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 DLC3.
  3. Turn the ignition switch on (IG).
  4. Check that the tire pressure warning light comes on for 3 seconds and then goes off.
  5. Turn the tester 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 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.

Fig 1: Combination Meter Blinking Pattern

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   HINT:

   Every time the test mode DTC clearing 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.

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 12 mph (20 km/h) 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 (0.41 kg/cm² , 5.8 psi) within 30 seconds or more) 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.
   DTC TEST MODE REFERENCE
   
   

   Test Mode DTC	Test Signal	Test Mode DTC Clearing Condition
   C2181/81  to C2185/85	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 12 mph (20 km/h) 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

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

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

10. Result

    HINT:

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

    DTC TEST MODE REFERENCE
    
    

    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 "Refer to" below.
    DTC 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
    C2183/83	Transmitter ID3 not received
    C2184/84	Transmitter ID4 not received
    C2185/85	Transmitter ID5 not received
    C2191/91	Vehicle speed signal error	Combination meter assembly Vehicle speed sensor Harness or connector Tire pressure warning ECU
    C2194/94	Engine speed signal error	ECM Harness or connector Tire pressure warning ECU