- Brake pedal load sensing switch
- Brake pedal load sensing switch circuit
- Brake actuator assembly (Skid control ECU)
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VIWD |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - 11/2017] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1429; Open or Short in Brake Pedal Load Sensing Switch; 2016 - 2017 MY Sienna [12/2015 - 11/2017] | ||
|
DTC |
C1429 |
Open or Short in Brake Pedal Load Sensing Switch |
DESCRIPTION
The brake pedal load sensing switch is turned on when the brake pedal is depressed with force exceeding a predetermined level.
The skid control ECU detects if the brake pedal is depressed or not via this circuit.
|
DTC Code |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
C1429 |
An open or short in the brake pedal load sensing switch continues for 0.3 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information (See page
![2016 - 2017 MY Sienna [12/2015 - 11/2017]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: CALIBRATION](/t3Portal/stylegraphics/info.gif)
).
HINT:
When DTC C1425 and/or C1426 is output together with DTC C1429, inspect and repair the trouble areas indicated by DTC C1425 and/or C1426 first (See page
, or
).
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (BRAKE PEDAL LOAD SENSING SWITCH) |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / ABS/VSC/ TRAC / Data List.
(e) Select the Data List on the Techstream (See page
).
ABS/VSC/TRAC
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Brake Pedal Load Sensing SW |
Brake pedal load sensing switch / ON or OFF |
ON: Brake pedal depressed beyond the specified point OFF: Brake pedal not depressed beyond the specified point |
- |
(f) Check that the brake pedal load sensing switch display observed on the Techstream changes according to brake pedal operation.
OK:
The Techstream displays ON or OFF according to brake pedal operation.
| NG |
|
|
|
2. |
RECONFIRM DTC |
(a) Turn the ignition switch off.
(b) Clear the DTCs (See page
).
(c) Start the engine.
(d) Perform the road test.
(e) Check if the same DTC is recorded (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTC (C1429) is not output |
A |
|
DTC (C1429) is output |
B |
| A |
|
CHECK FOR INTERMITTENT PROBLEMS (See page
|
| B |
|
|
3. |
INSPECT BRAKE PEDAL LOAD SENSING SWITCH |
Text in Illustration
|
*a |
Component without harness connected (Brake Pedal Load Sensing Switch) |
|
*b |
Brake Pedal Released (ON) |
|
*c |
Brake Pedal Depressed (OFF) |
NOTICE:
- Do not remove the brake pedal load sensing switch from the brake pedal sub-assembly.
- When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal sub-assembly.
(a) Turn the ignition switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(c) Disconnect the brake pedal load sensing switch connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
2 (FSW+) - 1 (GND) |
Brake pedal load sensing switch OFF (Brake pedal depressed) |
950 to 1050 Ω |
|
2 (FSW+) - 1 (GND) |
Brake pedal load sensing switch ON (Brake pedal released) |
203 to 223 Ω |
| NG |
|
REPLACE BRAKE PEDAL SUB-ASSEMBLY (BRAKE PEDAL LOAD SENSING SWITCH) |
|
|
4. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL LOAD SENSING SWITCH) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(b) Disconnect the skid control ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A4-27 (FSW+) - A7-2 (FSW+) |
Always |
Below 1 Ω |
|
A4-27 (FSW+) - Body ground |
Always |
10 kΩ or higher |
|
A7-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|