DTC P0380 (Flash Code 66) Glow Plug Circuit (RZ4E-TC)

1. DTC P0380 description

The ECM controls the glow relay that supplies power to the glow plug based on the engine coolant temperature. During the after glow period, the glow plug works for a predetermined period of time. If the ECM detects an open circuit or a short circuit in the relay control circuit, the DTC is set.

2. Condition for setting DTC P0380

Condition for running the DTC

The battery voltage is 9 V or more.
The ignition switch is ON.
DTCs P0335, P0336, and P0340 are not set.

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0335 (Flash Code 15) Crankshaft Position Sensor Circuit".

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0336 (Flash Code 15) Crankshaft Position Sensor Circuit Range/Performance".

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC P0340 (Flash Code 14) Camshaft Position Sensor Circuit".

Condition for setting the DTC

Any of the following are met:

The ECM detects a low voltage condition in the glow relay control circuit for 3 seconds or more when the relay is commanded OFF.
The ECM detects a high voltage condition in the glow relay control circuit for 3 seconds or more when the relay is commanded ON.

3. Action taken when DTC P0380 sets

Euro4: The ECM illuminates the SVS indicator light. Refer to Action taken when DTC sets - Type C (Euro4).
Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".

4. Condition for clearing DTC P0380

Euro4: Refer to Condition for clearing the SVS indicator light/DTC - Type C (Euro4).
Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".