Tire Pressure Warning System - Diagnostics: Other Toyota Matrix E130

INITIALIZATION

Note. This system requires initialization after changing tires or wheels, or after rotating the tires. Be sure to adjust the tire pressure to the specified value before initialization.

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1. INITIALIZING THE TIRE PRESSURE WARNING SYSTEM Check and adjust the tire pressure to the specified value. TIRE PRESSURE WARNING SYSTEM SPECIFICATION Tire Size Specified Value (Front) Specified Value (Rear) P205/55 R16 89H P215/50 ZR17 P215/50 R17 90H 220 kPa (2.2 kgf/cm 2 , 31 psi) 220 kPa (2.2 kgf/cm 2 , 31 psi) P205/55 R16 89H (4WD) 240 kPa (2.4 kgf/cm 2 , 34 psi) 220 kPa (2.2 kgf/cm 2 , 31 psi) With the vehicle stopped, turn the ignition switch to the ON position. Press and hold the tire pressure warning reset switch until the tire pressure warning lamp blinks 3 times at 1 second intervals. HINT: If the tire pressure warning lamp does not blink, perform the initialization again. (With the ignition switch off, perform the procedure above starting from step b .) Drive the vehicle at 19 mph (30 km/h) or more, to complete initialization of the skid control ECU. (It takes more than one hour.) HINT: If the tire pressure warning lamp repeats a cycle of ON (0.5 sec.) and OFF (2.5 sec.) while the vehicle is being driven, initialization may have failed. If so, perform the initialization again. (Turn the ignition switch off and retry from step a .) After initialization is completed, the skid control ECU monitors the tire pressure by using the wheel speed sensors. To verify that the system has been initialized, check the length of time the tire pressure warning lamp is on after turning the ignition switch to the ON position. Not initialized: 4 sec. Initialized: 3 sec.

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1. TEST MODE (USING SST CHECK WIRE) Make sure that the ignition switch is off. Using SST, connect terminals TS and CG of the DLC3. SST 09843-18040 Turn the ignition switch to the ON position. Press the tire pressure warning reset switch. Check that the tire pressure warning lamp comes on. HINT: Unless (d) is performed, the tire pressure warning lamp remains off while in test mode. When there is a problem with the tire pressure warning system, the tire pressure warning lamp blinks at 0.5 second intervals. If the lamp output result is not normal, proceed to the problem symptoms table or TS terminal circuit. PROBLEM SYMPTOMS CHART Item «PROBLEM SYMPTOMS TABLE»(ref-225876-S12862181972006032300000) «TS AND CG TERMINAL CIRCUIT (W/ VSC)»(ref-225879-S19376645252006032300000) «TS TERMINAL CIRCUIT (W/O VSC)»(ref-225877-S37778547942006032300000) Turn the ignition switch off. Remove the SST from the DLC3. SST 09843-18040 Turn the ignition switch to the ON position. Check that the tire pressure warning lamp goes off.
2. TEST MODE (USING THE HAND-HELD TESTER) Connect the hand-held tester to the DLC3. Turn the ignition switch to the ON position. Select "SIGNAL CHECK", and proceed to check with the hand-held tester. Press the tire pressure warning reset switch. Check that the tire pressure warning lamp comes on. HINT: Unless (d) is performed, the tire pressure warning lamp remains off while in test mode. When there is a problem with the tire pressure warning system, the tire pressure warning lamp blinks at 0.5 second intervals. If the lamp output result is not normal, proceed to the problem symptoms table (see «PROBLEM SYMPTOMS TABLE»(ref-225876-S12862181972006032300000) ). Turn the ignition switch off. Turn the ignition switch to the ON position. Check that the tire pressure warning lamp goes off.

TERMINALS OF ECU

SKID CONTROL ECU (w/ VSC)

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1. TERMINAL DESCRIPTION TERMINAL DESCRIPTION Symbols (Terminal No.) Terminal Description TSI (7) Ambient temperature sensor signal D/G (13) Diagnosis tester communication signal WTIR (26) Tire pressure warning lamp signal STP (27) Stop lamp switch assy input signal GND1 (32) Ground INIT (41) Tire pressure warning reset switch
2. TERMINAL INSPECTION Disconnect the connector and measure the voltage on the wire harness side. HINT: Voltage can not be measured with the connector connected to the skid control ECU as the connector is water resistance. TERMINAL INSPECTION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition STP (27) - GND1 (32) G-W - W-B Stop lamp switch assy input signal Brake pedal depressed 10 to 14 V STP (27) - GND1 (32) G-W - W-B Stop lamp switch assy input signal Brake pedal released Below 1.5 V GND1 (32) - Body ground W-B - Body ground Ground Always Below 1 V SKID CONTROL ECU (w/o VSC)
3. TERMINAL DESCRIPTION TERMINAL DESCRIPTION Symbols (Terminal No.) Terminal Description GND1 (1) Ground D/G (13) Diagnosis tester communication signal STP (14) Stop lamp switch assy input signal WTIR (33) Tire pressure warning lamp signal TSI (34) Ambient temperature sensor signal INIT (41) Tire pressure warning reset switch
4. TERMINAL INSPECTION Disconnect the connector and measure the voltage on the wire harness side. HINT: Voltage can not be measured with the connector connected to the skid control ECU as the connector is water resistance. TERMINAL INSPECTION Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND1 (1) - Body ground W-B - Body ground Ground Always Below 1 V STP (14) - GND1 (1) G-W - W-B Stop lamp switch assy input signal Brake pedal depressed 10 to 14 V STP (14) - GND1 (1) G-W - W-B Stop lamp switch assy input signal Brake pedal released Below 1.5 V

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1. DIAGNOSTIC SYSTEM Inspect the battery voltage. Battery voltage: 11 to 14 V If voltage is below 11 V, recharge the battery before proceeding. Check the DLC3. The vehicle's skid control ECU uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format. Verify conditions listed in the table below: TERMINAL CONDITION Terminal No. Terminal name Connection/Voltage or Resistance Condition 7 SIL Bus + Line/Pulse generation During transmission 4 CG Chassis Ground to Body Ground/1 ohm or less Always 16 BAT Battery Positive to Body Ground/10 to 14 V Always HINT: If the hand-held tester displays "UNABLE TO CONNECT TO VEHICLE" when the cable of the hand-held tester is properly connected to the DLC3, the ignition switch is turned to the ON position and the tester is operated, there is a problem on either the vehicle side or tester side. If communication is normal when the tester is connected to another vehicle, inspect the DLC3 on the original vehicle. If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tester itself. In this case, consult the Service Department listed in the tester's instruction manual.
2. CHECK WARNING LAMP Turn the ignition switch to the LOCK position. When the ignition switch is turned to the ON position, the lamp should come on for 3 to 4 seconds and then go off. HINT: If the tire pressure warning lamp has a defect, check the tire pressure warning lamp output patterns and the problem symptoms table (see «PROBLEM SYMPTOMS TABLE»(ref-225876-S12862181972006032300000) ).
3. TIRE PRESSURE WARNING LAMP CHART: HINT: When the skid control ECU does not operate properly, the ABS warning lamp comes on to indicate an ABS system malfunction.