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4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS 6E–107 8 Using the DVM and check the MAF sensor power 1. Ignition “Off”, engine “Off”. 2. Disconnect the MAF & IAT sensor connector and ECM connector. 3. Check the circuit for short to MAF sensor heater circuit. Was the DVM indicated specified value? No continuity Go to Step 10 Go to Step 9 9 Repair the circuit for short to MAF sensor heater — Verify repair — 10 Repair the short to battery voltage circuit between the — Verify repair Go to Step 13 11 Substitute a known good MAF & IAT sensor assembly — Go to Step 12 Go to Step 13 12 Replace the MAF & IAT sensor assembly. — Verify repair — 13 Is the ECM programmed with the latest software — Verify repair Go to Step 14 14 Replace the ECM. — Verify repair — Step Action Value(s) Yes No 4 2 C-51 83 4 C-51 C-57(B) |