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 |
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. |
| Cruise Control |
WIRING DIAGRAM
for A25A-FKS
for 2GR-FKS
CAUTION / NOTICE / HINT
NOTICE:
w/ Smart Key System: Click here
w/o Smart Key System: Click here
PROCEDURE
1. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - BATTERY AND BODY GROUND) |
(a) Disconnect the 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 |
---|---|---|
A81-2 (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 |
---|---|---|
A81-7 (B) - Body ground |
Always | 11 to 14 V |
A81-6 (B) - Body ground |
Ignition switch ON | 11 to 14 V |
Ignition switch off | Below 1 V |
NG | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
INSPECT STOP LIGHT SWITCH ASSEMBLY |
Click here
NG | ![]() | REPLACE STOP LIGHT SWITCH ASSEMBLY |
|
3. |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) |
(a) Disconnect the A81 stop light switch assembly connector.
(b) Disconnect the A24*1 or A21*2 ECM connector.
(c) Disconnect each ECU connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for A25A-FKS:
Tester Connection | Condition |
Specified Condition |
---|---|---|
A81-3 (L) - A24-21 (STP) |
Always | Below 1 Ω |
A81-5 (L) - A24-22 (ST1-) |
Always | Below 1 Ω |
A81-3 (L) or A24-21 (STP) - Body ground |
Always | 10 kΩ or higher |
A81-5 (L) or A24-22 (ST1-) - Body ground |
Always | 10 kΩ or higher |
Tester Connection | Condition |
Specified Condition |
---|---|---|
A81-3 (L) - A21-27 (STP) |
Always | Below 1 Ω |
A81-5 (L) - A24-42 (ST1-) |
Always | Below 1 Ω |
A81-3 (L) or A21-27 (STP) - Body ground |
Always | 10 kΩ or higher |
A81-5 (L) or A24-42 (ST1-) - 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 |