Honda CBR650F Service Manual page 104

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DTC 7-2 (ECT SENSOR HIGH VOLTAGE)
• Before starting the inspection, check for loose or
poor contact on the ECT sensor 2P (Blue), ECM 33P
(Black) and 33P (Gray) connectors, and recheck the
DTC.
1. ECT Sensor System Inspection
Check the ECT sensor with the MCS.
Is about 5 V indicated?
YES
NO
2. ECT Sensor System Inspection with Jumper
Wire
Turn the ignition switch OFF.
Disconnect the ECT sensor 2P (Blue) connector
(page 4-38).
Connect the wire harness side ECT sensor 2P
(Blue) connector [1] terminals with a jumper wire [2].
CONNECTION: Pink/white – Green/yellow
Check the ECT sensor with the MCS.
Is about 0 V indicated?
YES
NO
3. ECT Sensor Line Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Black) and 33P (Gray)
connectors (page 4-35).
Check for continuity between the wire harness side
ECT sensor 2P (Blue) connector [1] and ECM 33P
(Black) [2] and 33P (Gray) [3] connector terminals.
TOOL:
Test probe
CONNECTION:
Pink/white – Pink/white
Green/yellow – Green/yellow
Is there continuity?
YES
NO
4. ECT Sensor Resistance Inspection
Turn the ignition switch OFF.
Remove the ECT sensor (page 4-38).
Measure the resistance between the 2P connector
terminals of the ECT sensor [1].
STANDARD: 1.0 – 1.3 kΩ (40°C/104°F)
Is the resistance within standard value?
YES
NO
– GO TO STEP 2.
– Intermittent failure
– GO TO STEP 4.
– GO TO STEP 3.
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– Replace the ECM with a known good one,
and recheck.
– • Open circuit in Pink/white wire
• Open circuit in Green/yellow wire
– Replace the ECM with a known good one,
and recheck.
– Faulty ECT sensor
[1]
G/Y
[3]
P/W
[1]
G/Y
[1]
PGM-FI SYSTEM
P/W
[2]
[2]
G/Y
P/W
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