Toyota Tacoma (2015-2018) Service Manual: Diagnosis System
DIAGNOSIS SYSTEM
DIAGNOSIS FUNCTION
(a) The diagnosis function turns off the cruise control indicator, illuminates the master warning light and displays a warning message when a malfunction is detected. When a malfunction is detected in the dynamic radar cruise control system, DTCs are stored in the ECM or millimeter wave radar sensor assembly.
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*1 |
Cruise Control Indicator (Constant Speed Control Mode) |
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*2 |
Cruise Control Indicator (Vehicle-to-vehicle Distance Control Mode) |
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*3 |
Master Warning Light |
NOTICE:
- If DTCs related to the communication system are stored, "Cruise Control Malfunction Visit Your Dealer", which is displayed in the combination meter assembly, disappears when the system returns to normal.
- If DTCs not related to the communication system are stored, "Cruise Control Malfunction Visit Your Dealer", which is displayed in the combination meter assembly, disappears when the ignition switch off then back ON after the system returns to normal.
DESCRIPTION
(a) The ECM and millimeter wave radar sensor assembly control the dynamic radar cruise control system of the vehicle. The data and DTCs relating to the dynamic radar cruise control system can be read from the DLC3 of the vehicle. Use the Techstream to check and solve the problem.
CHECK DLC3
(a) Check the DLC3.
Click here .gif)
CHECK INDICATOR
(a) Turn the ignition switch to ON.
(b) Check that the cruise control indicator illuminates when the dynamic radar cruise control system is turned on using the cruise control main switch (ON-OFF button), and that the indicator turns off when the dynamic radar cruise control system is turned off using the cruise control main switch (ON-OFF button).
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*1 |
Cruise Control Indicator (Constant Speed Control Mode) |
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*2 |
Cruise Control Indicator (Vehicle-to-vehicle Distance Control Mode) |
Road Test
ROAD TEST
PROBLEM SYMPTOM CONFIRMATION
HINT:
The dynamic radar cruise control system has 2 cruise control modes:
constant speed control mode and vehicle-to-vehicle distance control mode ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
Before replacing the ECM, refer to Registration.
w/o Smart Key System: Click here
w/ Smart Key System: Click here
When the millimeter wave rad ...
Other materials:
Additional Key cannot be Registered
DESCRIPTION
If additional registration is not possible, a malfunction in the certification
ECU (smart key ECU assembly), engine switch, electrical key transmitter sub-assembly
or steering lock ECU (steering lock actuator or UPR bracket assembly) is suspected.
CAUTION / NOTICE / HINT
NOTICE ...
Disassembly
DISASSEMBLY
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for both the LH and RH sides.
The procedure described below is for the LH side.
PROCEDURE
1. REMOVE NO. 1 HEADLIGHT BULB
(a) Turn the No. 1 headlight bulb in the direction indicated by the arrow
i ...
System Diagram
SYSTEM DIAGRAM
HINT:
Each tire pressure warning valve and transmitter sends its transmitter ID, temperature
and tire pressure information to the tire pressure warning ECU and receiver.
Transmitting ECU (Transmitter)
Receiving ECU
Signal
Communicat ...
