Toyota Tacoma (2015-2018) Service Manual: Test Mode Procedure

Toyota Tacoma (2015-2018) Service Manual / Tire And Wheel / Tire Pressure Warning System / Test Mode Procedure

TEST MODE PROCEDURE

1. TEST MODE (SIGNAL CHECK MODE) PROCEDURE

HINT:

When entering test mode (signal check mode), the tire pressure warning ECU and receiver stores all the test mode (signal check mode) DTCs first.
After the tire pressure warning ECU and receiver completes the signal check for each inspection item, the DTCs for systems that are determined to be normal will be cleared. The DTCs for other inspection items may not be cleared when only a certain signal is inspected.
When test mode (signal check mode) returns to normal mode, all the test mode (signal check mode) DTCs will be cleared.
Operation of the tire pressure warning reset switch can be checked in test mode (signal check mode).
During test mode (signal check mode), the system will not be initialized by pushing the tire pressure warning reset switch. The circuit of the tire pressure warning reset switch can be inspected during this mode.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Enter the following menus: Chassis / Tire Pressure Monitor / Utility / Signal Check.

Text in Illustration

*a	0.125 sec.
*b	ON
*c	OFF

HINT:

Every time the test mode (signal check mode) DTC clear conditions are satisfied, the tire pressure warning light illuminates for 1 second. Following this, the tire pressure warning light blinks at 0.125 second intervals.

(e) Press the tire pressure warning reset switch (DTC C2198/98).

(f) Wait for 1.5 minutes with the vehicle stopped, or drive the vehicle at a speed of 50 km/h (31 mph) or more for 1 minute (DTCs C2181/81 to C2184/84).

HINT:

The tire pressure warning valve and transmitters send signals to the tire pressure warning ECU and receiver once every 1.5 minutes while the vehicle is stopped and once every minute while driving.

(g) Check that the tire pressure warning system test mode (signal check mode) DTCs are cleared.

Test Mode (Signal Check Mode) DTC	Test Signal	Test Mode (Signal Check Mode) DTC Clear Condition
C2181/81 to C2184/84	Transmitter Data	Data is received from the relevant transmitter which has a registered ID in the tire pressure warning ECU and receiver.
C2198/98	Tire Pressure Warning Reset Switch Signal	A signal is received indicating that the tire pressure warning reset switch is pressed.

(h) Result

HINT:

After the signal check is completed, check for test mode (signal check mode) DTCs to confirm the system status.

Condition	Procedure
Test mode (signal check mode) DTCs are output	Repair the faulty part and enter Signal Check again
Test mode (signal check mode) DTCs are cleared	No problem

(i) End of test mode (signal check mode)

(1) After completing test mode (signal check mode), turn the ignition switch off and disconnect the Techstream.

(j) Test mode (signal check mode) DTCs

(1) If a trouble code is displayed during the test mode (signal check mode) DTC check, check the diagnosis procedure listed for that code. For details of each code, refer to Link below.

DTC No.	Detection Item	Trouble Area
C2181/81	Transmitter ID1 not received	Tire pressure warning valve and transmitter Wire harness or connector Tire pressure warning ECU and receiver
C2182/82	Transmitter ID2 not received	Tire pressure warning valve and transmitter Wire harness or connector Tire pressure warning ECU and receiver
C2183/83	Transmitter ID3 not received	Tire pressure warning valve and transmitter Wire harness or connector Tire pressure warning ECU and receiver
C2184/84	Transmitter ID4 not received	Tire pressure warning valve and transmitter Wire harness or connector Tire pressure warning ECU and receiver
C2198/98	Initialization switch error	Tire pressure warning reset switch Wire harness or connector Tire pressure warning ECU and receiver

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (a) Disconnect the T14 tire pressure warning ECU and receiver connector and measure the voltage and resistance on the wire harness ...

Data List / Active Test

DATA LIST / ACTIVE TEST 1. READ DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing ...

Other materials:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each sy ...

Operation Check
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Data List / Active Test
DATA LIST / ACTIVE TEST 1. DATA LIST Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be ...