| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001H088 |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [01/2019 - 09/2022] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for M20A-FKS): P057162; Brake Switch "A" Signal Compare Failure; 2020 - 2022 MY Corolla Corolla Hatchback [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 ECM. The ECM uses this signal to control cancellation of vehicle speed by the dynamic radar cruise control. When the ECM 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 |
MIL |
DTC Output from |
|---|---|---|---|---|---|
|
P057162 |
Brake Switch "A" Signal Compare Failure |
When the ignition switch is ON and the dynamic radar cruise control system is operating, the ECM detects that the voltage at terminal STP and ST1- are both less than 1 V for approximately 0.5 seconds or more. |
|
Does not come on |
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 ECM, refer to Registration.
w/o Smart Key System: Click here
![2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION](/t3Portal/stylegraphics/info.gif)
w/ Smart Key System: Click here
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY 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 |
Ignition switch ON |
11 to 14 V |
|
A53-6 (B) - Body ground |
Ignition 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 (ECM - STOP LIGHT SWITCH ASSEMBLY) |
(a) Disconnect the A47 ECM connector.
(b) Disconnect the A53 stop light switch assembly connector.
(c) Disconnect the A51 skid control ECU (brake actuator assembly) connector.
(d) Disconnect the O61 certification ECU (smart key ECU assembly) connector.*
(e) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.*
(f) Disconnect the C80 TCM connector.*
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A47-22 (ST1-) - A53-5 (L) |
Always |
Below 1 Ω |
|
A47-21 (STP) - A53-3 (L) |
Always |
Below 1 Ω |
|
A47-22 (ST1-) or A53-5 (L) - Body ground |
Always |
10 kΩ or higher |
|
A47-21 (STP) or A53-3 (L) - Body ground |
Always |
10 kΩ or higher |
(h) Connect the C80 TCM connector.*
(i) Connect the I17 shift lock control ECU (shift lock control unit assembly) connector.*
(j) Connect the O61 certification ECU (smart key ECU assembly) connector.*
(k) Connect the A51 skid control ECU (brake actuator assembly) connector.
(l) Connect the A53 stop light switch assembly connector.
(m) Connect the A47 ECM connector.
- *: w/ Smart Key System
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|