Honda Transalp XL700V Manual page 175

FUEL SYSTEM (PGM-FI)
2. IAT Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the IAT sensor 2P (Gray) connector.
Turn the ignition switch ON and engine stop
switch " ".
Measure the voltage at the wire harness side of
IAT sensor connector.
Connection: Gray/blue (+) – Green/orange (–)
Is the voltage within 4.75 – 5.25V?
YES
NO
3. IAT Sensor Resistance Inspection
Turn the ignition switch OFF.
Measure the resistance at the IAT sensor termi-
nals (at 20°C/68°F).
Standard: 1 – 4 kΩ (20°C/68°F)
Is the resistance within 1 – 4 k Ω ?
NO
YES
4. IAT Sensor Open Circuit Inspection
Turn the ignition switch OFF.
Check for continuity between the IAT sensor 2P
(Gray) connector and the test harness terminals.
Connection: Gray/blue – B29
Is there continuity?
YES
NO
5. IAT Sensor Output Line Short Circuit Inspection
Check for continuity between the IAT sensor 2P
(Gray) connector and ground.
Connection: Gray/blue – ground
Is there continuity?
YES
NO
5-44
– GO TO STEP 3.
– GO TO STEP 4.
– Faulty IAT sensor
– GO TO STEP 4.
Green/orange – A18
– GO TO STEP 5.
– • Open circuit in Gray/blue wire
• Open circuit in Green/orange wire
– Short circuit in Gray/blue wire
– Replace the ECM with a new one, and
recheck; for Key Registration Proce-
dures (page 21-4).
IAT SENSOR 2P (GRAY) CONNECTOR
(Wire side/female terminal)
Gr/Bu
G/O
IAT SENSOR 2P (GRAY) CONNECTOR
(Sensor side/male terminal)
2P (GRAY) CONNECTOR
Gr/Bu
G/O
IAT SENSOR 2P (GRAY) CONNECTOR
(Wire side/female terminal)
Gr/Bu
IAT SENSOR 2P (GRAY) CONNECTOR
(Wire side/female terminal)
B28
A18