Electronic control system [Toyota Duet M100]

Contents: Intake Air Temperature Sensor ↓ Coolant temperature sensor ↓ Fuel pump relay, main injection…↓ DWT system valve ↓ Knock sensor ↓ Oxygen sensor ↓

Intake Air Temperature Sensor

Check the resistance at the terminals of the intake air temperature sensor.

EJ Series

Location of components of the electronic engine control system (EK-VE, models for Japan)
1 - fuel pump,
2 - electronic control unit,
3 - relay block,
4 - camshaft position sensor,
5 - nozzle,
6 - fuel knock sensor,
7 - start inhibit switch (models with automatic transmission),
8 - rear oxygen sensor,
9 - coolant temperature sensor,
10 - front oxygen sensor,
11 - crankshaft position sensor,
12 - DWT system valve,
13 - ignition coil,
14 - intake air temperature sensor,
15 - ISC valve,
16 - throttle position sensor,
17 - absolute air pressure sensor at the intake,
18 - solenoid pneumatic valve,
19 - vehicle speed sensor,
20 - diagnostic connector.

KZ series.

Coolant temperature sensor

Resistance check

Check the resistance between the connector terminals.

Note: When immersing the sensor in water, do not allow water to come into contact with the connector. After checking the sensor, wipe off all water from it.

1 - thermistor for engine management system,
2 - thermistor for the pointer sensor.

Fuel pump relay, main injection system relay and radiator fan relay

1. Turn the ignition key to the "ON" position and check for sound and vibration to ensure that the relay is operating.

Caution: The relay may be hot after long periods of use.

2. Measure the resistance between terminals "1" - "3".

Nominal resistance - 74-117 Ohm

3. Apply battery voltage to terminals "1" - "3" of the relay and check for conductivity between terminals "2" - "4".

Location of components of the electronic engine control system (KZ-VE, models for Japan).
1 - fuel pump,
2 - electronic control unit,
3 - relay block,
4 - intake air temperature sensor,
5 - electro-pneumatic valve,
6 - camshaft position sensor,
7 - fuel knock sensor,
8 - start inhibit switch (models with automatic transmission),
9 - oxygen sensor,
10 - coolant temperature sensor,
11 - nozzle,
12 - oxygen sensor,
13 - crankshaft position sensor,
14 - engine ignition coil,
15 - throttle position sensor,
16 - absolute air pressure sensor at the intake,
17 - ISC valve,
18 - diagnostic connector.

DWT system valve

1. Checking the resistance.

a) Check the resistance between the connector terminals.

Nominal value (at 20°C) - 6.9-7.5 Ohm

2. Checking the work.

a) Apply battery voltage to the terminals and check the valve valve movement.

Note:

Make sure the valve core is not sticking.

If the valve return is impeded by contamination or foreign particles, a small leak will occur in the advance line. Eventually, conditions will occur that will generate a diagnostic code.