| Last Modified: 01-30-2024 | 6.11:8.1.0 | Doc ID: RM100000001HG8I |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [02/2019 - 12/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C1214; Hydraulic Control System Malfunction; 2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021] | ||
|
DTC |
C1214 |
Hydraulic Control System Malfunction |
DESCRIPTION
The skid control ECU (brake booster with master cylinder assembly) controls braking force according to the hybrid control system regenerative braking force and provides the hydraulic pressure necessary for operating each wheel cylinder according to the wheel cylinder pressure sensor.
DTCs may be stored if one of the following occurs:
- Brake fluid leaks.
- Wheel cylinder vibrates due to uneven wear of a brake disc.
- Foreign matter enters a solenoid valve.
- Line pressure drops during air bleeding.
- Brake pads are replaced.
-
Rotors are replaced.
HINT:
When replacing the brake pads, retracting the brake caliper pistons and installing new brake pads will greatly increase the clearance between the brake pads and brake discs. This will result in a significant possibility of this DTC being stored the next time the brake pedal is depressed. As this is not a malfunction, clear the DTC if it is stored for this reason.
|
DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|---|
|
C1214 |
Hydraulic Control System Malfunction |
431 432 433 434 435 436 437 438 |
|
|
- |
CAUTION / NOTICE / HINT
NOTICE:
When replacing the brake actuator (brake booster with master cylinder assembly), perform initialization and calibration of the linear solenoid valve.
Click here
![2019 - 2021 MY RAV4 RAV4 HV [02/2019 - 12/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY](/t3Portal/stylegraphics/info.gif)
HINT:
When C1364 is output together with C1214, inspect and repair the trouble areas indicated by C1364 first.
Click here
PROCEDURE
|
1. |
CHECK FOR FLUID LEAK |
(a) Check that there are no fluid leaks in the brake lines between the brake actuator (brake booster with master cylinder assembly) and the wheel cylinders.
(b) Check that the brakes are not dragging.
OK:
There are no fluid leaks or dragging.
| NG |
|
REPAIR OR REPLACE APPLICABLE PART |
|
|
2. |
CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (ACTUATOR SIDE) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
(b) Disconnect the A42 skid control ECU (brake booster with master cylinder assembly) connector 2 minutes after the ignition switch is turned off.
(c) Check both the connector body and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
| NG |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
|
|
|
3. |
PERFORM AIR BLEEDING |
(a) Reconnect the A42 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Clear the DTCs.
Click here
Chassis > ABS/VSC/TRAC > Clear DTCs
(c) Perform the air bleeding procedure in Bleed Brake System.
Click here
|
|
4. |
CHECK HARNESS AND CONNECTOR (VEHICLE SIDE) |
(a) Disconnect the A42 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Measure the voltage and resistance on the wire harness side.
Click here
OK:
Voltage and resistance readings are all normal.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
READ VALUE USING TECHSTREAM (WHEEL CYLINDER PRESSURE SENSOR) |
(a) Reconnect the A42 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Connect an LSPV gauge set.
(c) Connect the Techstream to the DLC3.
(d) Turn the ignition switch to ON.
(e) Select the Data List on the Techstream.
Click here
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Wheel Cylinder Pressure Sensor |
Wheel cylinder pressure sensor |
Min.: 0.00 V, Max.: 5.00 V |
Brake pedal released: 0.10 to 0.90 V |
Reading increases when brake pedal is depressed |
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
|---|
|
Wheel Cylinder Pressure Sensor |
(f) Check the output values of the wheel cylinder pressure sensor at each hydraulic pressure level during electronically controlled brake system control.
Standard Voltage:
for Front Wheel Cylinder LH
|
Hydraulic Pressure (MPa (kgf/cm2, psi)) |
Wheel Cylinder Pressure Sensor (V) |
|---|---|
|
2.0 (20.4, 290) |
0.53 to 1.33 |
|
5.0 (51.0, 725) |
1.12 to 1.92 |
|
7.0 (71.4, 1015) |
1.52 to 2.32 |
|
10.0 (102.0, 1451) |
2.14 to 2.94 |
for Front Wheel Cylinder RH
|
Hydraulic Pressure (MPa (kgf/cm2, psi)) |
Wheel Cylinder Pressure Sensor (V) |
|---|---|
|
2.0 (20.4, 290) |
0.53 to 1.33 |
|
5.0 (51.0, 725) |
1.12 to 1.92 |
|
7.0 (71.4, 1015) |
1.52 to 2.32 |
|
10.0 (102.0, 1451) |
2.14 to 2.94 |
| NG |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
|
|
|
6. |
CHECK BRAKE DISC |
(a) Turn the ignition switch off.
(b) Disconnect the A41 brake pedal stroke sensor assembly connector.
(c) Perform a road test according to Freeze Frame Data or customer problem analysis. While driving, check for abnormal brake pedal vibration caused by brake discs that are worn or have excess runout.
OK:
Brake pedal does not vibrate during braking.
HINT:
- An unevenly worn disc may vibrate the caliper piston and cause fluctuations in brake line pressure, triggering a malfunction detection condition.
- The brake pedal does not kick back due to caliper piston vibration during electronically controlled brake system control.
- If the brake pedal stroke sensor assembly connector is disconnected, the fail-safe function will prohibit electronically controlled brake system control.
- The Active Test does not prohibit electronically controlled brake system control when the vehicle is being driven, so disconnect the brake pedal stroke sensor assembly connector before continuing with inspection.
-
Uneven disc wear can be checked by measuring the disc thickness variation.
for Front Brake: Click here
for Rear Brake: Click here
| NG |
|
REPLACE BRAKE DISC |
|
|
7. |
RECONFIRM DTC |
(a) Reconnect the A41 brake pedal stroke sensor assembly connector.
(b) Clear the DTCs.
Click here
Chassis > ABS/VSC/TRAC > Clear DTCs
(c) Perform a road test under the same malfunction conditions recreated based on the Freeze Frame Data or customer problem analysis.
(d) Check if the same DTC is output.
Click here
Chassis > ABS/VSC/TRAC > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC C1214 is not output. |
A |
|
DTC C1214 is output. |
B |
HINT:
If the DTC is no longer output, it can be suspected that it was output due to an improperly connected connector.
| A |
|
| B |
|
REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY
|
|
|