Signal Missing
Signal missing
Checking the remote receiver
The remote receiver is located in the inner rear view mirror, and receives signals from both the remote control and the tire pressure sensors. The function of the remote receiver can be checked using the remote control.
Check that the remote receiver works by pressing the lock and unlock button on the remote control. The vehicle should be locked and unlocked.
Note! Fault-trace the symptoms first, if the remote control and receiver are not working.
Does the remote control and remote receiver work?
Yes - Checking tire pressure sensors
No - DONE
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Checking tire pressure sensors
- Ignition on.
Each tire pressure sensor has its own ID number and battery voltage status, which are sent to and stored in the Upper electronic module (UEM) Read out the ID numbers for the tire pressure sensors by clicking on the VCT2000 symbol.
Use the following special tools to activate the sensor.
- 951 2987 TPMS tool 951 2987 TPMS tool
The special tool activates the sensor, which then starts to send information to the Upper Electronic Module (UEM). After activating a sensor, press the "Show data" button for the relevant wheel. Repeat activation for all wheels. Different ID numbers should appear. If the same ID number is displayed as for the previous wheel, activation has failed. Then activate the relevant wheel again and press the "Show data" button again.
Note! Do not forget to press the correct button after each wheel has been activated.
Note! Make sure no special tools lie under the edge of the rim against the tire where the sensor is installed. Activation will not happen if the tool is placed next to the rim. The tool must then be kept in position for 5 seconds for the signals to be received correctly.Use only one special tool at a time in the vicinity of the vehicle.
Note! Avoid positioning the vehicle close to other moving vehicles, the receiver may then receive signals from the sensors of these vehicles. The incorrect ID number may then appear.
Then read off the ID number that is stored for the relevant diagnostic trouble code, by clicking on the diagnostic trouble code in the list. The ID number is then displayed in the window above the list.
Compare the read-out ID number for the relevant wheel with the ID number that is stored with the DTC.
If a sensor does not respond during the test:
- Replace the tire pressure sensor for the relevant wheel. It is probably the sensor that caused the DTC to be stored.
If all sensors respond:
- The sensor that caused the diagnostic trouble code to be stored has probably had an intermittent malfunction. Replace the tire pressure sensor for the relevant wheel.
Other information
Continue - Verification
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Fault-tracing information
Attempt New Test - Checking the remote receiver
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on.
Read out the ID numbers for the tire pressure sensors by clicking on the VCT2000 symbol.
Use the following special tools to activate the sensor.
- 951 2987 TPMS tool 951 2987 TPMS tool
The special tool activates the sensor, which then starts to send information to the Upper Electronic Module (UEM). After activating a sensor, press the "Show data" button for the relevant wheel. Repeat activation for all wheels. Different ID numbers should appear.
Note! Ensure that the special tool is positioned under the edge of the rim against the tire where the sensor is installed. The sensor will not be activated if the tool is against the rim. The sensor must then be held in place for approximately 5 seconds for the signals to be correctly received.Use only one special tool at a time in the vicinity of the car.
Note! Carry out the above in an area away from where other cars are being driven. The receiver can pick up signals from sensors on other cars. An incorrect ID number would then be displayed.
Check that the relevant sensor(s) respond. Test different wheels to ensure that different ID numbers are displayed.
Is the sensor OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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