| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000014VM0 |
| Model Year Start: 2018 | Model: Camry HV | Prod Date Range: [07/2017 - 09/2018] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1202; Master Reservoir Level Malfunction; 2018 MY Camry HV [07/2017 - 09/2018] | ||
|
DTC |
C1202 |
Master Reservoir Level Malfunction |
DESCRIPTION
If the skid control ECU (brake booster with master cylinder assembly) detects that the brake fluid level is low or there is an open in the brake fluid level warning switch signal circuit, DTC C1202 is stored.
|
DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|---|
|
C1202 |
Master Reservoir Level Malfunction |
1126 |
Either of the following is detected:
|
|
Electronically controlled brake system DTC HINT: The DTC is cleared when the conditions return to normal. |
DTC Detection Conditions: C1202 INF Code: 1126
|
Vehicle Condition |
|||
|---|---|---|---|
|
Pattern 1 |
Pattern 2 |
||
|
Diagnosis Condition |
- |
- |
- |
|
Malfunction Status |
The brake fluid level warning switch signal circuit is open for a certain period of time. |
○ |
- |
|
The reservoir level is low for a certain period of time. |
- |
○ |
|
|
Detection Time |
- |
- |
|
|
Number of Trips |
1 trip |
1 trip |
|
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".
Click here
![2018 MY Camry HV [07/2017 - 09/2018]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK DTC |
(a) Clear the DTCs.
Chassis > ABS/VSC/TRAC > Clear DTCs
(b) Turn the power switch off.
(c) Turn the power switch on (IG).
(d) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC C1202 is output. |
A |
|
DTC C120F is output with DTC C1202. |
B |
| B |
|
|
|
2. |
CHECK BRAKE FLUID LEVEL |
(a) Check that the brake fluid level is sufficient.
HINT:
If the fluid level is low, check for fluid leaks, and repair as necessary.
(1) Check for brake fluid leaks (connection between the brake booster pump assembly, brake master cylinder reservoir assembly (brake booster with master cylinder assembly), brake booster with master cylinder assembly, and wheel cylinders).
HINT:
If no leaks exist, add and adjust fluid using the Techstream.
Click here
(2) Check the thickness of the brake pad lining.
for Front Brake: Click here
for Rear Brake: Click here
HINT:
If the thickness is less than the standard, replace the brake pads with new ones.
(b) Check that there are no leaks from the connections between the brake booster pump assembly and brake booster with master cylinder assembly.
HINT:
As a visual check is very difficult, perform the check with the following procedure.
(1) Bleed the air from the brake system.
Click here
(2) Turn the power switch off.
(3) Disconnect the A39 brake pedal stroke sensor assembly connector.
(4) Select the Data List on the Techstream.
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
MT Voltage Value |
MT voltage value |
Min.: 0.00 V, Max.: 20.00 V |
Pump motor off: 0.00 V Pump motor on: 12.00 V |
- |
|
Accumulator Pressure |
Accumulator pressure output value |
Min.: 0.00 MPa, Max.: 24.48 MPa |
15.00 to 21.00 MPa (Pressure stable and pump motor stopped) |
When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator |
Chassis > ABS/VSC/TRAC > Data List
|
Tester Display |
|---|
|
MT Voltage Value |
|
Accumulator Pressure |
(5) Depress the brake pedal several times to operate the pump motor, then wait until it stops.
(6) After the pump motor stops, wait for 30 seconds, then check the drop in the accumulator pressure sensor output value and the state of the pump motor.
|
Result |
Proceed to |
|---|---|
|
The drop in the accumulator pressure sensor output value is less than 2.50 MPa 30 seconds after the pump motor stops, and the pump motor does not operate within 30 seconds after the pump motor stops. |
A |
|
The drop in the accumulator pressure sensor output value is 2.50 MPa or more 30 seconds after the pump motor stops, or the pump motor operates within 30 seconds after the pump motor stops. |
B |
| B |
|
CHECK AND REPAIR BRAKE FLUID LEAKS OR ADD FLUID |
|
|
3. |
INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (BRAKE FLUID LEVEL WARNING SWITCH) |
|
(a) Turn the power switch off. |
|
(b) Reconnect the A39 brake pedal stroke sensor assembly connector.
(c) Remove the brake master cylinder reservoir filler cap assembly.
(d) Make sure that there is no looseness at the locking part and the connecting part of the connector.
OK:
The connector is securely connected.
(e) Disconnect the A1 brake fluid level warning switch (brake booster with master cylinder assembly) connector.
(f) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(g) Measure the resistance according to the value(s) in the table below.
HINT:
A float is located inside the brake master cylinder reservoir assembly (brake booster with master cylinder assembly). Its position changes according to the level of brake fluid.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
2 (LBL) - 1 (GND) |
Brake fluid level warning switch (brake booster with master cylinder assembly) off (float up) |
1.84 to 2.16 kΩ |
|
2 (LBL) - 1 (GND) |
Brake fluid level warning switch (brake booster with master cylinder assembly) on (float down) |
Below 1 Ω (Brake fluid level is low) |
HINT:
If there are no problems after completing the preceding inspection, adjust the brake fluid to the MAX level with the power switch on (IG).
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE FLUID LEVEL WARNING SWITCH (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)) |
(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.
OK:
The connector is securely connected.
(b) Disconnect the A40 skid control ECU (brake booster with master cylinder assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A40-16 (LBL) - A1-2 (LBL) |
Always |
Below 1 Ω |
|
A40-16 (LBL) or A1-2 (LBL) - Body ground |
Always |
10 kΩ or higher |
|
A1-1 (GND) - Body ground |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
INSPECT BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY (SWITCH INPUT) |
|
(a) Reconnect the A40 skid control ECU (brake booster with master cylinder assembly) connector. |
|
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A1-2 (LBL) - Body ground |
Power switch on (IG) |
11 to 14 V |
| NG |
|
|
|
6. |
RECONFIRM DTC |
(a) Turn the power switch off.
(b) Reconnect the A1 brake fluid level warning switch (brake booster with master cylinder assembly) connector.
(c) Clear the DTCs.
Chassis > ABS/VSC/TRAC > Clear DTCs
(d) Turn the power switch off.
(e) Turn the power switch on (READY).
(f) Perform a road test.
(g) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC C1202 is not output. |
A |
|
DTC C1202 is output. |
B |
| A |
|
| B |
|
|
|