Dtc 7-1 (Ect Sensor Low Voltage) - Honda TRX500FM Service Manual

PGM·FI SYSTEM
4. MAP Sensor Output Line Open Circuit
Inspection
Tum the ignition switch OFF.
Disconnecllhe PCM/ECM 33P (Gray) connector [1].
Check for con tinuity between the wire harness side
sensor unit
5P
(Black) connector (2) and PCM/ ECM
33P (Gray) connector terminals.
Connection : B25 - Ught green
TOOL:
Test probe
07ZAJ·RDJA 110
Is th ere continuity?
YES - Replace the PCMfECM with a known good
one (page
4-34).
and recheck.
NO - Open circuit in the Ught green wire.
DTC 7·1 (ECT SENSOR LOW
VOLTAGE)
1. EeT Sensor System Inspection
Tum the Ignition switch ON and engine stop switch
·0··
Check the
Eer
sensor with the HDS pocket tester.
Is about 0 V Indfcated?
YES - GO TO STEP 2.
NO - Intermittent fail ure.
2. Eel Sensor Inspection
Tum the ignition switch OFF .
Disconnect the ECT sensor 2P (Black) connector,
Tum the ignition switch ON and engine stop sWitch
·0·,
Check the ECT sensor with the HOS pocket tester.
Is about
0
V indicated?
YES - GO TO
STEP
3.
NO - Faulty ECT sensor.
3. ECT Sensor Output Line Short Circuit Inspection
.25
(1(
(2(
Tum the ignition switch OFF, , - -- -- - - - - - - - - - - - - ,
4-16
Disconnect the PCM/ECM 33P (Gray) connector.
Check for continuity between the wire hamess side
ECT sensor 2P (Black) connector 11) terminal and
ground .
Connection: Black/blue - Ground
Is there continuity?
YES -
Short circuit in the Black/blue wire.
NO - Replace the PCM/ECM with a known good
one (page 4·34), and recheck.
Blacklblue
(1(