Test Mode Procedure

HINT:

• Operation of the tire pressure warning reset switch can be checked in signal check mode.
• During signal check 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.

HINT:

• When entering signal check mode, the tire pressure warning ECU sets all the signal check DTCs (test mode DTCs) first.

  After the tire pressure warning ECU completes the signal check for each inspection item, the DTCs for systems that are determined to be normal will be cleared.

  Fig 1: Tire Pressure Warning Light Blinking Pattern

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

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 conditions to clear signal check DTCs are met, the tire pressure warning light comes on for 1 second. Following this, 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 each valve core and rapidly reduce the pressure (at least 40 kPa (0.4 kg/cm² , 5.8 psi) within 30 seconds) to check the transmitter data (C2181/ 81 to C2184/84).

   HINT:

   The transmitter ID will be transmitted if the tire pressure is reduced rapidly.

9. Check that the tire pressure warning system signal check DTCs are erased.
   TIRE PRESSURE WARNING SYSTEM DTC CHART
   
   

   Signal Check DTC	Test Signal	Signal Check 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.
    TIRE PRESSURE WARNING LIGHT REFERENCE
    
    

    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 signal check DTCs to confirm the system status.

    RESULT REFERENCE
    
    

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

12. Make a note of any signal check DTCs that are output.
13. End of signal check mode
    1. After completing signal check mode, turn the ignition switch off and disconnect the Techstream.
14. Signal check (test mode) DTCs
    1. If a trouble code was displayed during the signal check mode DTC check, check the circuit listed for that code. For details of each code, refer to See Procedure below.