Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Section 881 (Power Shoulder Belt Anchorage System): Inspection
- INSPECT DRIVER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR OPERATION
- Connect the positive (+) lead from the battery to terminal 6 and the negative (-) lead to terminal 4, and check that the slider moves upward.
- Reverse the polarity and check that the slider moves downward.
If operation is not as specified, replace the height adjustable anchor motor.
- Inspection using an ammeter:
INSPECT DRIVER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR PTC THERMISTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 4, the positive (+) lead from the ammeter to terminal 6, and the negative (-) lead to battery negative (-) terminal, then move the slider to end position.
- Continue to apply voltage and check the current changes to less than 0.1 A within 6 to 46 seconds.
- Disconnect the leads from terminals.
- Approximately 60 seconds later, connect the positive (+) lead from battery to terminal 6 and the negative (-) lead to terminal 4, and check that the slider moves to the opposite side.
If operation is not as specified, replace the height adjustable anchor motor.
- Inspection using an ammeter with a current-measuring probe: INSPECT DRIVER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR PTC THERMISTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 6.
- Attach a current-measuring probe to the negative (-) lead, and move the slider to the end position.
- Check the current changes to less than 0.1 A with 6 to 46 seconds.
- Disconnect the leads from terminals.
- Approximately 60 seconds later, reverse the polarity, and check that the slider moves to the opposite side.
If operation is not as specified, replace the height adjustable anchor motor.
- INSPECT PASSENGER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR OPERATION
- Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 3, and check that the slider moves upward.
- Reverse the polarity and check that the slider moves downward.
If operation is not as specified, replace the height adjustable anchor motor.
- Inspection using an ammeter: INSPECT PASSENGER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR PTC THERMISTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 3, the positive (+) lead from the ammeter to terminal 4, and the negative (-) lead to battery negative (-) terminal, then move the slider to end position.
- Continue to apply voltage and check the current changes to less than 0.1 A within 6 to 46 seconds.
- Disconnect the leads from terminals.
- Approximately 60 seconds later, connect the positive (+) lead from battery to terminal 4 and the negative (-) lead to terminal 3, and check that the slider moves to the opposite side.Fig 8: Inspecting Passenger'S Height Adjustable Anchor Motor And Sensor PTC Thermistor Operation (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If operation is not as specified, replace the height adjustable anchor motor.
- Inspection using an ammeter with a current-measuring probe: INSPECT PASSENGER'S HEIGHT ADJUSTABLE ANCHOR MOTOR AND SENSOR PTC THERMISTOR OPERATION
- Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 4.
- Attach a current-measuring probe to the negative (-) lead, and move the slider to the end position.
- Check the current changes to less than 0.1 A within 6 to 46 seconds.
- Disconnect the leads from terminals.
- Approximately 60 seconds later, reverse the polarity and check that the slider moves to the opposite side.
If operation is not as specified, replace the height adjustable anchor motor.
- INSPECT DRIVER'S SHOULDER BELT ADJUST SWITCH CIRCUIT (See SHOULDER BELT ADJUST SWITCH CIRCUIT )
- INSPECT DRIVER'S SHOULDER BELT ADJUST SWITCH CONTINUITY CONNECTOR TERMINALS SPECIFIED CONDITION
Switch position Tester connection Specified condition UP 2 - 3 Continuity OFF - No continuity DOWN 1 - 3 Continuity - INSPECT PASSENGER'S SHOULDER BELT ADJUST SWITCH CONTINUITY CONNECTOR TERMINALS SPECIFIED CONDITION
Switch position Tester connection Specified condition UP 2 - 3 Continuity OFF - No continuity DOWN 1 - 3 Continuity If continuity is not as specified, replace the switch.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.