Toyota Tacoma (2015-2018) Service Manual: Parking Brake Switch Circuit
DESCRIPTION
This circuit is from the parking brake switch assembly to the radio and display receiver assembly.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK VEHICLE SIGNAL |
|
(a) Display the "Vehicle Signal Check Mode" screen (See page
|
|
(b) Check that the display changes between ON and OFF according to the parking brake operation.
OK:
|
Parking Brake Condition |
Display |
|---|---|
|
Applied |
ON |
|
Released |
OFF |
HINT:
This display is updated once per second. As a result, it is normal for the display to lag behind the actual parking brake operation.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY) |
(a) Disconnect the R31 radio and display receiver assembly connector.
(b) Disconnect the P6 parking brake switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R31-15 (PKB) - P6-1 |
Always |
Below 1 Ω |
|
R31-15 (PKB) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
INSPECT PARKING BRAKE SWITCH ASSEMBLY |
(a) Remove the parking brake switch assembly.
(b) Inspect the parking brake switch assembly (See page
.gif)
).
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPLACE PARKING BRAKE SWITCH ASSEMBLY |
Illumination Circuit
DESCRIPTION
Power is supplied to the radio and display receiver assembly and steering pad
switch assembly illumination when the light control switch is in the TAIL or HEAD
position.
WIRING DIAGR ...
Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the radio and display receiver
assembly detects it and stops output to the speakers.
Thus sound cannot be heard from the speakers ...
Other materials:
Center Differential Lock Position Switch (C1282)
DESCRIPTION
DTC C1282 is stored only in test mode.
DTC Code
DTC Detection Condition
Trouble Area
C1282
Stored during test mode.
Harness or connector
Transfer system
Skid control ECU (master cylinder sole ...
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 store ...
No Signal from Transmitter ID1 (C2121/21-C2124/24,C2181/81-C2184/84)
DESCRIPTION
The tire pressure warning valve and transmitters that are installed in the tire
and wheel assemblies measure the tire pressure of each wheel. The measured values
are transmitted to the tire pressure warning ECU and receiver in the vehicle as
radio waves. The ECU compares the measu ...
