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:
System Description
SYSTEM DESCRIPTION
1. UNLOCK OPERATION CONDITIONS FOR STEERING LOCK
(a) When the following condition is met, the unlock operation is performed.
The engine switch is on (ACC) or on (IG).
HINT:
When the engine switch is turned on (ACC) or on (IG) and the key and
certification ECU ( ...
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT DRIVE BELT
(a) Visually check the belt for defects, such as excessive wear and frayed cords.
If any defects are found, replace the drive belt.
HINT:
Replace the belt if there are any missing ribs.
2. BLEED POWER STEERING SYSTEM
(a) Check the fluid ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE FRONT OIL PUMP BODY O-RING
(a) Remove the front oil pump body O-ring from the oil pump assembly.
2. SECURE OIL PUMP ASSEMBLY
(a) Place the oil pump assembly on the torque converter assembly.
...
