 33P (Black) connector.
Check for continuity at the Yellow/green wire
between the TP sensor 3P (Blue) connector and
ECM 33P (Black) connector.
Connection : 33 - Yellow/green
TOOL:
Test probe, 2 pack
07ZAJ·RDJA110
Is there continuity?
YES - GO TO STEP 6.
NO - Open circuit in Yellow/green wire
6. TP Sensor Output Line Short Circuit Inspection
II
FUEL SYSTEM (PGM-FI)
3P(BlUE)CONNECTOR
(Wire side/female terminals)
! !
/33
®--
Y /G
33P (BLACK) CONNECTOR
(Wire side/female terminals)
Check for continuity between the TP sensor 3P , - - - - -- - -- - - - - - - -- - ,
(Blue) connector of the wire side and ground . 3P (BLUE) CONNECTOR
(Wire side/female terminals)
Connection : Yellow/green - Ground \
Is there continuity?
YES - Short circuit in Yellow/green wire
NO - GO TO STEP 7.
7. TP Sensor Inspection
Replace the throttle body with a known good one
(page 6-64).
Erase the OTC's (page 6-23).
Turn the "ECM" selector switch ON.
Check the TP sensor with the MCS.
Is OTC 8·1 indicated?
YES - Replace the ECM with a known good one,
and recheck.
NO - Faulty original throttle body (TP sensor)
OTe 8-2 (TP SENSOR HIGH VOLTAGE)
1, TP Sensor System Inspection
Connect the 12 V battery ("ECM" selector switch is
ON).
- '09: page 6-19
- After '09: page 6-19
Check the TP sensor with the MCS.
Is about 5 V indicated?
YES - GO TO STEP 3.
NO - GO TO STEP 2.
Y /G
6-31