DESCRIPTION
The stop light switch assembly is part of a duplex system that transmits two signals: STP and ST1-. These two signals are used by the ECM to monitor whether or not the brake system is working properly. This DTC indicates that the stop light switch assembly remains on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly. The ECM stores the DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Note |
---|---|---|---|---|---|
P070312 | Brake Switch "B" Circuit Short to Battery | The stop light switch assembly remains on even when vehicle repeats 5 cycles of STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) (2 trip detection logic). |
| - | SAE: P0724 |
MONITOR DESCRIPTION
This DTC indicates that the stop light switch assembly remains on. When the stop light switch assembly remains on during "STOP and GO" driving, the ECM interprets this as a fault in the stop light switch assembly. The ECM stores the DTC. The vehicle must STOP (less than 3 km/h [1.86 mph]) and GO (30 km/h [18.65 mph] or more) 5 times during 2 driving cycles, in order to detect a malfunction.
MONITOR STRATEGY
Required Sensors/Components (Main) | Stop light switch assembly |
Required Sensors/Components (Related) | Speed sensor |
Frequency of Operation | Continuous |
CONFIRMATION DRIVING PATTERN
HINT:
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
GTS Display | Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
HINT:
WIRING DIAGRAM
Refer to DTC P05042B.
Click here
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
HINT:
Click here
PROCEDURE
1. | READ VALUE USING GTS (STOP LIGHT SW) |
(a) Enter the following menus.
Powertrain > Engine > Data List Tester Display |
---|
Stop Light SW |
(b) Read the Data List displayed on the GTS.
OK:
GTS Display | Measurement Item/Range (Display) | Normal Condition |
---|---|---|
Stop Light SW | Stop light switch assembly status: ON or OFF |
|
OK | CHECK FOR INTERMITTENT PROBLEMS |
|
2. | CHECK STOP LIGHT SWITCH ASSEMBLY INSTALLATION |
(a) Check the stop light switch installation.
Click here
OK:
Stop light switch is installed correctly.
NG | SECURELY REINSTALL STOP LIGHT SWITCH ASSEMBLY |
|
3. | CHECK TERMINAL VOLTAGE (STP VOLTAGE) |
*a | Brake Pedal Depressed |
*b | Brake Pedal Released |
(a) Disconnect the ECM connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection | Brake Pedal Operation | Specified Condition |
---|---|---|
A106-21(STP) - Body ground | Released | Below 1.5 V |
Depressed | 7.5 to 14 V |
HINT:
If there is a short in the STP terminal circuit, there may be a malfunction in the circuit of a connected ECU.
OK | REPLACE ECM |
|
4. | CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) |
(a) Disconnect the stop light switch assembly connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A63-3(L) or A106-21(STP) - Other terminals | Always | 10 kΩ or higher |
OK | REPLACE STOP LIGHT SWITCH ASSEMBLY |
NG | REPAIR OR REPLACE HARNESS OR CONNECTOR |
WARNING
When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it
Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is removed too quickly.