Tire Pressure Warning System (For Hatchback) Diagnosis System

Suspension. Yaris. Ncp93, 131
Tire Pressure Monitoring. Yaris. Ncp93, 131

  1. CHECK WARNING LIGHT

  1. WHAT TO CONSIDER WHEN TIRE PRESSURE WARNING LIGHT ILLUMINATES

  1. TIRE PRESSURE WARNING LIGHT AND INDICATOR CHART

  1. Normal mode DTCs

  1. Test mode (signal check mode) DTCs

  1. FAIL-SAFE FUNCTION

Tire Pressure Warning System (For Hatchback) -- Diagnosis System



CHECK WARNING LIGHT
NOTICE:
  1. When there is a problem with the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals, and illuminates after 1 minute.
  2. When the malfunction has been corrected, the tire pressure warning light does not illuminate.
  3. When the tire pressure warning light illuminates, immediately check the tire pressures of the tire and adjust it to the specified value(s).
  4. After the ignition switch is turned to ON, the tire pressure warning light illuminates for 3 seconds and then goes off. If the warning light does not illuminate for 3 seconds, proceed to the troubleshooting for the tire pressure warning light circuit (YARIS_NCP93 RM000000XN3050X.html).


    Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Diagnosis System

  1. Turn the ignition switch to ON.

    Text in Illustration
    *1
    		Tire Pressure Warning Light

  2. Check that the tire pressure warning light illuminates for 3 seconds.


WHAT TO CONSIDER WHEN TIRE PRESSURE WARNING LIGHT ILLUMINATES

  1. When the tire pressure warning light does not go off, or when it illuminates during driving, check the tire pressure. If the tire pressure warning light illuminates within several hours after adjusting the tire pressure, the tire may have a slow air leak.

  2. The system is disabled in the following conditions (when the condition becomes normal, the system will work properly).

    1. When all tire pressure warning valve and transmitters registered with the tire pressure warning ECU and receiver have not been mounted to the tires and wheels.

    2. When all of the transmitter ID codes are not registered with the tire pressure warning ECU and receiver.

    3. When the tire pressure is abnormally high (absolute pressure: 480 kPa (4.9 kgf/cm2, 70 psi) or more; relative pressure: 380 kPa (3.9 kgf/cm2, 55 psi) or more).

    4. When the tire pressure warning valve and transmitter battery level has decreased.

  3. The system may become disabled in the following conditions (when the conditions becomes normal, the system will work properly).

    1. When electric devices or facilities using similar radio frequencies are nearby.

    2. When a wireless device or other equipment operating at a similar frequency is in use in the vehicle.

    3. When a window tint that affects the radio wave signals is installed.

    4. When there is a lot of snow or ice on the vehicle, in particular, around the wheels or wheel housing.

    5. When non-genuine wheels are used.

    6. When tire chains are used.

    7. When aftermarket tire repair sealant is used.

      CAUTION:
      After use of tire repair sealant, replacement of the tire pressure warning valve and transmitter is required to ensure normal system operation. (Normal system operation cannot be ensured by only repairing or replacing the tire.)

TIRE PRESSURE WARNING LIGHT AND INDICATOR CHART

HINT:
The table below indicates the state of the tire pressure warning light after the ignition switch is turned to ON.


Immediately after turning the ignition switch to ON
Always
Warning light output pattern
Illuminates for 3 seconds
Goes off
Illuminates
Blinks*1
Blinks*2
Blinks*3
Blinks*4
Outputs DTC
Normal
○
○
-
-
-
-
-
-
Low tire pressure
○
-
○
-
-
-
-
-
System failure
○
-
-
○
-
-
-
-
Test mode (signal check mode)
○
-
-
-
○
-
-
-
Initialization
○
-
-
-
-
○
-
-
ECU connector poorly connected
-
-
-
○
-
-
-
-
TC grounded (DTC is output)
○
-
-
-
-
-
-
○
TC grounded (DTC is not output)
○
-
-
-
-
-
○
-

  1. Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Diagnosis System
    *1: Illuminates and goes off repeatedly at 0.5 second intervals, and illuminates after 1 minute.
    Text in Illustration
    *a
    		ON
    *b
    		OFF
    *c
    		0.5 seconds
    *d
    		1 minute

  2. Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Diagnosis System
    *2: Illuminates and goes off repeatedly at 0.125 second intervals.
    Text in Illustration
    *a
    		ON
    *b
    		OFF
    *c
    		0.125 seconds

  3. Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Diagnosis System
    *3: Blinks 3 times (1 second on, 1 second off).
    Text in Illustration
    *a
    		ON
    *b
    		OFF
    *c
    		1 second

  4. Yaris. Ncp93, 131.Tire Pressure Monitoring.Tire Pressure Warning System (For Sedan).Tire Pressure Warning System (For Hatchback) Diagnosis System
    *4: Illuminates and goes off repeatedly at 0.25 second intervals.
    Text in Illustration
    *a
    		ON
    *b
    		OFF
    *c
    		0.25 seconds

Normal mode DTCs

  1. DTCs are stored in the tire pressure warning ECU and receiver and output by the blinking of tire pressure warning light or by using the Techstream (YARIS_NCP93 RM000000XMX07HX.html).


Test mode (signal check mode) DTCs

  1. By switching from normal mode into test mode (input signal check), you can inspect the tire pressure warning ECU and receiver, each tire pressure warning valve and transmitter and tire pressure warning reset switch (YARIS_NCP93 RM000000XN007SX.html).


FAIL-SAFE FUNCTION

  1. When a system malfunction occurs in the tire pressure warning system, the tire pressure warning light illuminates after blinking for 1 minute to inform the driver of the system failure.

  2. The result of this diagnosis code is stored in the tire pressure warning ECU and receiver.