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6E-74 Engine Control System (4JH1) Step Action Value(s) Yes No 4 1. Turn OFF the ignition. circuit of the MAF sensor harness (pin 3 of C-116 Does the test lamp illuminate? Go to Step 7 Go to Step 6 5 Important: The MAF sensor may be damaged if the module (ECM) (pin 88 of C-57 connector) and • A short to battery or ignition voltage 2. Repair the circuit(s) as necessary. Go to Step 11 Go to Step 10 6 1. Test the low reference circuit between the ECM (pin 92 of C-57 connector) and the MAF sensor 2. Repair the circuit(s) as necessary. Go to Step 11 Go to Step 8 7 1. Turn OFF the ignition. connection at the harness connector of the MAF 3. Repair the connection(s) as necessary. Go to Step 11 Go to Step 9 8 1. Turn OFF the ignition. connection on the MAF sensor circuit at the 4. Repair the connection(s) as necessary. Go to Step 11 Go to Step 10 9 Replace the MAF sensor. Refer to Mass Air Flow Go to Step 11 10 Important: Replacement ECM must be Go to Step 11 11 1. Reconnect all previously disconnected harness connector(s). 2. Clear the DTCs with the scan tool. (accelerator pedal full travel) many times while Did the DTC fail this ignition? Go to Step 3 Go to Step 12 12 Observe the DTC Information with the scan tool. Go to Diagnostic Trouble Code (DTC) List System OK
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