Diagnosis System

TIRE PRESSURE MONITORING: TIRE PRESSURE WARNING SYSTEM: DIAGNOSIS SYSTEM; 2013 MY FR-S [03/2012 -]

1. CHECK WARNING LIGHT

NOTICE:
* 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.
* When the malfunction has been corrected, the tire pressure warning light does not illuminate.
* When the tire pressure warning light illuminates, immediately check the tire pressures of the tire and adjust it to the specified value(s).
* 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 Tire Pressure Warning Light Circuit.

(a) Turn the ignition switch to ON.

(b) Check that the tire pressure warning light illuminates for 3 seconds.









2. WHAT TO CONSIDER WHEN TIRE PRESSURE WARNING LIGHT ILLUMINATES

(a) 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.

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

(1) When all of the tires and wheels that have the tire pressure warning valve and transmitters registered with the door control receiver have not been installed.

(2) When all of the transmitter ID codes are not registered with the door control 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 is depleted.

(c) The system may become disabled in the following conditions (when the condition 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 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.

3. 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.





* *1: Illuminates and goes off repeatedly at 0.5 second intervals, and illuminates after 1 minute.









* *2: Illuminates and goes off repeatedly at 0.125 second intervals.









4. Normal mode DTCs

(a) DTCs are stored in the door control receiver and output by the blinking of tire pressure warning light or by using the Techstream Reading and Clearing Diagnostic Trouble Codes.

5. Test mode (signal check mode) DTCs

(a) By switching from normal mode into test mode (input signal check), you can inspect the door control receiver, each tire pressure warning valve and transmitter Test Mode Procedure.

6. FAIL-SAFE FUNCTION

(a) 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.

(b) The result of this diagnosis code is stored in the door control receiver.