Dtc 9-1 (Iat Sensor Low Voltage) - Honda MUV700 big red Service Manual

FUEL SYSTEM (PGM·FI)
6-22
OTC 9·' (lAT SENSOR LOW VOLTAGE)
1. IAT Sensor System Inspection
Turn the ignition switch to ON (I).
Check the IAT sensor with the HDS pocket tester.
Is about 0 V indicated?
YES - GO TO STEP 2.
ND - Intermittent failure.
2. IAT Sensor Inspection
Turn the ignition switch to OFF (0 ).
Disconnect the IAT sensor 2P black connector.
Turn the ignition switch to ON
(I).
Check the IAT sensor with the HOS pocket tester.
Is about
0
V indicated?
YES - GO TO STEP 4.
NO - GO TO STEP 3.
3. IAT Sensor Resist ance Inspection
Turn the ignition switch OFF (0 ).
Measure the resistance between the IAT sensor
side connector terminals.
Standard : 2.2 - 2.7 kO (20"C/68~ F)
Is the resistance within standard value?
YES - Replace the PCM with a known good
one, and recheck.
NO - Faulty IAT sensor.
4. IAT Sensor Output line Short Circuit Inspection
Disconnect the PCM 33P gray connector.
Check for continuity between the wire harness
side IAT sensor 2P connector term inal and
ground.
Connection: Gray/ blue - ground
Is there continuity?
YES - Shan circuit in the Gray/blue wire.
NO - Replace the PCM wi th a known good
one and recheck.
tAT SENSOR 2P CONNECTOR
!Terminal side o f the sensor)
Q
tAT SENSOR 2P BLACK CONNECTOR
!Terminal side of the wire harness)
Gra y/blue
Q