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6E–100 4JH1 ENGINE DRIVEABILITY AND EMISSIONS 7 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 ground circuit. Was the DVM indicated specified value? No continuity Go to Step 9 Go to Step 8 8 Repair the circuit for short to MAF sensor ground. — Verify repair — 9 Repair the short to ground circuit between the ECM — Verify repair Go to Step 12 10 Substitute a known good MAF & IAT sensor assembly — Go to Step 11 Go to Step 12 11 Replace the MAF & IAT sensor assembly. — Verify repair — 12 Is the ECM programmed with the latest software — Verify repair Go to Step 13 13 Replace the ECM. — Verify repair — Step Action Value(s) Yes No 4 3 C-116 83 4 C-116 C-57(B) |