Honda CBR650F Service Manual page 103

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PGM-FI SYSTEM
DTC 7 (ECT SENSOR)
Probable cause
• Open or short circuit in Pink/white wire between the
ECT sensor and ECM
• Open circuit in Green/yellow wire between the ECT
sensor and ECM
• Faulty ECT sensor
• Faulty ECM
DTC 7-1 (ECT SENSOR LOW VOLTAGE)
1. ECT Sensor System Inspection
Check the ECT sensor with the MCS.
Is about 0 V indicated?
YES
NO
2. ECT Sensor System Inspection with Connector
Disconnected
Turn the ignition switch OFF.
Disconnect the ECT sensor 2P (Blue) connector
(page 4-38).
Check the ECT sensor with the MCS.
Is about 0 V indicated?
YES
NO
3. ECT Sensor Output Line Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Gray) connector (page 4-
35).
Check for continuity between the wire harness side
ECT sensor 2P (Blue) connector [1] terminal and
ground.
CONNECTION: Pink/white – Ground
Is there continuity?
YES
NO
4-14
ECT SENSOR
– GO TO STEP 2.
– Intermittent failure
– GO TO STEP 3.
– Faulty ECT sensor
– Short circuit in Pink/white wire
– Replace the ECM with a known good one,
and recheck.
ECM
5 V
P/W
G/Y
[1]
P/W