Page 122 - 2019 SHOP MANUAL CRF1000/A/D

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PGM-FI SYSTEM
DTC 7 (ECT SENSOR)
ECM/PCM

5 V

ECT SENSOR
Lg

Gr/Bl

Probable cause
• Open or short circuit in the Light green wire between
the ECT sensor and ECM/PCM
• Open circuit in the Gray/black wire between the ECT
sensor and ECM/PCM
• Faulty ECT sensor
• Faulty ECM/PCM
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 – GO TO STEP 2.
NO – Intermittent failure
2. ECT Sensor System Inspection with Connector
Disconnected
Turn the ignition switch OFF.
Disconnect the ECT sensor 2P (Black) connector
(page 4-41).
Check the ECT sensor with the MCS.
Is about 0 V indicated?
YES – GO TO STEP 3.
NO – Faulty ECT sensor
3. ECT Sensor Output Line Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM/PCM 33P (Gray) connector [1]
(page 4-39).
Check for continuity between the wire harness side
2P (Black) connector [1] and ground.
Connection: Light green – Ground
Is there continuity? Lg
YES – Short circuit in the Light green wire
NO – Replace the ECM/PCM with a known good
one (page 4-39) and recheck.

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