| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001PYS5 |
| Model Year Start: 2021 | Model: Avalon | Prod Date Range: [08/2020 - 08/2021] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for Gasoline Model): P057162; Brake Switch "A" Signal Compare Failure; 2021 MY Avalon [08/2020 - 08/2021] | ||
|
DTC |
P057162 |
Brake Switch "A" Signal Compare Failure |
DESCRIPTION
When the brake pedal is depressed, the stop light switch assembly sends a signal to the ECM. When the ECM receives this signal, it cancels the dynamic radar cruise control. The fail-safe function operates to enable normal driving even if there is a malfunction in the stop light signal circuit. The cancellation condition occurs when voltage is applied to the terminal STP. When the brake is applied, voltage is normally applied to the terminal STP of the ECM through the STOP fuse and the stop light switch assembly, and the ECM turns the dynamic radar cruise control system off.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
|---|---|---|---|---|
|
P057162 |
Brake Switch "A" Signal Compare Failure |
While the engine switch is on (IG) and the dynamic radar cruise control system is operating, voltage of the STP terminal and that of the ST1- terminal of the ECM are less than 1 V for approximately 0.5 seconds or more. |
|
Does not come on |
WIRING DIAGRAM
for 2GR-FKS
for A25A-FKS
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
Before replacing the ECM, refer to Registration.
Click here
![2021 - 2022 MY Avalon [08/2020 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY AND BODY GROUND) |
|
(a) Disconnect the A33 stop light switch assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-2 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A33-7 (B) - Body ground |
Always |
11 to 14 V |
|
A33-6 (B) - Body ground |
Engine switch on (IG) |
11 to 14 V |
|
A33-6 (B) - Body ground |
Engine switch off |
Below 1 V |
(d) Connect the A33 stop light switch assembly connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
(a) Inspect the stop light switch assembly.
Click here
| NG |
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (ECM - STOP LIGHT SWITCH ASSEMBLY) |
(a) Disconnect the A18*1 or A64*2 ECM connector.
- *1: for 2GR-FKS
- *2: for A25A-FKS
(b) Disconnect the A33 stop light switch assembly connector.
(c) Disconnect the A28 skid control ECU (brake actuator assembly) connector.
(d) Disconnect the K10 certification ECU (smart key ECU assembly) connector.
(e) Disconnect the G21 shift lock control ECU (shift lock control unit assembly) connector.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 2GR-FKS:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A18-42 (ST1-) - A33-5 (L) |
Always |
Below 1 Ω |
|
A18-27 (STP) - A33-3 (L) |
Always |
Below 1 Ω |
|
A18-42 (ST1-) or A33-5 (L) - Body ground |
Always |
10 kΩ or higher |
|
A18-27 (STP) or A33-3 (L) - Body ground |
Always |
10 kΩ or higher |
for A25A-FKS:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A64-22 (ST1-) - A33-5 (L) |
Always |
Below 1 Ω |
|
A64-21 (STP) - A33-3 (L) |
Always |
Below 1 Ω |
|
A64-22 (ST1-) or A33-5 (L) - Body ground |
Always |
10 kΩ or higher |
|
A64-21 (STP) or A33-3 (L) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM for 2GR-FKS: Click here
for A25A-FKS: Click here
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|