Toyota Tacoma (2015-2018) Service Manual: Parking Brake Switch Circuit
DESCRIPTION
This circuit is from the parking brake switch assembly to the navigation receiver assembly.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK VEHICLE SIGNAL (OPERATION CHECK) |
|
(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 (NAVIGATION RECEIVER ASSEMBLY - PARKING BRAKE SWITCH ASSEMBLY) |
(a) Disconnect the N25 navigation 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 |
|---|---|---|
|
N25-15 (PKB) - P6-1 |
Always |
Below 1 Ω |
|
N25-15 (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.
- for Hydraulic Brake Booster: See page
.gif)
- for Vacuum Brake Booster: See page
| 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 navigation receiver assembly and steering pad switch
assembly illumination when the light control switch is in the TAIL or HEAD position.
WIRING DIAGRAM
CAU ...
Speaker Circuit
DESCRIPTION
If there is a short in a speaker circuit, the stereo component amplifier assembly*1
or navigation receiver assembly*2 detects it and stops output to the speakers.
Thus sound cannot be ...
Other materials:
Open in One Side of Bus 2 Branch Line
DESCRIPTION
When the CAN bus main lines are normal (no open, short to ground, short to +B
or short between lines) and there is an ECU or sensor on the "Communication Bus
Check" screen that is indicated as not communicating or whose connection status
on the "Communication Bus Ch ...
Front Passenger Side Door ECU Communication Stop (B2322)
DESCRIPTION
This DTC is stored when LIN communication between the front power window regulator
motor assembly RH and main body ECU (multiplex network body ECU) stops for 10 seconds
or more.
DTC No.
DTC Detection Condition
Trouble Area
B2322
...
Internal Control Module EEPROM Data Memory Failure (P062F44)
DESCRIPTION
The ECM monitors its internal operation and it will set this DTC when it detects
an internal malfunction.
DTC No.
DTC Detection Condition
Trouble Area
SAE
P062F44
ECM internal error (EEPROM)
ECM
...
