| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GZ6P |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for HV Model): P057162; Brake Switch "A" Signal Compare Failure; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] | ||
|
DTC |
P057162 |
Brake Switch "A" Signal Compare Failure |
DESCRIPTION
When the brake pedal is depressed, the stop light switch assembly outputs a signal to the hybrid vehicle control ECU. The hybrid vehicle control ECU uses this signal to control cancellation of vehicle speed by the dynamic radar cruise control. When the hybrid vehicle control ECU determines that terminals STP and ST1 of the stop light switch assembly are both less than 1 V, DTC P057162 is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
P057162 |
Brake Switch "A" Signal Compare Failure |
When the power switch is on (IG) and the dynamic radar cruise control system is operating, the hybrid vehicle control ECU detects that the voltage at terminal STP and ST1- are both less than 1 V for approximately 0.5 seconds or more. |
|
Cruise Control |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
Before replacing the hybrid vehicle control ECU, refer to Registration.
Click here
![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) |
|
(a) Disconnect the A53 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 |
|---|---|---|
|
A53-2 (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 |
|---|---|---|
|
A53-7 (B) - Body ground |
Always |
11 to 14 V |
|
A53-6 (B) - Body ground |
Power switch on (IG) |
11 to 14 V |
|
A53-6 (B) - Body ground |
Power switch off |
Below 1 V |
(d) Connect the A53 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 (STOP LIGHT SWITCH ASSEMBLY - HYBRID VEHICLE CONTROL ECU) |
(a) Disconnect the A57 and I2 hybrid vehicle control ECU connectors.
(b) Disconnect the A53 stop light switch assembly connector.
(c) Disconnect the A48 skid control ECU (brake booster with master cylinder assembly) connector.
(d) Disconnect the O61 certification ECU (smart key ECU assembly) connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-5 (L) - I2-28 (ST1-) |
Always |
Below 1 Ω |
|
A53-3 (L) - A57-7 (STP) |
Always |
Below 1 Ω |
|
A53-5 (L) or I2-28 (ST1-) - Body ground |
Always |
10 kΩ or higher |
|
A53-3 (L) or A57-7 (STP) - Body ground |
Always |
10 kΩ or higher |
(f) Connect the O61 certification ECU (smart key ECU assembly) connector.
(g) Connect the A48 skid control ECU (brake booster with master cylinder assembly) connector.
(h) Connect the A53 stop light switch assembly connector.
(i) Connect the A57 and I2 hybrid vehicle control ECU connectors.
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|