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Engine Control System (4JH1) 6E-179 P1120 (Symptom Code E) (Flash Code 21) Circuit Description • 5 volts reference circuit The ECM supplies 5 volts to the APP sensor on the 5 Condition for Running the DTC Condition for Setting the DTC • The ECM detects APP sensor angle is more than 18%, then the idle switch is ON for longer than 0.6 Action Taken When the DTC Sets • The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. • The ECM uses an engine speed substitution of 1400 RPM. 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. DTC P1120 (Symptom Code E) (Flash Code 21) 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. Turn ON the ignition, with the engine OFF. 2. Observe the Idle Switch parameter with the Does the Tech 2 indicate OFF when the accelerator — Go to Step 5 Go to Step 3 3 1. Turn OFF the ignition. 2. Disconnect the idle switch harness connector. 3. Turn ON the ignition, with the engine OFF. 4. Observe the Idle Switch parameter with the Does the Tech 2 indicate ON when the circuit is — Go to Step 7 Go to Step 4 |