Checking Drive, Backrest
Checking drive, backrest
Conditions
To carry out this fault-tracing the control panel must be fault-free.
Has fault-tracing been carried out on the control panel?
Yes - Checking activation
No - Fault-tracing information
Carry out fault-tracing on the control panel according to the table of symptoms.
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Fault-tracing information
Continue carrying out fault-tracing on the control panel.
Continue - ANOTHER TEST
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Checking activation
- Ignition off.
Adjust the seat backrest backward and forward with the control button.
Does the backrest move forward and backward?
Yes - No Fault Found
No - Checking the control module
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Checking the control module
- Ignition off.
- Remove the seat from the car according to Lifting the power seat in and out Lifting the Power Seat In and Out.
- Connect wiring to the seat.
Connect a voltmeter between ground and the gray 14-pin connector terminal B:1 for adjusting the backrest forward and B:2 for adjusting the backrest backward.
Adjust the seat backrest backward and forward with the control button.
The voltmeter should read battery voltage when the function is activated.
OK - Checking the engine
Not OK - Replacing the component
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Replacing the component
Try a new control module according to Control module Control Module.
Continue - Verification
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Checking the engine
- Ignition off.
- Wiring according to connected.
- Disconnect drive shaft from motor 2 according to Replacing the backrest motor and potentiometer Replacing the Backrest Motor and Potentiometer.
Activate motor 2 using the control button for the backrest.
Does the motor function?
Yes - Checking backrest mounting
No - Replacing the component
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Replacing the component
Try a new motor according to Replacing the backrest motor and potentiometer Replacing the Backrest Motor and Potentiometer.
Continue - Verification
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Checking backrest mounting
- Ignition off.
- Wiring according to connected.
- Disconnect drive shaft from the motor according to: Replacing the backrest motor and potentiometer Replacing the Backrest Motor and Potentiometer.
- Reinstall the shaft in the backrest mounting.
Rotate the drive shaft by hand 4 turns.
If the shaft rotates with the normal torque the backrest mounting is OK.
Does the shaft rotate with the normal torque?
OK - Checking component
Not OK - Replacing the component
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Replacing the component
Try a new backrest according to Backrest mounting Backrest Mounting.
Continue - Verification
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Checking component
- Ignition off.
- Check the motor 2 connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition OFF.
- Reinstall components, connectors etc.
Operate backrest forward/backward using the control button.
Does the backrest operate in both directions?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Checking activation
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