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6E-90 Engine Control System (4JH1) DTC P0115 (Symptom Code 1) (Flash Code 14) Circuit Description • The ignition switch is ON. Condition for Setting the DTC • The ECM detects that the ECT sensor signal voltage is more than 4.7 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 -15°C (5°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 scan tool. 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) • Use the Temperature vs. Resistance table to test the ECT sensor at various temperature levels to
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 scan tool. parameter with the scan tool. Is the ECT parameter less than the specified value? -35°C (-31°F) Go to Step 3 Go to Diagnostic Aids 3 1. Turn OFF the ignition. ECT sensor harness (pin 1 of E-41 connector) 4. Turn ON the ignition, with the engine OFF. 5.5 volts Go to Step 4 Go to Step 5 4 Important: The ECT sensor may be damaged if the module (ECM) (pin 89 of C-57 connector) and 2. Repair the circuit(s) as necessary. Go to Step 14 Go to Step 13 |