Honda TRX680FA Service Manual page 143

FUEL SYSTEM (PGM-FI)
3. IAT Sensor Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the PCM 33P (Gray) connector.
Check for continuity at the Gray/blue and Green/
red wire between the IAT sensor 2P (Black) con-
nector terminals and the PCM 33P (Gray) con-
nector terminals.
TOOL:
Test probe 07ZAJ-RDJA110
Connection: B2 - Green/red
B26- Gray/blue
te there continuity?
YES - Replace the PCM with a known good
one, and recheck.
NO - • Open circuit in Gray/blue wire
• Open circuit in Green/red wire
DTC 11-1 (REAR VS SENSOR NO
SIGNAL)
• Before starting the inspection, check for loose or
poor contact on the rear VS (Vehicle Speed) sen-
sor 3P (Yellow) connector and recheck the DTC.
1. Rear VS Sensor System Inspection
Test-ride the vehicle and check the rear VS sen-
sor with HDS pocket tester.
Is vehicle speed indicated normally?
YES - Intermittent failure.
NO - GO TO STEP 2.
2. Rear VS Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the rear VS sensor 3P (Yellow) con-
nector (page 23-9).
Turn the ignition switch ON and engine stop
switch "O".
Measure the voltage at the rear VS sensor con-
nector terminals of the wire harness side.
Connection: Black/pink (+) - Green (-)
Is there battery voltage?
NO - • Open or short circuit in the Black/
pink wire.
• Open circuit in the Green wire.
YES - GO TO STEP 3.
IAT SENSOR 2P(
(Wire side of fern
B2
B26 \
i Vi j \
i i i
r
I
BLACK) CONNECTOR
ale terminal) /
^ ^ ^ G/R/
I
J
(3D
' -2 1 ' Gr/Bu
PCM 33P (GRAY) CONNECTOR
(Wire side of female terminal)
REAR VS SENSOR 3P (YELLOW) CONNECTOR
(Wire side of male terminal)
Bl/P
6-27