Receiver error

It is necessary to register an id code after replacing the tire pressure warning valve abd transmitter and/or the tire pressure warning ecu (see page tw-9).

Set the tire pressure to the specified value.

1. Check tire pressure warning ecu

1. Measure the voltage of the connector.

Standard voltage

2. Check wire harness (ecu - receiver)

1. 1
   Disconnect the e56 ecu connector.
2. 2
   Disconnect the l20 receiver connector.
3. 3
   Measure the resistance of the wire harness side connectors.

Standard resistance

3. Replace tire pressure warning antenna and receiver

1. 1
   Check dtc
2. 2
   Check for dtc (see page tw-20).

• It is necessary to register an id when replacing the tire pressure warning ecu (see page tw-9).
• Read id on the data list before removing the tire pressure warning ecu. Register the id in the new tire pressure warning ecu.

15. Check wire harness (ecu - receiver)

1. 1
   Disconnect the e56 ecu connector.
2. 2
   Disconnect the l22 receiver connector.
3. 3
   Measure the resistance of the wire harness side connectors.

Standard resistance