Glow plugs
After the ignition key is inserted into the lock, the engine control unit turns on the glow relay and the glow plugs begin to warm up. After the ignition is turned on, the glow indicator lights up, which goes out as soon as the candles reach operating temperature. The glow relay remains on for 3-4 seconds after the key has been inserted into the lock, but the ignition has not been turned on; 4 to 23 seconds (depending on coolant temperature) after switching on the ignition, if the engine has not been started; 3 to 25 seconds after starting the engine if the generator is not running; 10 to 345 seconds after engine start if generator is running.
Checking the glow relay and glow plugs is done in the same way as for the CD20E engine. The resistance of the plugs at 25°C should be about 0.65 ohms.
Coolant temperature sensor
Ignition key inserted sensor
The sensor is a switch built into the ignition lock cylinder. When the key is inserted, the switch must be closed.
Fan
Checking the relay and fan motor is carried out in the same way as for the CD20E motor.
Injection angle control valve
By turning this valve on and off, the ECM regulates the pressure in the injection pump, thereby changing the injection start angle.
To check the valve, disconnect its connector and apply battery voltage through the fuse to pin 6. You should hear the click of the valve.
Engine speed sensor
The sensor generates voltage pulses when the drive shaft gear rotates in the injection pump (37 pulses per revolution).
To check the sensor, disconnect the connector and check the resistance between pins 4 and 5. It should be about 1.6 ohms. If the sensor is defective, the injection pump must be replaced.