Contents: Checking the throttle position sensor ⇓ Checking the oil temperature sensor ⇓ Checking the vehicle speed sensor ⇓ A/T Control Relay Test ⇓ Checking the solenoid valve ⇓
Checking the throttle position sensor
The throttle position sensor is a variable resistor that rotates with the throttle shaft and provides information to the ECM to determine when the throttle is closed, fully open, or somewhere in between.
The sensor is rigidly connected to the throttle shaft. Depending on the position of the throttle valve, the resistance of the sensor changes.
Checking the oil temperature sensor
1. Remove the oil temperature sensor.
2. Measure the resistance between terminals "1" and "2" of the oil temperature sensor connector. Resistance: 16.7-20.5 kOhm at 0°C, 0.57-0.69 kOhm at 100°C.
Checking the vehicle speed sensor
1. Remove the vehicle speed sensor and connect a 3-10 kOhm resistor as shown in the figure.
2. Turn the vehicle speed sensor shaft and check that there is voltage between terminals "2" and "3" (1 revolution = 4 pulses).
A/T Control Relay Test
1. Remove the A/T control relay.
2. Using jumpers, connect terminal "2" of the A/T control relay to the negative (–) battery terminal and terminal "4" of the control relay to the positive (–) battery terminal.
3. Check for continuity between terminal "1" and terminal "3" of the A/T control relay when jumper wires are connected and disconnected from the battery.
- When connecting jumpers between the relay terminals, there should be conductivity.
- When disconnecting the jumpers between the relay terminals, there should be no conductivity.
4. If the test results are negative, replace the relay.
Checking the solenoid valve
1. Remove the valve body cover.
2. Disconnect the connectors from each solenoid valve.
3. Measure the resistance between terminals "1" and "2" of each solenoid valve.
Resistance:
- Shock Absorber Clutch Solenoid Valve: 2.7-3.4 ohms at 20°C
- Low and Reverse Solenoid Valve: 2.7-3.4 ohms at 20°C
- Second gear solenoid valve: 2.7–3.4 ohms at 20°C
- Downshift Solenoid Valve: 2.7-3.4 ohms at 20°C
- Overdrive Solenoid Valve: 2.7-3.4 ohms at 20°C
4. If the valve resistance is different, replace the solenoid valve.
Attention! Check the resistance of the solenoid valves by connecting an ohmmeter to the connector contacts.
Contacts | Purpose | Resistance |
7 and 10 | Shock absorber clutch valve | 2.7–3.4 Ohm at 20°C |
10 and 6 | Low and reverse gear valve | |
9 and 4 | Second gear valve | |
9 and 3 | Downshift valve | |
9 and 5 | Overdrive valve |
