Signal Too Low or Signal Missing
Signal too low or signal missing
Checking for permanent or intermittent faults
- Ignition on.
Check if the lamp in the power door mirror lights up and goes out.
Is the lamp in the power door mirror working?
Yes - Intermittent fault
No - Checking for short-circuits to ground or open-circuits
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Checking for short-circuits to ground or open-circuits
Check the cable between control module terminal # 8B and power door mirror terminal #13. Check for a short-circuit to ground. Check for an open-circuit.
Check the ground lead between the control module terminal #10B and the power door mirror terminal #6.
Replace the cable if a fault is found.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- To access and replace the door control module, see Driver's door module / passenger door module (DDM/PDM), replacing Driver's Door Module/Passenger Door Module (DDM/PDM), Replacing
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.
Were any faults found in the cable?
Yes - Verification
No - Replacing the component
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Replacing the component
Check that there are no short circuits in the bulb holder.
Remedy as necessary.
If no fault is found, replace the lamp in the power door mirror according to Bulb, ground lighting, door mirror, replacing Bulb, Ground Lighting, Door Mirror, Replacing.
Continue - Verification
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Intermittent fault
Check the control module and power door mirror connectors. Check for contact resistance, oxidation and loose connections.
Check the cable between control module terminal #8B and power door mirror terminal #13. Check for an intermittent short-circuit to ground. Check for an intermittent open-circuit.
Check the ground lead between the control module terminal #10B and the power door mirror terminal #6.
Check the bulb holder and bulb if no fault was found.
Other information:
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box
- For further information about signals and other values, see Signal specification Pinout Values and Diagnostic Parameters
- To access and replace the lamp and bulb holder, see Bulb, ground lighting, door mirror, replacing Bulb, Ground Lighting, Door Mirror, Replacing
- Checking wiring and terminals Checking Wiring And Terminals.
Continue - Fault-tracing information
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Verification
Verification
Verification
Hint: After the repair it is necessary to check that the fault has been rectified.
- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
Check that electric rear-view mirror lamp comes on.
Does lamp for electric rear-view mirror come on?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - Fault Found
VERIFICATION FAILED - Fault-tracing information
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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 - FAULT-TRACING FAILED
No - Attempt New Test
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FAULT-TRACING FAILED - No Fault Found
Attempt New Test - Checking for permanent or intermittent faults
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - Fault Found
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FAULT FOUND - Fault Found
Attempt New Test - Checking for permanent or intermittent faults
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