| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000002643S |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - 11/2022] |
| Title: ADVANCED DRIVER ASSISTANCE SYSTEM: DYNAMIC RADAR CRUISE CONTROL SYSTEM (for TMMMS Made): P0571; Stop Light Switch Circuit Malfunction; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022] | ||
|
DTC |
P0571 |
Stop Light Switch Circuit Malfunction |
DESCRIPTION
- When the brakes are applied by the dynamic radar cruise control system, the skid control ECU (brake actuator assembly) operates the stop light switch assembly (stop light control relay) to illuminate the stop lights.
- If the ECM receives a signal from the skid control ECU (brake actuator assembly) indicating a malfunction of the stop light control relay, DTC P0571 is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
P0571 |
Stop Light Switch Circuit Malfunction |
When the dynamic radar cruise control system is operating, the ECM detects a signal indicating a stop light control relay malfunction from the skid control ECU (brake actuator assembly) for approximately 0.5 second or more. |
Condition 1:
Condition 2:
|
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
![2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; 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 FOR DTCs |
(a) Check if electronically controlled brake system DTCs are output.
Chassis > Brake > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
Electronically controlled brake system DTCs are not output |
A |
|
Electronically controlled brake system DTCs are output |
B |
| B |
|
GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM w/ Electric Parking Brake System: Click here
w/o Electric Parking Brake System: Click here
|
|
|
2. |
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 |
Ignition switch off |
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 |
|
|
3. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
(a) Inspect the stop light switch assembly.
Click here
| NG |
|
|
|
4. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) |
(a) Disconnect the A46 ECM connector.
(b) Disconnect the A53 stop light switch assembly connector.
(c) Disconnect the A51 skid control ECU (brake actuator assembly) connector.*4
(d) Disconnect the A100 skid control ECU (brake actuator assembly) connector.*5
(e) Disconnect the O61 certification ECU (smart key ECU assembly) connector.*1
(f) Disconnect the I17 shift lock control ECU (shift lock control unit assembly) connector.*2
(g) Disconnect the I18 shift lock control ECU (shift lock control unit assembly) connector.*3
(h) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A53-5 (L) - A46-10 (ST1-) |
Always |
Below 1 Ω |
|
A53-3 (L) - A46-9 (STP) |
Always |
Below 1 Ω |
|
A53-5 (L) or A46-10 (ST1-) - Body ground |
Always |
10 kΩ or higher |
|
A53-3 (L) or A46-9 (STP) - Body ground |
Always |
10 kΩ or higher |
(i) Connect the I18 shift lock control ECU (shift lock control unit assembly) connector.*3
(j) Connect the I17 shift lock control ECU (shift lock control unit assembly) connector.*2
(k) Connect the O61 certification ECU (smart key ECU assembly) connector.*1
(l) Connect the A100 skid control ECU (brake actuator assembly) connector.*5
(m) Connect the A51 skid control ECU (brake actuator assembly) connector.*4
(n) Connect the A53 stop light switch assembly connector.
(o) Connect the A46 ECM connector.
- *1: w/ Smart Key System
- *2: for CVT without Smart Key System
- *3: for CVT with Smart Key System
- *4: w/ Electrical Parking Brake System
- *5: w/o Electrical Parking Brake System
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|