Tire pressure monitor (TPM), messages relevant to the function - GF40.15-P-0001-04F
Models 215, 220 as of 1.10.03 with code (475) tire pressure monitor
Messages relevant to the function in the multifunction display (A1p13) of the instrument cluster (A1) indicate to the driver a system state in which no current tire pressures and also no messages relevant to the operation are displayed.
Message relevant to the function are divided into:
- System fault(s)
- System messages
The following messages relevant to the function can occur:
System faults are stored in the TPM [RDK] control unit (N88) with a fault code and system messages with an event code.
System messages describe a regular operating condition and in the case of a fault there is no reason to exchange system components.
System fault(s)
This message appears for:
- Faults in the CAN data bus.
- Failure of a system component.
- At least 1 wheel is fitted without a TPM wheel sensor (A69/1, A69/2, A69/3, A69/4).
- The instrument cluster (A1) does not receive any CAN messages from TPM [RDK] control unit (N88) (e.g. cable discontinuity or connector fallen off with circuit 15 On).
A corresponding fault code is stored in the TPM control unit (N88).
System message
Request for system activation.
This system message is displayed if:
- The TPM [RDK] control unit (N88) has been replaced.
- A red message, relevant to operation, has been displayed in the previous ignition sequences.
This system message is also displayed for approx. 30 seconds each time the vehicle is restarted, as soon as in the TPM [RDK] control unit (N88) the monitoring function has been set to "Not active".
Information message
This information message is displayed once the request to activate the system has been canceled.
System message
This system message appears once the system is activated. This is necessary in the event of changes in tire inflation pressure, a tire change or wheel change.
Activation is possible with circuit 15 On or when the engine is running.
System message
This system message is activated for the following criteria:
- At least 1 new wheel sensor (A69/1, A69/2, A69/3, A69/4) is fitted and is currently being taught in.
- An external interference transmitter hinders data transfer.
- Temperature of at least one TPM wheel sensor (A69/1, A69/2, A69/3, A69/4) > 120 °C.
- There is at least 1 additional TPM wheel sensor (A69/1, A69/2, A69/3, A69/4) in the vehicle (e.g. winter wheels in luggage compartment).
The system message is displayed for a temporary fault in the tire pressure monitor (TPM) system. No repairs are necessary.
Information message
The pressure values are only shown following activation, once the system has detected a clear assignment. Until the teach-in process is finished (total driving time approx.10 min) only the system message opposite is displayed instead of pressure values.
This information message cannot be canceled with the reset button. Pressing the reset button starts the activation again.
Information message
The transmitter key (A8/1) is in the position circuit 15R On.
The current pressure values are only displayed with circuit 15 On or when the engine is running.
Information message
Tire pressure monitor (TPM) switched off by means of STAR DIAGNOSIS.
Information message
The system is in diagnostic mode (complete and correct tire pressure monitoring is not ensured).