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Engine Control System (4JH1) 6E-63 P0100 (Symptom Code 9) (Flash Code 65) Circuit Description • Ignition voltage circuit The engine control module (ECM) provides 5 volts Condition for Running the DTC • The ignition switch is ON. Condition for Setting the DTC • The ECM detects that the MAF sensor 5 volts reference circuit voltage is less than 4.6 volts for Action Taken When the DTC Sets • The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. • The ECM uses a MAF substitution of 1600 mg/strk for engine control. • The ECM uses an EGR solenoid valve control substitution of 10%. Condition for Clearing the MIL/DTC • The ECM turns OFF the MIL when the diagnostic runs and does not fail. • A history DTC clears after 40 consecutive driving cycles without a fault. Or clear with the Tech 2. Diagnostic Aids • If an intermittent condition is suspected, refer to Intermittent Conditions in this section. Notice: • The MAF Sensor parameter on the Tech 2 will only update with engine running. Test Description DTC P0100 (Symptom Code 9) (Flash Code 65) Step Action Value(s) Yes No 1 Did you perform the Diagnostic System Check – — Go to Step 2 Go to Diagnostic System Check – Engine Controls 2 1. Install the Tech 2. 2. Turn OFF the ignition for 30 seconds. 3. Start the engine. 4. Monitor the Diagnostic Trouble Code (DTC) Does the DTC fail this ignition? — Go to Step 3 Go to Diagnostic Aids 3 1. Turn OFF the ignition. 2. Disconnect the mass air flow (MAF) sensor 3. Start the engine and let idle for 30 seconds. 4. Monitor the DTC Information with the Tech 2. Does DTC P0100 (Symptom Code B) set, but not — Go to Step 5 Go to Step 4 |