Table of contents: Glow plugs ↓ Coolant temperature sensor ↓ Ignition key inserted sensor ↓ Fan ↓ Injection Start Angle Control Valve ↓ Engine speed sensor ↓
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 heat up. After the ignition is turned on, the glow indicator lights up, which goes out as soon as the plugs 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; from 4 to 23 seconds (depending on the coolant temperature) after turning on the ignition, if the engine has not been started; 3 to 25 seconds after engine start if the generator is not running; from 10 to 345 seconds after engine start if the generator is running.
The glow plug relay and glow plugs are checked in the same way as for the CD20E engine. The glow plug resistance 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 cylinder. When the key is inserted, the switch should be closed.
Fan
The fan relay and motor are tested in the same way as for the CD20E motor.
Injection Start Angle Control Valve
By turning this valve on and off, the ECM regulates the pressure in the high-pressure fuel pump, thereby changing the injection start angle.
To check the valve, disconnect its connector and apply battery voltage through the fuse to contact 6. You should hear the valve click.
Engine speed sensor
The sensor produces voltage pulses when the drive shaft gear in the high-pressure fuel pump rotates (37 pulses per revolution).
To check the sensor, disconnect the connector and check the resistance between contacts 4 and 5. It should be about 1.6 ohms. If the sensor is faulty, the fuel injection pump must be replaced.
