DIAGNOSIS SYSTEM CHECK WARNING LIGHT NOTICE:
(a) Turn the ignition switch to ON.
(b) Check that the tire pressure warning light illuminates for 3 seconds. 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, a tire may have a slow air leak. (b) The system is disabled under the following conditions (when the condition returns to normal, the system will work properly). (1) When all of the tire and wheel assemblies that have tire pressure warning valve and transmitters registered with the tire pressure warning ECU and receiver have not been installed. (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 a tire pressure warning valve and transmitter battery is depleted. (c) The system may be disabled under the following conditions (when the condition returns to 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. (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 ON.
NORMAL MODE DTC (a) DTCs are stored in the tire pressure warning ECU and receiver and output by blinking the tire pressure warning light or by using the Techstream. Click here TEST MODE (SIGNAL CHECK MODE) DTC (a) The tire pressure warning ECU and receiver, tire pressure warning valve and transmitter, and initialization signal can be checked by switching from normal mode to test mode (signal check mode/input signal check). Click here |
Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Terminals Of Ecu
TERMINALS OF ECU CHECK TRANSPONDER KEY ECU ASSEMBLY (a) Disconnect the J26 transponder key ECU assembly connector. (b) Measure the resistance and voltage according to the value(s) in the table below. HINT: Measure the values on the wire harness side with the connector disconnected. Tester Connection ...