Diagnosis System

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DLC3 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS )
DIAGNOSIS SYSTEM
1. Warning light and indicator
  1. When there is a problem with the tire pressure warning system, the tire pressure warning light blinks at 0.5 second intervals, and turns on after 1 minute.
    NOTE: When the malfunction has been corrected, the tire pressure warning light does not turn on.
    
    Fig 1: Identifying Tire Pressure Warning Light
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. DTCs (Normal mode)
  1. DTCs are memorized in the tire pressure warning ECU and read by the blinks of the tire pressure warning light or by using a Techstream (See DTC CHECK / CLEAR ).
3. Test mode
  1. By switching from normal mode into test mode (input signal check), you can inspect the tire pressure warning antenna and receiver, each tire pressure warning valve and transmitter, the engine speed signal and the vehicle speed sensor (See TEST MODE PROCEDURE ).

CHECK WARNING LIGHT

Turn the ignition switch to ON.

Check that the tire pressure warning light turns on for 3 seconds.

If the warning check result is not normal, proceed to the troubleshooting for the tire pressure warning light circuit.

TROUBLE AREA REFERENCE

Trouble Area	See Procedure
Tire pressure warning light circuit	TIRE PRESSURE WARNING LIGHT CIRCUIT

TIRE PRESSURE WARNING LIGHT CHART

HINT:

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

Fig 2: Identifying Tire Pressure Warning Light

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TIRE PRESSURE WARNING LIGHT CHART

Condition

Immediately after turning the ignition switch to ON

Always

Warning light output pattern

Turns on for 3 seconds

Goes off

Turns on

Blinks for 1 minute and then illuminates (⁽¹⁾)

Blinks (⁽²⁾)

Blinks (⁽³⁾)

Output DTC

Normal

◦

Low tire pressure

◦

System fail

◦

Test mode

◦

ECU connector poorly connected

◦ (⁽⁴⁾)

TC ground (DTC is output)

◦

TC ground (DTC is not output)

◦

⁽¹⁾	Turns on and goes off repeatedly at 0.5 second intervals, and turns on after 1 minute.

⁽²⁾	Turns on and goes off repeatedly at 0.125 second intervals.

⁽³⁾	Turns on and goes off repeatedly at 0.25 seconds interval.

⁽⁴⁾	When determining if there is a short circuit (1 second), the light is off. Then it blinks at 0.5 second intervals, and turns on after 1 minute.

Fig 3: Tire Pressure Warning Light Blinking Pattern For 0.25 Seconds Interval

Fig 4: Tire Pressure Warning Light Blinking Pattern For 0.125 Seconds Interval

Fig 5: Tire Pressure Warning Light Blinking Pattern For 0.25 Seconds Interval

Fig 6: Tire Pressure Warning Light Blinking Pattern For 0.5 Seconds Interval