Tire pressure monitor (TPM), messages relevant to the function - GF40.15-P-0001-04TRU

Messages relevant to the function in the multifunction display (A1p13) of the instrument cluster (A1) indicate the system status to the driver.

Messages relevant to the function:

System fault(s)
System messages

System errors 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. In the event of complaint there is no reason to exchange system components.

System error message

Fig 1: Screen Display - Tyre Pressure Monitor Inoperative

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The following system errors are displayed:

problems in the CAN data bus
failure of a system component, e.g. TPM [RDK] control unit defective
at least one wheel fitted without a TPM wheel sensor
The instrument cluster does not receive any CAN messages from the TPM [RDK] control unit (e.g. cable open-circuit or interrupted connector with circuit 15 "ON")

An assigned fault code is stored in the TPM [RDK] control unit.

System message (request for system activation)

Fig 2: Screen Display - Request For System Activation

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

This system message is displayed if:

the TPM [RDK] control unit has been exchanged
A red message relevant to operation has been displayed in previous driving modes

A system message is displayed for approx 30 seconds each time the vehicle is restarted as soon as the monitoring function is set to "Not active" in the TPM [RDK] control unit.

System message (information message)

This system message appears after the TPM system is activated. This is necessary in the event of changes in tire inflation pressure and if a wheel is/wheels are changed.

Activation is possible with circuit 15 "ON" or when the engine is running.

Fig 3: Screen Display - Tyre Pressure Monitor Reactivated

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

System message (information message)

The system message is displayed for a temporary fault in the TPM system. No repairs are necessary.

Fig 4: Screen Display - Tyre Pressure Monitor Unavailable

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

This system message is activated for the following criteria:

a new TPM wheel sensor has been mounted and is currently being taught in
obstruction of data transfer by an external interference transmitter
temperature of one TPM wheel sensor above 120°C
transporting an additional TPM wheel sensor in the vehicle (e.g. winter wheels in the luggage compartment)

System message (information message)

The TPM system is switched off by means of STAR DIAGNOSIS.

Fig 5: Screen Display - Tyre Pressure Monitor Switched Off

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

System message (information message)

The TPM system is in diagnosis mode.

A complete and correct tire pressure monitoring is not ensured.

Fig 6: Screen Display - Tyre Pressure Monitor Diagnosis In Progress

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.