Page 136 - 2019 SHOP MANUAL CRF1000/A/D

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PGM-FI SYSTEM
3. O2 Sensor Heater Input Voltage Inspection
Turn the ignition switch ON.
Measure the voltage between the wire harness side [1]
4P (Black) connector [1] and ground.
Connection: Black/white (+) – Ground (–)
Is there battery voltage?
YES – GO TO STEP 4.
Bl/W
NO – Open circuit in the Black/white wire

4. O2 Sensor Heater Line Open Circuit Inspection
Disconnect the ECM/PCM 33P (Black) connector
(page 4-39). [1] [2]
Check for continuity between the wire harness side
O2 sensor 4P (Black) connector [1] and ECM/PCM
33P (Black) connector [2].
TOOL:
Test probe 07ZAJ-RDJA110

Connection: White – C7 W
C7
Is there continuity?
YES – GO TO STEP 5.
NO – Open circuit in the White wire

5. O2 Sensor Heater Line Short Circuit Inspection
Check for continuity between the wire harness side
4P (Black) connector [1] and ground. [1]
Connection: White – Ground
Is there continuity?
YES – Short circuit in the White wire
NO – Replace the ECM/PCM with a known good W
one (page 4-39) and recheck.

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