TIRE PRESSURE MONITORING  TIRE PRESSURE WARNING SYSTEM  HOW TO PROCEED WITH TROUBLESHOOTING  

Interview the customer to confirm the problem.

HINT:

It is important to collect as much specific information as possible from the customer to allow for a quick repair.

Turn the ignition switch off.

Connect the GTS to the DLC3.

Turn the ignition switch to ON.

Turn the GTS on.

Enter the following menus: Chassis / Tire Pressure Monitor / Data List.

Set all tire pressures to the specified value.

NOTICE:

Refer to the link as the procedure for adjusting the tire pressures differs depending on the temperature of the tires.

Click hereSuspension>TIRE / WHEEL>TIRE AND WHEEL SYSTEM>INSPECTION201906,999999,_53,_079312,_0387327,RM100000001J32Q,

Display "ID Tire Inflation Pressure" in the Data List and check that the tire pressure values match the adjusted pressure amount.

HINT:

It may take a few minutes until the values are displayed.

Perform initialization.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>INITIALIZATION201906,999999,_53,_078885,_0382739,RM100000001IHE2,

HINT:

for FMVSS138 Type:

·

The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following condition is met:

-

Due to the operation of the tire pressure warning reset switch, the tire pressure drops to approximately 75% or less of the tire pressure set during system initialization.

HINT:

The tire pressure warning pressure (pressure at which the tire pressure warning light is illuminated) cannot be set to approximately 75% or less of a specified tire pressure value.

for ECE-R64 Type:

·

The warning threshold value changes depending on the driving conditions during initialization. As a result, the tire pressure warning light may not turn off even if the tire pressure is adjusted to the specified pressure.

·

The tire pressure warning system illuminates the tire pressure warning light to warn the driver when any of the following conditions are met:

-

Due to the operation of the tire pressure warning reset switch, the tire pressure drops to approximately 80% or less of the tire pressure set during system initialization.

-

The tire pressure drastically decreases (approximately 20 kPa (0.2 kgf/cm², 2.9 psi) or more within several minutes) to approximately 80% or less of the tire pressure* when the tires are warmed.

*: If initialization is performed and the vehicle is driven for a certain period of time, the tire pressure set during system initialization is adjusted and set to the tire pressure when the tires are warmed from the driving conditions.

HINT:

The tire pressure warning pressure (pressure at which the tire pressure warning light is illuminated) cannot be set to approximately 80% or less of a specified tire pressure value.

The value that is approximately 80% of the set tire pressure during initialization*1 and the lower limit threshold value*2 are both displayed on the GTS, and the higher of the two values is set as the tire pressure warning threshold value.

GTS Data List Item

*1: "Initial Threshold of Low-pressure"

*2: "Threshold of Low-pressure (Lower Limit)"

NOTICE:

If the tire pressure is decreased approximately 20 kPa (0.2 kgf/cm², 2.9 psi) or more in order to adjust the tire pressure, even if the adjusted tire pressure is 80% or more than the tire pressure set during system initialization, the tire pressure warning light may illuminate if the tire pressure drops below 80% of the tire pressure set when the tires are warmed. In this case, perform initialization again.

Check the ECUs connected to the CAN bus.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM201906,202005,_57,_078518,_0381088,RM100000001IUWS,202005,202107,_57,_078518,_0381088,RM100000001M0XB,202107,202208,_57,_078518,_0381088,RM100000001X4LL,202208,202310,_57,_078518,_0381088,RM10000000257V5,202310,999999,_57,_078518,_0381088,RM100000002G45R,

Check for DTCs.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM>DIAGNOSIS SYSTEM201906,202005,_57,_078518,_0381088,RM100000001IUWS,202005,202107,_57,_078518,_0381088,RM100000001M0XB,202107,202208,_57,_078518,_0381088,RM100000001X4LL,202208,202310,_57,_078518,_0381088,RM10000000257V5,202310,999999,_57,_078518,_0381088,RM100000002G45R,

Check for DTCs.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>DTC CHECK / CLEAR201902,999999,_53,_078885,_0382739,RM100000001G6WK,

Refer to Diagnostic Trouble Code Chart.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>DIAGNOSTIC TROUBLE CODE CHART201906,202208,_53,_078885,_0382739,RM100000001IHCC,202208,999999,_53,_078885,_0382739,RM1000000024HPJ,

Refer to Problem Symptoms Table.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>PROBLEM SYMPTOMS TABLE201906,999999,_53,_078885,_0382739,RM100000001IHE3,

Refer to Electronic Circuit Inspection Procedure.

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>ELECTRONIC CIRCUIT INSPECTION PROCEDURE201902,999999,_V1,_078841,_0386803,RM100000001GTWX,

Repair or replace parts based on the diagnosis result.

Check the Data List to confirm that the tire inflation pressure has been received.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>DATA LIST / ACTIVE TEST201906,999999,_53,_078885,_0382739,RM100000001IH33,

Perform initialization.

Click hereSuspension>TIRE PRESSURE MONITORING>TIRE PRESSURE WARNING SYSTEM>INITIALIZATION201906,999999,_53,_078885,_0382739,RM100000001IHE2,

Confirm that the initialization has been completed.