Dtc 8-1 (Tp Sensor Low Voltage) - Honda 2010 CRF250R Service Manual

DTC 8-1 (TP SENSOR LOW VOLTAGE)
Before starting the inspection. check for loose or
poor contact on the TP sensor 3P (Blue) connector
and ECM 33P connector, then recheck the DTG.
1. TP Sensor System Inspection
Connect the 12 V battery ("ECM" selector switch is
ON)
(page
5-12).
Check the TP sensor with the HOS when the throttle
is fully closed.
Is about 0 V indicated?
YES - GO TO STEP 3.
NO - GO TO STEP 2.
2. TP Sensor Inspection
Check that the TP sensor voltage increases
continuously when moving Ihe throttle from fully
closed to fully opened using the data list menu of the
HOS.
Does th e voltage increase continuously?
YES - Intermittent failure
NO - Faulty TP sensor
3. TP Sensor Input Voltage Inspection
Turn the "ECM" selector switch OFF.
Disconnect the TP sensor 3P (Blue) connector.
Turn the "ECM* selector switch ON.
Measure the voltage at the wire side.
Connection : Red /yellow (+) - Green/red (- )
Is the voltage with in 4.75 - 5.25 V?
YES - GO TO STEP 5.
NO - GO TO STEP 4 .
4.
TP Sensor Circuit Inspection
Turn the "ECM
n
selector switch OFF.
Disconnect the ECM 33P (Black) connector.
Check for continuity at the Red/yellow wire between
the TP sensor 3P (Blue) connector and ECM 33P
(Black) connector.
Connection : 14 - Redlyellow
TOOL
Tes t probe
Is there continuity?
07ZAJ· RDJA 110
YES - Replace the ECM with a known good one.
and recheck.
NO - Open circuit in Red/yellow wire
FUEL SYSTEM (PGM-FI)
3P (BLUE) CONNECTOR
(Wire side/female terminals)
3P(BlUE)CONNECTO~
(Wire side/femate terminals)
I
14
33P (BLACK) CONNECTOR
(Wire side/female terminats)
Q
RJY
5-21