ON-BOARD DIAGNOSTIC SYSTEM FUNCTION (TIRE PRESSURE MONITORING SYSTEM)

• The malfunction detection function detects malfunctions in the input/output signal system of the instrument cluster based on abnormal signals from the wheel units when the ignition is ON or driving the vehicle.

• The TPMS warning light illuminates for approx. 3.0 s when the ignition is ON to inspect for open circuits in the light.

• When the malfunction detection function detects a malfunction, the TPMS warning light illuminates to advise the driver. Using the external tester communication function, DTCs can be output to the DLC-2 via the CAN communication line. At the same time, malfunction detection results are sent to the memory functions.

• The memory function stores DTCs for malfunctions in input/output signal systems. With this function, once a DTC is stored it is not cleared after the ignition has been switched to off, even if the malfunctioning signal system has returned to normal.

• Since instrument cluster has a built-in non-volatile memory, DTCs are not cleared even if the battery is removed. Therefore, it is necessary to clear the memory after performing repairs. Refer to the Workshop Manual for the DTC clearing procedure.

• When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the store data using scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

am6xun00000804

Description	DTC No.	TPMS Warning Light Illumination Condition
Low tire pressure	C0077:00	Illuminated
Wheel unit No.1 internal malfunction	C2011:49	Illuminated
Wheel unit No.2 internal malfunction	C2012:49	Illuminated
Wheel unit No.3 internal malfunction	C2013:49	Illuminated
Wheel unit No.4 internal malfunction	C2014:49	Illuminated
Wheel unit No.1 (No response)	C2011:87	Illuminated
Wheel unit No.2 (No response)	C2012:87	Illuminated
Wheel unit No.3 (No response)	C2013:87	Illuminated
Wheel unit No.4 (No response)	C2014:87	Illuminated
Communication error with PCM	U0100:00	Illuminated
Communication error with keyless receiver	U0127:00	Illuminated
Incomplete configuration	U0300:00	Illuminated
Erratic signal from PCM	U0401:68	Illuminated
Incomplete configuration	U2100:00	Illuminated
Instrument cluster general memory failure	U3000:42	Illuminated
Ambient temperature signal failure	—	Illuminated

• The snapshot data consists of data for vehicle and TPMS operation conditions when malfunctions in the TPMS are detected and recorded in the instrument cluster.

• Snapshot data is recorded at the instant the TPMS warning light illuminates. All of the currently detected DTCs are recorded in the instrument cluster.

• Snapshot data items are not displayed, according to detected DTC.

Snapshot data item	Unit	Definition	Description
AAT	°C, °F	Ambient air temperature	Ambient air temperature signal is input from the ambient temperature sensor.
TOTAL_DIST	km, mile	Displays distance of odometer when a DTC is detected.	Displays distance of odometer when a DTC is detected. (display four last digits)
VSS	KPH, MPH	Vehicle speed	Vehicle speed signal is input from the speed sensor.
WU1_P WU2_P WU3_P WU4_P	Pa, psi, kgf/cm²	Tire pressure	Tire pressure signal is input from the wheel unit.
WU1_T WU2_T WU3_T WU4_T	°C, °F	Tire internal air temperature	Tire internal air temperature signal is input from the wheel unit.