Dtc 8-1 (Tp Sensor Low Voltage) - Honda TRX500FM Service Manual

PGM-FI SYSTEM
4-18
OTe 8-1 (TP SENSOR LOW VOLTAGE)
Before starting the inspection, check for loose or
poor contact on the sensor unit 5P (Black) connector
and PCMfECM 33P connectors, and recheck the
DTC.
1. TP Sensor System Inspection
Tum the ignition switch ON and engine stop switch
"0",
Check the TP sensor with the HDS pocket lester
with the throttle 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 the throttle is moved to fully
dosed position to fully open position. using the data
list menu of the HDS pockellester.
Does the voltage Increase continuously?
YES - Intermittent failure.
• Loose or poor contact of the sensor unit
SP (Black) connector.
NO - Faulty sensor unit (TP sensor),
3. TP Sensor Input Voltage Inspection
Tum the ignition switch OFF.
Disconnect the sensor unit 5P (Black) connector
[1J.
Tum the ignition switch
ON
and engine stop switch
"0".
Measure the voltage between the wire harness side
sensor unit 5P (Black) connector terminals.
Connection: Brown/white (+) - Greenfred (-)
/s the voltage within
4.75 - 5.25
V?
YES - GO
TO STEP 5.
NO - GO TO
STEP
4 .
4. TP
Sensor Input Line Open Circuit Inspection
Tum the ignition switch OFF.
Disconnect the PCM/ECM
33P
(Gray) connector
[1J.
Check for continuity between the wire harness side
sensor unit 5P (Black) connector
[2]
and PCMfECM
33P
(Gray) connector terminals.
Connection: B3 - Brown/white
TOOL:
Test probe
07ZAJ·RDJA110
Is there continuity?
YES - Replace the PCMIECM with a known good
one (page
4·34),
and recheck.
NO - Open circuit in the BrownlWhite wire.
Brownlwhite Green/ted
[1)
111
121
.3
Brown/white