Test Mode Procedure

HINT:

• Operation of the tire pressure warning reset switch can be checked in TEST MODE.
• During TEST MODE, the system is not initialized by pushing the tire pressure warning reset switch. The circuit of the tire pressure warning reset switch can be inspected during this mode.

1. Turn the ignition switch off.
2. Connect Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Check that the tire pressure warning light turns on for 3 seconds and then goes off.
5. Turn the tester on.
6. Enter the following menus:
   1. Select: Chassis / Tire Pressure Monitor / Utility / Signal Check
7. Confirm that the tire pressure warning light in the combination meter blinks at 0.125 second intervals.

Fig 1: Tire Pressure Warning Light Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

• When entering signal check mode, the tire pressure warning ECU sets all the signal check DTCs first. After completing the signal check for each inspection item, the DTCs for systems that are determined to be normal by the tire pressure warning ECU will be erased.

  The DTCs for other inspection items may not be erased when only a certain signal is inspected.

• When signal check returns to normal mode, all the signal check DTCs will be erased.

1. Turn the ignition switch off.
2. Connect Techstream to the DLC3.
3. Turn the ignition switch on (IG) and the tester on.
4. Enter the following menus:
   1. Select: Chassis / Tire Pressure Monitor / Utility / Signal Check

      HINT:

      Every time the test mode DTC erasure conditions are satisfied, the tire pressure warning light turns on for 1 second. Then, the tire pressure warning light blinks at 0.125 second intervals.

5. Start the engine and allow it to run at 1000 rpm for 3 seconds or more to check the engine speed signal (C2194/94).
6. Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds or more to check the vehicle speed signal (C2191/91).
7. Loosen the valve core and rapidly reduce the pressure (at least 40 kPa (0.4 kgf/cm² , 5.8 psi) within 30 seconds) to check the transmitter data (C2181/81 to C2185/85).

   HINT:

   The transmitter ID can be transmitted by rapidly reducing the tire pressure.

8. Check that the tire pressure warning system test mode DTCs are erased.
   TEST MODE DTC REFERENCE CHART
   
   

   Test Mode DTC	Test Signal	Test Mode DTC Clear Condition
   C2181/81 to C2185/85	Transmitter Data	Receive data from the transmitter which has a registered ID in the tire pressure warning ECU
   C2191/91	Vehicle Speed Signal	Vehicle speed of 20 km/h (12 mph) or more is detected for 3 seconds or more
   C2194/94	Engine Speed Signal	Engine speed of 1000 rpm or more is detected for 3 seconds more

9. Check the tire pressure warning reset switch.
   1. Press the tire pressure warning reset switch.
   2. Check the tire pressure warning light.
      TIRE PRESSURE WARNING RESET SWITCH TEST REFERENCE
      
      

      Test Signal	Normal Condition
      Tire Pressure Warning Reset Switch	Switch ON: Tire pressure warning light turns on. Switch OFF: Tire pressure warning light blinks at 0.125 second intervals.

10. Result

    HINT:

    After the signal check is completed, check for a signal check DTC to confirm the system status.

    RESULT CHART
    
    

    Condition	Procedure
    Test mode DTC is output	Repair the faulty part and enter SIGNAL CHECK again
    Test mode DTCs are cleared	No problem

11. End of SIGNAL CHECK
    1. After completing the test mode (SIGNAL CHECK), Turn the ignition switch off and disconnect the tester.
12. DTC of SIGNAL CHECK (TEST DIAGNOSIS)
    1. If a trouble code is displayed during the test mode DTC check, check the circuit listed for that code. For details of each code, refer to the table below.
       DTC TROUBLE DETECTION REFERENCE CHART
       
       

       DTC No.	Detection Item	Trouble Area
       C2181/81	Transmitter ID1 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU
       C2182/82	Transmitter ID2 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU
       C2183/83	Transmitter ID3 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU
       C2184/84	Transmitter ID4 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU
       C2185/85	Transmitter ID5 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Harness or connector Tire pressure warning ECU
       C2191/91	Vehicle speed signal error	Combination meter Vehicle speed sensor Harness or connector Tire pressure warning ECU
       C2194/94	Engine speed signal error	ECM Harness or connector Tire pressure warning ECU