Honda CBF600SA Service Manual page 140

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys.
FUEL SYSTEM (PGM-FI)
DTC 9-1 (IAT SENSOR LOW VOLTAGE)
• Before starting the inspection, check for loose or
poor contact on the IAT sensor 2P (Gray) connec-
tor and ECM 33P connectors, then recheck the
DTC.
1. IAT Sensor System Inspection
Turn the ignition switch ON and engine stop
switch "
Check the IAT sensor with the HDS pocket tester.
Is about 0 V indicated?
YES
NO
2. IAT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the IAT sensor 2P (Gray) connector.
Turn the ignition switch ON and engine stop
switch "
Check the IAT sensor with the HDS pocket tester.
Is about 0 V indicated?
YES
NO
3. IAT Sensor Output Line Short Circuit Inspection
Turn the ignition switch OFF.
Check for continuity between the IAT sensor 2P
(Gray) connector terminal of the wire harness
side and ground.
CONNECTION: Gray/blue – Ground
Is there continuity?
YES
NO
5-26
email: info@motomatrix.co.uk
".
– GO TO STEP 2.
– Intermittent failure
".
– GO TO STEP 3.
– Faulty IAT sensor
– Short circuit in Gray/blue wire
– Replace the ECM with a known good
one, and recheck; refer to Key Registra-
tion Procedures (page 21-6)
2P (Gray) CONNECTOR
Gray/blue
2P (Gray) CONNECTOR
(Wire side/female terminals)