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Engine Control System (4JH1) 6E-79 P0115 (Symptom Code 2) (Flash Code 14) Circuit Description Condition for Running the DTC • The ignition switch is ON. Condition for Setting the DTC • The ECM detects that the ECT sensor signal voltage is less than 0.3 volts for 3 seconds. Action Taken When the DTC Sets • The ECM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. • The ECM uses an ECT substitution of fuel temperature for engine control. • The ECM uses an ECT substitution of 60 °C (120 °F) for injection timing control. • The ECM uses an ECT substitution of -25 °C (- 13 °F) for glow control. 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. • After starting the engine, the ECT should rise steadily to about 80 °C – 85°C (176°F – 185°F) then stabilize when the thermostat opens. • Use the Temperature vs. Resistance table to test the ECT sensor at various temperature levels to DTC P0115 (Symptom Code 2) (Flash Code 14) 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 ON the ignition, with the engine OFF. 3. Observe the Engine Coolant Temperature Is the ECT parameter more than the specified 135 °C (275°F) Go to Step 3 Go to Diagnostic Aids 3 1. Turn OFF the ignition. 2. Disconnect the ECT sensor harness 3. Turn ON the ignition, with the engine OFF. 4. Observe the Coolant Temperature parameter Is the ECT parameter less than the specified -35 °C (-31°F) Go to Step 5 Go to Step 4 |