| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AZ8B |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - 08/2021] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C1225-C1228,C1468,C1469,C146A,C146B; SA1 Solenoid Circuit; 2019 - 2021 MY Avalon [04/2018 - 08/2021] | ||
|
DTC |
C1225 |
SA1 Solenoid Circuit |
|
DTC |
C1226 |
SA2 Solenoid Circuit |
|
DTC |
C1227 |
SA3 Solenoid Circuit |
|
DTC |
C1228 |
STR Solenoid Circuit |
|
DTC |
C1468 |
SFR Solenoid Circuit |
|
DTC |
C1469 |
SFL Solenoid Circuit |
|
DTC |
C146A |
SRR Solenoid Circuit |
|
DTC |
C146B |
SRL Solenoid Circuit |
DESCRIPTION
These solenoids turn on when signals are received from the skid control ECU (brake actuator assembly) and they control the pressure acting on the wheel cylinders to control the braking force.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
C1225 |
SA1 Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C1226 |
SA2 Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C1227 |
SA3 Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C1228 |
STR Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C1468 |
SFR Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C1469 |
SFL Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C146A |
SRR Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
|
C146B |
SRL Solenoid Circuit |
Solenoid valve signal does not match the check result. |
|
WIRING DIAGRAM
Refer to DTC C146E.
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![2019 - 2021 MY Avalon [04/2018 - 08/2021]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model): C146E; Open Circuit in ABS Solenoid Relay Circuit](/t3Portal/stylegraphics/info.gif)
CAUTION / NOTICE / HINT
NOTICE:
When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.
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PROCEDURE
|
1. |
RECONFIRM DTC |
HINT:
These codes are detected when a problem is determined in the skid control ECU (brake actuator assembly).
The solenoid circuits are in the skid control ECU (brake actuator assembly).
Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if any DTCs are output before replacing the skid control ECU (brake actuator assembly).
(a) Clear the DTCs.
Chassis > ABS/VSC/TRAC/EPB > Clear DTCs
(b) Turn the engine switch off.
(c) Start the engine.
(d) Drive the vehicle at a speed of 20 km/h (12 mph) or more.
(e) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC/EPB > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Both C1225, C1226, C1227, C1228, C1468, C1469, C146A and C146B are not output |
A |
|
C1225, C1226, C1227, C1228, C1468, C1469, C146A or C146B is output |
B |
HINT:
- The skid control ECU (brake actuator assembly) performs self diagnosis of the solenoid circuit after the engine switch is turned on (IG).
- If the normal system code is output (no DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).
- If any DTCs are output while jiggling a connector or wire harness of the 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
|
|
|