| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000014TFB |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [06/2017 - 10/2020] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P057162; Brake Switch "A" Signal Compare Failure; 2018 - 2020 MY Camry [06/2017 - 10/2020] | ||
|
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 terminal STP. When the brake is applied, voltage is normally applied to 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 ignition switch is ON and the dynamic radar cruise control system is operating, voltage of STP terminal and that of ST1- terminal of ECM are less than 1 V for approximately 0.5 seconds or more. |
|
Does not come on |
WIRING DIAGRAM
for A25A-FKS:
for 2GR-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.
w/o Smart Key System:
![2018 - 2019 MY Camry [03/2017 - 09/2019]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION](/t3Portal/stylegraphics/info.gif)
w/ Smart Key System:
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY AND BODY GROUND) |
|
(a) Disconnect the A37 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 |
|---|---|---|
|
A37-2 (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 |
|---|---|---|
|
A37-7 (B) - Body ground |
Always |
11 to 14 V |
|
A37-6 (B) - Body ground |
Ignition switch ON |
11 to 14 V |
|
A37-6 (B) - Body ground |
Ignition switch off |
Below 1 V |
| 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) for A25A-FKS:
(1) Disconnect the A24 ECM connector.
(2) Disconnect the A37 stop light switch assembly connector.
(3) Disconnect the A33 skid control ECU (brake actuator assembly) connector (w/o Electric Parking Brake System).
(4) Disconnect the A34 skid control ECU (brake actuator assembly) connector (w/ Electric Parking Brake System).
(5) Disconnect the R8 certification ECU (smart key ECU assembly) connector (w/ Smart Key System).
(6) Disconnect the K28 shift lock control ECU (shift lock control unit assembly) connector (w/o Smart Key System).
(7) Disconnect the K27 shift lock control ECU (shift lock control unit assembly) connector (w/ Smart Key System).
(8) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A24-22 (ST1-) - A37-5 (L) |
Always |
Below 1 Ω |
|
A24-21 (STP) - A37-3 (L) |
Always |
Below 1 Ω |
|
A24-22 (ST1-) or A37-5 (L) - Body ground |
Always |
10 kΩ or higher |
|
A24-21 (STP) or A37-3 (L) - Body ground |
Always |
10 kΩ or higher |
(b) for 2GR-FKS:
(1) Disconnect the A21 ECM connector.
(2) Disconnect the A37 stop light switch assembly connector.
(3) Disconnect the A34 skid control ECU (brake actuator assembly) connector.
(4) Disconnect the R8 certification ECU (smart key ECU assembly) connector.
(5) Disconnect the K27 shift lock control ECU (shift lock control unit assembly) connector.
(6) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A21-42 (ST1-) - A37-5 (L) |
Always |
Below 1 Ω |
|
A21-27 (STP) - A37-3 (L) |
Always |
Below 1 Ω |
|
A21-42 (ST1-) or A37-5 (L) - Body ground |
Always |
10 kΩ or higher |
|
A21-27 (STP) or A37-3 (L) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM for A25A-FKS: Click here
for 2GR-FKS: Click here
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|