Honda TRX680FA Service Manual page 139

FUEL SYSTEM (PGM-FI)
DTC 8-1 (TP SENSOR LOW VOLTAGE)
• Before starting the inspection, check for loose or
poor contact on the MAP/TP sensor 5P (Black)
connector and recheck the DTC.
1. TP Sensor System Inspection
Turn the ignition switch ON and engine stop
switch "o".
Check the TP sensor with the HDS 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 is increasing
uninterrupted when moving the throttle from
fully closed to fully opened using the data list
menu of the HDS pocket tester.
Does the voltage increase continuously?
YES - • Intermittent failure.
• Loose or poor contact on the MAP/TP
sensor connector
NO - Faulty TP sensor.
3. TP Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the MAP/TP sensor 5P (Black) con-
nector.
Turn the ignition switch ON and engine stop
switch "O"-
Measure the voltage at the wire harness side ter-
minals.
Connection: Brown (+) - Green/red (-)
to the voltage within 4.75 - 5.25 V?
YES - GO TO STEP 5.
NO - G O TO STEP 4.
4. TP Sensor Circuit Inspection
Turn the ignition switch OFF.
Disconnect the PCM 33P (Gray) connector.
Check for continuity at the Brown wire between
the MAP/TP sensor 5P (Black) connector terminal
and the PCM 33P (Gray) connector terminal.
TOOL:
Test probe 07ZAJ-RDJA110
Connection: B3 - Brown
Is there continuity?
YES - Replace the PCM with a known good
one, and recheck
NO - Open circuit in Brown wire
MAP/TP SENSOR 5P (BLACK) CONNECTOR
(Wire side of female terminal)
MAP/TP SENSOR 5P (BLACK) CONNECTOR
(Wire side of female terminal)
B3
[
[ i — i \ :
—
-—i
i
j
1
' ' ' ' '
Br
7
PCM 33P (GRAY) CONNECTOR
(Wire side of female terminal)
6-23