| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001HBJ9 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): C052C11,...,C142719; ABS Pump Motor Control Circuit Short to Ground; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] | ||
|
DTC |
C052C11 |
ABS Pump Motor Control Circuit Short to Ground |
|
DTC |
C052C13 |
ABS Pump Motor Control Circuit Open |
|
DTC |
C052F14 |
ABS Pump Motor Supply Voltage Circuit Short to Ground or Open |
|
DTC |
C142719 |
ABS Pump Motor Circuit Current Above Threshold |
DESCRIPTION
The ABS motor relay is built into the brake actuator assembly.
When the skid control ECU (brake actuator assembly) operates ABS, TRAC, VSC or brake assist, the ABS motor relay turns ON and drives the motor pump built into the brake actuator assembly.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C052C11 |
ABS Pump Motor Control Circuit Short to Ground |
When the voltage at terminal +BM is between 9.6 and 16.4 V, a short to ground in the ABS motor drive circuit is detected during the self test. |
Skid control ECU (brake actuator assembly) |
|
C052C13 |
ABS Pump Motor Control Circuit Open |
An open in the ABS motor drive circuit is detected during the self test. |
Skid control ECU (brake actuator assembly) |
|
C052F14 |
ABS Pump Motor Supply Voltage Circuit Short to Ground or Open |
|
Skid control ECU (brake actuator assembly) |
|
C142719 |
ABS Pump Motor Circuit Current Above Threshold |
|
Skid control ECU (brake actuator assembly) |
DTC Detection Conditions: C052F14
|
Vehicle Condition |
|||
|---|---|---|---|
|
Pattern 1 |
Pattern 2 |
||
|
Diagnosis Condition |
The pump motor is turned off after operating. |
○ |
- |
|
Malfunction Status |
0.6 V or more is detected at the pump motor. |
○ |
- |
|
The power supply of the ABS motor relay is less than 5 V. |
- |
○ |
|
|
Detection Time |
0.48 seconds or more. |
0.15 seconds or more. |
|
|
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.
DTC Detection Conditions: C142719
|
Vehicle Condition |
|||
|---|---|---|---|
|
Pattern 1 |
Pattern 2 |
||
|
Diagnosis Condition |
The ABS motor relay is operating. |
○ |
○ |
|
Malfunction Status |
An overload in the ABS motor relay is detected. |
○ |
- |
|
A short in the pump motor drive circuit is detected. |
- |
○ |
|
|
Detection Time |
0.06 seconds or more. |
0.06 seconds or more. |
|
|
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.
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.
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![2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): UTILITY](/t3Portal/stylegraphics/info.gif)
-
Before performing troubleshooting, make sure to confirm that the battery voltage is normal.
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- The system may store DTC C052F14 due to a drop in battery voltage. If a DTC regarding low system supply power voltage is output at the same time, perform troubleshooting for that DTC first.
- If the vehicle has stored DTC C052F14 due a drop in battery voltage, it can be cleared by driving the vehicle at a speed of 15 km/h (9 mph) or more for 0.48 seconds or more and then clearing the DTCs using the GTS.
PROCEDURE
|
1. |
REPLACE BRAKE ACTUATOR ASSEMBLY |
(a) Replace the skid control ECU (brake actuator assembly).
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| NEXT |
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END |
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