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) |
Terminals Of Ecu
TERMINALS OF ECU
CHECK ECM
HINT:
The standard voltage, resistance and waveform between each pair of the ECM terminals
is shown in the table below. The appropriate conditions for checking each p ...
Dtc Check / Clear
DTC CHECK / CLEAR
CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Radar Cruise 1*1 / ...
Other materials:
Front Differential Oil Temperature Sensor Circuit Low (P17C7)
DESCRIPTION
This DTC is output when a short to ground in the oil temperature sensor is detected.
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
P17C7
Front Differential Oil Temperature Sensor Circuit Low
...
Engine Hood Courtesy Switch
Components
COMPONENTS
ILLUSTRATION
Inspection
INSPECTION
PROCEDURE
1. INSPECT HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)
(a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below.
Text in Illustration
*a
...
System Diagram
SYSTEM DIAGRAM
Circuit Description
Component
Outline
Steering Lock ECU (Steering Lock Actuator or UPR Bracket Assembly)
The steering is locked and unlocked by communicating with the
certification ECU (smart key ECU assembly) via L ...
