sensor CHEVROLET AVEO 2002 Service Owner's Guide

Fig. 95: Vehicle Speed Sensor, 12 Volt Power Supply & Voltmeter
Courtesy of GENERAL MOTORS CORP.
1. Remove the connector of vehicle speed sensor, connect 12 volt power supply and voltmeter to the
terminal. Do not mistake polarit
y.

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Fig. 96: Pulses Per Revolution
Courtesy of GENERAL MOTORS CORP.
2. Rotate the driven gear.
3. Observe the voltage.
4. If the result of the inspection is bad, replace the vehicle speed sensor.
INPUT SPEED SENSOR INSPECTION
IMPORTANT: The voltage value will change from approximately 0 to 12 to 0 volts per
pulse (1). There will be 4 pulses per revolution (2).

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Fig. 97: Measuring The Resistance Of Each Input Speed Sensor Between Terminals
Courtesy of GENERAL MOTORS CORP.
1. Measure the resistance of each input speed sensor between terminals.

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Fig. 98: Sensor Resistance
Courtesy of GENERAL MOTORS CORP.
2. If the resistance value is not between the minimum and maximum resistance plot lines, then measure the
sensor resistance at 20°C (68°F).
3. If both resistance measurements are not between the minimum and maximum resistance plot lines, then
replace the input speed sensor.
PARK/NEUTRAL POSITION SWITCH INSPECTION
IMPORTANT: The resistance of the sensor can become infinity ohm when the
resistance measurement is made at high temperatures.

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Fig. 100: Polarity & Indicator Circuit Table
Courtesy of GENERAL MOTORS CORP.
2. Test the continuity of each range according to the polarity and indicator circuit table.
3. If an incorrect range is displayed during testing, then replace the PNP switch.
TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR INSPECTION

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Fig. 101: TFT Sensor
Courtesy of GENERAL MOTORS CORP.
1. Measure the resistance of the transmission fluid temperature (TFT) sensor between terminals 1 and 6 (1,
2) of the TFT connector at 10°C (50°F) and 110°C (230°F).
2. If the resistance measurement of 10°C (50°F) is not between 5.8-7.09 k ohms, replace the TFT sensor.
3. If the resistance measurement of 110°C (230°F) is not between 0.23-0.263 k ohms, replace the TFT
sensor.
SHIFT SOLENOID (1, 2), TIMING SOLENOID, LOCK-UP SOLENOID INSPECTION

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Fig. 129: ISS Sensor & Bolts
Courtesy of GENERAL MOTORS CORP.
10. Remove the bolt and the input shaft speed (ISS) sensor.
11. Remove the breather plug.
12. Remove the O-rin
g from the breather plug.

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Fig. 130: OSS Sensor & Bolts
Courtesy of GENERAL MOTORS CORP.
13. Remove the bolt and the output shaft speed (OSS) sensor.

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Fig. 134: Solenoid Connectors
Courtesy of GENERAL MOTORS CORP.
19. Remove the bolt and transmission fluid temperature sensor with the clamp.
20. Disconnect the 5 solenoid connectors.
Lock-up control solenoid (5)
Pressure control solenoid (1)
No. 2 shift solenoid (2)
No. 1 shift solenoid (3)
Timing solenoid (4)

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122. Install the TFT sensor with a clamp.
Fig. 303: Gasket

Courtesy of GENERAL MOTORS CORP.
123. Install a new
gasket to the oil strainer.

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