Vehicle Stability Control System Downhill Assist Control Indicator Light Remains On
Brake. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
CHECK SKID CONTROL ECU CONNECTOR
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)
INSPECT DOWNHILL ASSIST CONTROL SWITCH
CHECK HARNESS AND CONNECTOR (DOWNHILL ASSIST CONTROL SW - SKID CONTROL ECU/BODY GROUND)
INSPECT COMBINATION METER ASSEMBLY
VEHICLE STABILITY CONTROL SYSTEM - Downhill Assist Control Indicator Light Remains ON |
DESCRIPTION
When the downhill assist control switch is pushed on, the downhill assist control function is available and the downhill assist control indicator light illuminates.- HINT:
- Even if the downhill assist control switch is pressed, the downhill assist control indicator light will blink and downhill assist control will not be activated under the following conditions:
- Gear position is not L or R.
- The system is malfunctioning.
- The vehicle speed is 25 km/h (15 mph) or more.
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- When replacing the brake actuator assembly, perform zero point calibration (RAV4_ACA30 RM000001K1O00SX.html).
| 1.CHECK CAN COMMUNICATION SYSTEM |
Check if a CAN communication system DTC is output (RAV4_ACA30 RM000001W16007X.html).
- Result:
Result
| Proceed to
|
DTC is not output.
| A
|
DTC is output.
| B
|
| 2.CHECK SKID CONTROL ECU CONNECTOR |
Check if the skid control ECU connector is securely connected.
- OK:
- The connector is securely connected.
| | CONNECT CONNECTOR CORRECTLY |
|
|
| 3.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND) |
Disconnect the skid control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
A67-29 (HDCS) - Body ground
| Downhill assist control switch is pushed
| Below 1 Ω
|
Downhill assist control switch is not pushed
| 10 kΩ or higher
|
| 4.INSPECT DOWNHILL ASSIST CONTROL SWITCH |
Remove the downhill assist control switch (RAV4_ACA30 RM000002101009X.html).
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Switch Condition
| Specified Condition
|
1 - 4
| Switch is pushed
| Below 1 Ω
|
Switch is not pushed
| 10 kΩ or higher
|
| | REPLACE DOWNHILL ASSIST CONTROL SWITCH |
|
|
| 5.CHECK HARNESS AND CONNECTOR (DOWNHILL ASSIST CONTROL SW - SKID CONTROL ECU/BODY GROUND) |
Disconnect the skid control ECU connector.
Disconnect the downhill assist control switch connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection
| Condition
| Specified Condition
|
A67-29 (HDCS) - E36-4
| Always
| Below 1 Ω
|
A67-29 (HDCS) - Body ground
| Always
| 10 kΩ or higher
|
E36-1 - Body ground
| Always
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| 6.INSPECT COMBINATION METER ASSEMBLY |
Inspect the combination meter (RAV4_ACA30 RM0000020M0001X.html).
