NO.1 TPMS WARNING LIGHT ILLUMINATES

id020300101000

Caution

•  The tire pressure monitoring system warning light illuminates according to the decrease in a tire air pressure (tire pressure monitoring system is normal).

•  The No.1 TPMS WARNING LIGHT ILLUMINATES the diagnostic procedure if the tire pressure monitoring system warning light illuminated due to a decrease in a tire pressure although the tire pressure monitoring system is normal.

Possible malfunction

Diagnostic Procedure

Note

•  The diagnostic procedure differs depending on the DSC HU/CM specification.

•  Before performing the diagnostic, verify the DSC HU/CM specification to prevent incorrect diagnosis.

•  The DSC HU/CM specification can be verified by the first four digits of the part number indicated on the label adhered to the DSC HU/CM.

ac5wzw00006259

First 4 digits of part number for Type A DSC HU/CM

―  K011

―  K0Y1

First 4 digits of part number for Type B DSC HU/CM

―  KJ11

―  KJY1

Diagnostic procedure for Type A DSC HU/CM

Step	Inspection	Results	Action
1	TIRE PRESSURE INSPECTION •  Inspect tire pressures while the tires are cold. (See WHEEL AND TIRE SPECIFICATION.) •  Are the tire pressures at the specification?	Yes	Go to the next step.
		No	Adjust the tire pressures to the specification while the tires are cold.
2	TIRE PRESSURE MONITORING SYSTEM INITIALIZATION •  Perform tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.) •  Was the tire pressure monitoring system initialization performed?	Yes	Go to the next step.
		No	Perform the tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.)
3	VERIFY MIS-USE PREVENTION LOGIC (FIRST TIME) •  Drive the vehicle for several minutes after the tire pressure monitoring warning light turns off. •  Does the tire pressure monitoring warning light illuminate?	Yes	Go to the next step.
		No	The tire pressure monitoring system is normal.
4	TIRE PRESSURE MONITORING SYSTEM INITIALIZATION •  Perform the tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.) •  Was the tire pressure monitoring system initialization performed?	Yes	Go to the next step.
		No	Perform the tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.)
5	MIS-USE PREVENTION LOGIC VERIFICATION (SECOND TIME) •  Drive the vehicle for several minutes after the tire pressure monitoring warning light turns off. •  Does the tire pressure monitoring warning light illuminate?	Yes	Go to the next step.
		No	The tire pressure monitoring system is normal.
6	TIRE PRESSURE MONITORING SYSTEM INITIALIZATION •  Perform the tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.) •  Was the tire pressure monitoring system initialization performed?	Yes	Go to the next step.
		No	Perform the tire pressure monitoring system initialization. (See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.)
7	MIS-USE PREVENTION LOGIC VERIFICATION (THIRD TIME) •  Drive the vehicle for several minutes after the tire pressure monitoring warning light turns off. •  Does the tire pressure monitoring warning light illuminate?	Yes	Inspect the tires and wheels for air leakage.
		No	The tire pressure monitoring system is normal.

Diagnostic procedure for Type B DSC HU/CM

Step	Inspection	Results	Action
1	TIRE PRESSURE INSPECTION •  Inspect tire pressures while the tires are cold. (See WHEEL AND TIRE SPECIFICATION.) •  Are the tire pressures at the specification?	Yes	Go to the next step.
		No	Adjust the tire pressures to the specification while the tires are cold.
2	TIRE PRESSURE MONITORING SYSTEM INITIALIZATION •  Perform tire pressure monitoring system initialization. •  Connect the M-MDS (IDS) to DLC-2. •  After the vehicle is identified, select the following items from the initial screen of the IDS. 1.  Select "Chassis" 2.  Select "ABS/DSC" 3.  Select "TPMS Reset" •  Was the tire pressure monitoring system initialization performed?	Yes	Go to the next step.
		No	Perform the tire pressure monitoring system initialization.
3	TIRE PRESSURE MONITORNING SYSTEM WARNING LIGHT VERIFICATION •  Drive the vehicle for several minutes after the tire pressure monitoring system warning light turns off. •  Does the tire pressure monitoring system warning light illuminate?	Yes	Inspect the tires and wheels for air leakage.
		No	The tire pressure monitoring system is normal.