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4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS 6E–131 7 Using the DVM and check the ECT sensor signal 1. Ignition “Off”, engine “Off”. 2. Install the breaker box as type A. (ECM disconnected) Ref. Page 6E-81 3. Disconnect the ECT sensor connector. 4. Check the circuit for short to sensor ground or ground circuit. Was the problem found? Breaker box is not available: 1. Ignition “Off”, engine “Off”. 2. Disconnect the ECT sensor connector and ECM connector. 3. Check the circuit for short to sensor ground or ground circuit. Was the problem found? — Repair faulty verify repair Go to Step 10 8 Substitute a known good ECT sensor assembly and — Go to Step 9 Go to Step 10 9 Replace the ECT sensor. — Verify repair — 10 Is the ECM programmed with the latest software — Verify repair Go to Step 11 11 Replace the ECM. — Verify repair — Step Action Value(s) Yes No 89 93 93 89 C-57(B) |