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 the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Check that the tire pressure warning light comes on for 3 seconds and then goes off.
5. Turn the Techstream on.
6. Enter the following menus: 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 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 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 the Techstream to the DLC3.
3. Turn the ignition switch to ON.
4. Turn the Techstream on.
5. Enter the following menus: Chassis / Tire Pressure Monitor / Utility / Signal Check.

   HINT: 

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

6. Start the engine and allow it to run at 1000 RPM for 3 seconds or more to check the engine speed signal (C2194/94).
7. Drive the vehicle at 20 km/h (12 mph) or more for 3 seconds or more to check the vehicle speed signal (C2191/91).
8. Loosen the valve core and rapidly reduce the pressure (at least 40 kPa (0.4 kg/cm² , 5.8 psi) within 30 seconds or more) to check the transmitter data (C2181/81 to C2184/84).

   HINT: 

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

9. Check that the tire pressure warning system test mode DTCs are erased.

   Test Mode DTC	Test Signal	Test Mode DTC Clear Condition
   C2181/81 to C2184/84	Transmitter Data	Data is received 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 or more

10. Check the tire pressure warning reset switch.
    1. Press the tire pressure warning reset switch.
    2. Check the tire pressure warning light.

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

11. Result

    HINT: 

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

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

12. End of SIGNAL CHECK
    1. After completing the test mode (SIGNAL CHECK), turn the ignition switch off and disconnect the Techstream.
13. 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 "See Procedure" below.

       DTC No.	Detection Item	Trouble Area	See Procedure
       C2181/81	Transmitter ID1 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Wire harness or connector Tire pressure warning ECU	Refer to DTC C2121/21: No Signal from Transmitter ID1; DTC C2122/22: No Signal from Transmitter ID2; DTC C2123/23: No Signal from Transmitter ID3; DTC C2124/24: No Signal from Transmitter ID4; DTC C2181/81: Transmitter ID1 not Received (Test Mode DTC); DTC C2182/82: Transmitter ID2 not Received (Test Mode DTC); DTC C2183/83: Transmitter ID3 not Received (Test Mode DTC); DTC C2184/84: Transmitter ID4 not Received (Test Mode DTC)
       C2182/82	Transmitter ID2 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Wire harness or connector Tire pressure warning ECU	Refer to DTC C2121/21: No Signal from Transmitter ID1; DTC C2122/22: No Signal from Transmitter ID2; DTC C2123/23: No Signal from Transmitter ID3; DTC C2124/24: No Signal from Transmitter ID4; DTC C2181/81: Transmitter ID1 not Received (Test Mode DTC); DTC C2182/82: Transmitter ID2 not Received (Test Mode DTC); DTC C2183/83: Transmitter ID3 not Received (Test Mode DTC); DTC C2184/84: Transmitter ID4 not Received (Test Mode DTC)
       C2183/83	Transmitter ID3 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Wire harness or connector Tire pressure warning ECU	Refer to DTC C2121/21: No Signal from Transmitter ID1; DTC C2122/22: No Signal from Transmitter ID2; DTC C2123/23: No Signal from Transmitter ID3; DTC C2124/24: No Signal from Transmitter ID4; DTC C2181/81: Transmitter ID1 not Received (Test Mode DTC); DTC C2182/82: Transmitter ID2 not Received (Test Mode DTC); DTC C2183/83: Transmitter ID3 not Received (Test Mode DTC); DTC C2184/84: Transmitter ID4 not Received (Test Mode DTC)
       C2184/84	Transmitter ID4 not received	Tire pressure warning valve and transmitter Tire pressure warning antenna and receiver Wire harness or connector Tire pressure warning ECU	Refer to DTC C2121/21: No Signal from Transmitter ID1; DTC C2122/22: No Signal from Transmitter ID2; DTC C2123/23: No Signal from Transmitter ID3; DTC C2124/24: No Signal from Transmitter ID4; DTC C2181/81: Transmitter ID1 not Received (Test Mode DTC); DTC C2182/82: Transmitter ID2 not Received (Test Mode DTC); DTC C2183/83: Transmitter ID3 not Received (Test Mode DTC); DTC C2184/84: Transmitter ID4 not Received (Test Mode DTC)
       C2191/91	Vehicle speed signal error	Vehicle speed sensor Combination meter assembly Wire harness or connector Tire pressure warning ECU	Refer to DTC C2191/91: Vehicle Speed Signal Error (Test Mode DTC)
       C2194/94	Engine speed signal error	ECM Harness or connector Tire pressure warning ECU	Refer to DTC C2194/94: Engine Speed Signal Error (Test Mode DTC)