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ENGINE DRIVEABILITY AND EMISSIONS 6E–157 7 Using the DVM and check the heater power supply 1. Ignition “On”, engine “Off”. 2. Disconnect the O 2 sensor connector. 3. Check the circuit for open circuit. Was the DVM indicated specified value? Battery Go to Step 9 Go to Step 8 8 Repair the open or short to ground circuit between the 2 Sensor” fuse (10A) and O 2 sensor. Is the action complete? — Verify repair — 9 Using the DVM and check the heater ground circuit. 1. Ignition “Off”, engine “Off”. 2. Install the breaker box as type A. (ECM disconnected) Ref. 6E-80. 3. Disconnect the O 2 sensor connector. 4. Check the circuit for open or short to ground circuit. Was the problem found? Breaker box is not available: 1. Ignition “Off”, engine “Off”. 2. Disconnect the O 2 sensor connector and ECM connector. 3. Check the circuit for open or short to ground circuit. Was the problem found? — Repair faulty harness and verify repair Go to Step 10 Step Action Value(s) Yes No 4 V E77 3 63 E77 3 31 E56(J2) E77 |