| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001EXKO |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - ] |
| Title: PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM (w/ Vacuum Brake Booster): Electric Parking Brake does not Operate; 2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ] | ||
|
Electric Parking Brake does not Operate |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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![2019 - 2024 MY RAV4 RAV4 HV [11/2018 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ Vacuum Brake Booster): UTILITY](/t3Portal/stylegraphics/info.gif)
- When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch (integration control and panel assembly) as the parking brake indicator light blinks when the ignition switch is first turned to ON.
HINT:
Even if the electric parking brake is operating normally, the parking brake indicator light on the combination meter may be malfunctioning.
PROCEDURE
|
1. |
CHECK CAN COMMUNICATION SYSTEM |
(a) Check if CAN communication system DTCs are output.
Chassis > Brake/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
2. |
VEHICLE OPERATION CHECK |
(a) With the wheels not contacting the ground, check the condition of the rear wheels when the electric parking brake is operating and not operating.
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|
Result |
Proceed to |
|---|---|
|
Lock and release operation is normal and parking brake indicator light turns off or blinks |
A |
|
Lock and release operation is malfunctioning and parking brake indicator light illuminates or turns off according to switch operation |
B |
|
Lock and release operation is malfunctioning and parking brake indicator light turns off or blinks |
C |
| B |
|
INSPECT REAR BRAKE |
| C |
|
|
|
3. |
INSPECT COMBINATION METER ASSEMBLY |
(a) Perform the Active Test of the combination meter assembly using the Techstream.
Body Electrical > Combination Meter > Active Test
|
Tester Display |
|---|
|
Park Warning |
(b) Check the combination meter assembly.
OK:
Parking brake indicator light turns on or off in accordance with the Techstream operation.
| OK |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| NG |
|
|
4. |
CHECK HARNESS AND CONNECTOR (+BS TERMINAL VOLTAGE) |
(a) Turn the ignition switch off.
|
(b) Disconnect the A39 skid control ECU (brake actuator assembly) connector. |
|
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A39-30 (+BS) - Body ground |
Ignition switch off |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (IG1 TERMINAL VOLTAGE) |
(a) Turn the ignition switch off.
|
(b) Disconnect the A39 skid control ECU (brake actuator assembly) connector. |
|
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
w/ Stop and Start System:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A39-36 (IG1) - Body ground |
Ignition switch ON |
10.5 to 16 V |
w/o Stop and Start System:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A39-36 (IG1) - Body ground |
Ignition switch ON |
11 to 14 V |
| OK |
|
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)
|
| NG (w/o Stop and Start System) |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY - ENGINE STOP AND START ECU) |
(a) Turn the ignition switch off.
(b) Disconnect the A39 skid control ECU (brake actuator assembly) connector.
(c) Disconnect the A32 engine stop and start ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A39-36 (IG1) - A32-1 (IG31) |
Always |
Below 1 Ω |
|
A39-36 (IG1) or A32-1 (IG31) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
GO TO STOP AND START SYSTEM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|