B3000 4WD V6-3.0L OHV (1995)
Transmission Position Switch/Sensor: Testing and Inspection
Transmission Range (TR) Sensor Testing Using
Transmission Tester
The transmission tester allows a technician to operate the electrical portion of the TR sensor.
1. Perform Preparation and Hook-up procedures.
Caution: For resistance checks, be sure that the tester selector switch is set to the TR SENSOR TEST position or damage to the ohmmeter may
result.
2. Resistance/continuity tests.
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Using a digital volt-ohmmeter, the transmission tester and Transmission Range (TR) Sensor Cable 49 UNO1 147 or equivalent, perform TR
Sensor test based on the DTCs that were displayed.
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Perform services as indicated by the pinpoint tests. Always retest and road test vehicle after any service.
3. TR sensor resistance tests.
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Set ohmmeter to 1000 ohm range.
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Connect the positive lead of the ohmmeter to the TR/MLP jack.
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Connect the negative lead of the ohmmeter to the SIG RTN jack.
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Move transmission gearshift selector lever into each gear position.
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Record resistance at each position.
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Refer to the following chart for values.
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If out of range, perform TR Sensor test.
4. Voltage tests-park/neutral, backup lamp and optional circuit.
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Set tester selector switch to the TR SENSOR TEST position.
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Press and HOLD each button while moving the gear-shift lever through EACH gear position.
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Monitor each LED.
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The status LED should indicate RED only in the indicated position. Refer to overlay.
Note: LED will turn RED when the circuit closes and turn OFF when the circuit is open.
