| Last Modified: 05-08-2025 | 6.11:8.1.0 | Doc ID: RM10000000214QV |
| Model Year Start: 2022 | Model: RAV4 | Prod Date Range: [12/2021 - ] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): C143A7E,C143A7F; ABS Solenoid Control Actuator Stuck On; 2022 - 2025 MY RAV4 RAV4 HV [12/2021 - ] | ||
|
DTC |
C143A7E |
ABS Solenoid Control Actuator Stuck On |
|
DTC |
C143A7F |
ABS Solenoid Control Actuator Stuck Off |
DESCRIPTION
The ABS solenoid relay is built into the No. 2 skid control ECU in the brake actuator assembly.
The ABS solenoid relay supplies power to the holding solenoid and reduction solenoid.
The solenoid relay is turned on 1.5 seconds after the ignition switch is turned to ON, and is turned off if an open or short in the solenoid is detected by self-diagnosis performed when the vehicle is starting off.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
C143A7E |
ABS Solenoid Control Actuator Stuck On |
When voltage at terminal +BS is 9.5 V or higher, solenoid relay is OFF, relay contact is ON continuously for 4.5 seconds or more. |
No. 2 skid control ECU (brake actuator assembly) |
Comes on |
|
|
C143A7F |
ABS Solenoid Control Actuator Stuck Off |
When voltage at terminal +BS is 9.5 V or higher and solenoid relay is ON, relay contact is OFF continuously for 0.22 seconds or more. |
|
Comes on |
|
MONITOR DESCRIPTION
The No. 2 skid control ECU (brake actuator assembly) monitors the voltage of the ABS solenoid.
When the ABS solenoid relay is instructed to be on and the voltage of the ABS solenoid is within the range of an open circuit malfunction, or when the ABS solenoid relay is instructed to be off and the voltage of the ABS solenoid is within the range of a short circuit malfunction, an open circuit or short circuit is judged respectively and the MIL is illuminated and a DTC is stored.
MONITOR STRATEGY
|
Related DTCs |
C143B: Brake system voltage solenoid relay stuck C143C: Brake system voltage open circuit |
|
Required Sensors/Components(Main) |
No. 2 skid control ECU (brake actuator assembly) |
|
Required Sensors/Components(Related) |
No. 2 skid control ECU (brake actuator assembly) |
|
Frequency of Operation |
Continuous |
|
Duration |
4.5 seconds: C143B (Case 1 and 2) 0.22 seconds: C143C (Case 1) 0.204 seconds: C143C (Case 2) |
|
MIL Operation |
Immediately |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
C143B (Case 1)
|
Monitor runs whenever the following DTCs are not stored |
C137C: Brake system voltage input out of range low |
|
All of the following conditions are met |
- |
|
+BS voltage |
9.5 V or more |
|
Command to solenoid relay |
Off |
C143B (Case 2)
|
Monitor runs whenever the following DTCs are not stored |
C137C: Brake system voltage input out of range low |
|
Both of the following conditions are met |
- |
|
ECU state |
Pre main |
|
Command to solenoid relay |
Off |
C143C (Case 1)
|
Monitor runs whenever the following DTCs are not stored |
C0597: ABS hold solenoid circuit stuck C12A7: ABS hold solenoid (FL) circuit low C12A8: ABS hold solenoid (FL) circuit high C12B2: ABS release solenoid (FL) circuit low C12B3: ABS release solenoid (FL) circuit high C12BD: ABS hold solenoid (FR) circuit low C12BE: ABS hold solenoid (FR) circuit high C12C8: ABS release solenoid (FR) circuit low C12C9: ABS release solenoid (FR) circuit high C12D3: ABS hold solenoid (RL) circuit low C12D4: ABS hold solenoid (RL) circuit high C12DE: ABS release solenoid (RL) circuit low C12DF: ABS release solenoid (RL) circuit high C12E9: ABS hold solenoid (RR) circuit low C12EA: ABS hold solenoid (RR) circuit high C12F4: ABS release solenoid (RR) circuit low C12F5: ABS release solenoid (RR) circuit high C12F6: ABS hold solenoid other functional C12F7: ABS hold solenoid other functional C137C: Brake system voltage input out of range low C137D: Brake system voltage input out of range high C13BF: SM solenoid other functional C13C2: SM1 solenoid circuit low C13C3: SM1 solenoid circuit high C13CB: SM2 solenoid circuit low C13CC: SM2 solenoid circuit high C143B: Brake system voltage solenoid relay stuck |
|
Both of the following conditions are met |
- |
|
Command to solenoid relay |
On |
|
+BS voltage |
9.5 V or more |
C143C (Case 2)
|
Monitor runs whenever the following DTCs are not stored |
C0597: ABS hold solenoid circuit stuck C12A7: ABS hold solenoid (FL) circuit low C12A8: ABS hold solenoid (FL) circuit high C12B2: ABS release solenoid (FL) circuit low C12B3: ABS release solenoid (FL) circuit high C12BD: ABS hold solenoid (FR) circuit low C12BE: ABS hold solenoid (FR) circuit high C12C8: ABS release solenoid (FR) circuit low C12C9: ABS release solenoid (FR) circuit high C12D3: ABS hold solenoid (RL) circuit low C12D4: ABS hold solenoid (RL) circuit high C12DE: ABS release solenoid (RL) circuit low C12DF: ABS release solenoid (RL) circuit high C12E9: ABS hold solenoid (RR) circuit low C12EA: ABS hold solenoid (RR) circuit high C12F4: ABS release solenoid (RR) circuit low C12F5: ABS release solenoid (RR) circuit high C12F6: ABS hold solenoid other functional C12F7: ABS hold solenoid other functional C137C: Brake system voltage input out of range low C137D: Brake system voltage input out of range high C13BF: SM solenoid other functional C13C2: SM1 solenoid circuit low C13C3: SM1 solenoid circuit high C13CB: SM2 solenoid circuit low C13CC: SM2 solenoid circuit high C143B: Brake system voltage solenoid relay stuck |
|
Both of the following conditions are met |
- |
|
ECU state |
Pre main |
|
Command to solenoid relay |
On |
TYPICAL MALFUNCTION THRESHOLDS
C143B (Case 1 and 2)
|
Power supply for solenoid |
6 V or more |
C143C (Case 1 and 2)
|
Power supply for solenoid |
Less than 6 V |
COMPONENT OPERATING RANGE
C143B (Case 1)
|
All of the following conditions are met |
- |
|
+BS voltage |
Higher than 9.5 V, and 17.4 V or less |
|
Command to solenoid relay |
Off |
|
Power supply for solenoid |
Less than 6 V |
C143B (Case 2) and C143C (Case 2)
|
All of the following conditions are met |
- |
|
ECU state |
Pre main |
|
ABS pump motor fail (C052B, C052D, C052E, C055B) |
Not detected |
|
Brake system voltage fail (C143B, C143C) |
Not detected |
|
ABS hold solenoid fail (C0597) |
Not detected |
|
Wheel speed sensor fail (C14E1, C14E4, C14E7, C14EA) |
Not detected |
C143C (Case 1)
|
Both of the following conditions are met |
- |
|
Command to solenoid relay |
On |
|
Power supply for solenoid |
6 V or more |
CONFIRMATION DRIVING PATTERN
NOTICE:
When performing the normal judgment procedure, make sure that the driver door is closed and is not opened at any time during the procedure.
HINT:
- After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
- When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
- Connect the GTS to the DLC3.
- Turn the ignition switch to ON and turn the GTS on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off.
- Turn the ignition switch to ON (READY) and turn the GTS on.
- Drive the vehicle at a speed of 20 km/h (12 mph) for 1 minute. [*1]
-
Operate the ABS using a drum tester or equivalent. [*2]
HINT:
[*1] to [*2]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Enter the following menus: Chassis / Brake/EPB / Utility / All Readiness.
-
Check the DTC judgment result.
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE, perform driving pattern again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
After replacing the No. 2 skid control ECU (brake actuator assembly), perform "Calibration" after performing "Reset Memory".
Click here
![2022 - 2025 MY RAV4 RAV4 HV [12/2021 - ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster): UTILITY](/t3Portal/stylegraphics/info.gif)
HINT:
When C137BA2 and/or C137BA3 is output together with C143A7E and/or C143A7F, inspect and repair the trouble areas indicated by C137BA2 and/or C137BA3 first.
for C137BA2: Click here
for C137BA3: Click here
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (+BS TERMINAL) |
|
(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors. OK: The connector is securely connected. |
|
(b) Disconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.
(c) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A105-14 (+BS) - Body ground |
Always |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (GND1 TERMINAL) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A105-1 (GND1) - Body ground |
1 minute or more after disconnecting the cable from the negative (-) auxiliary battery terminal |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CLEAR DTC |
(a) Reconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.
(b) Clear the DTCs.
Chassis > Brake/EPB > Clear DTCs
(c) Turn the ignition switch off.
|
|
4. |
RECONFIRM DTC |
(a) Based on the Freeze Frame Data and interview with the customer, attempt to reproduce the conditions when the malfunction occurred.
(b) Check if the same DTC is output.
Chassis > Brake/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTCs C143A7E and C143A7F are not output. |
A |
|
DTCs C143A7E and/or C143A7F are output. |
B |
HINT:
- If a speed signal of 20 km/h (12 mph) or more is input to the No. 2 skid control ECU (brake actuator assembly) with the ignition switch turned to ON and the stop light switch assembly off, the ECU performs self-diagnosis of the solenoid circuit.
- If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harnesses, and fuses of the No. 2 skid control ECU (brake actuator assembly).
- If any DTCs are output while jiggling a connector or wire harness of the No. 2 skid control ECU (brake actuator assembly), inspect and repair the connector or wire harness.
- If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.
| A |
|
| B |
|
REPLACE BRAKE ACTUATOR ASSEMBLY
|
|
|