DTC Code | DTC Name |
---|---|
P0703 | Brake Switch "B" Circuit |
DESCRIPTION
When the brake pedal is depressed, stop light switch signal STP turns on and stop light switch signal ST1- turns off. The TCM detects whether the brake pedal is depressed or released based on those signals. If the signal conditions, STP and ST1-, do not match the standard condition, the TCM interprets this as a malfunction in the stop light switch circuit and stores this DTC.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Memory |
---|---|---|---|---|---|---|
P0703 | Brake Switch "B" Circuit |
Following conditions detected simultaneously for 1.0 second or more (1-trip detection logic)
|
|
Does not come on | Comes on | DTC stored |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
READ VALUE USING GTS (BRAKE SWITCH SIGNAL 1 AND 2)
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Multi-Mode M/T / Data List / Brake Switch Signal1 and Brake Switch Signal2.
According to the display on the GTS, read the Data List.
Powertrain > Multi-Mode M/T > Data ListTester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Brake Switch Signal2 | Brake switch signal (ST1-) | OFF or ON | OFF: Brake pedal depressed ON: Brake pedal released | ST1- terminal signal of TCM |
Brake Switch Signal1 | Brake switch signal (STP) | OFF or ON | OFF: Brake pedal released ON: Brake pedal depressed | STP terminal signal of TCM |
Tester Display |
---|
Brake Switch Signal2 |
Brake Switch Signal1 |
OK |
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The normal conditions listed above are shown on the GTS when the brake pedal is operated. |
Result | |||
---|---|---|---|
|
OK |
SYMPTOM SIMULATION AND DTC CHECK Click hereНажмите здесь |
NG |
INSPECT STOP LIGHT SWITCH
Inspect the stop light switch assembly.
Click hereНажмите здесь
Result | |||
---|---|---|---|
|
NG |
REPLACE STOP LIGHT SWITCH Click here Нажмите здесь |
OK |
CHECK HARNESS AND CONNECTOR (BATTERY - STOP LIGHT SWITCH)
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||
---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH - TCM)
Reconnect the stop light switch connector.
*a |
Front view of wire harness connector (to TCM) |
Disconnect the TCM connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
REPLACE TCM
Replace the TCM.
for LHD: Click here Нажмите здесь
for RHD: Click here Нажмите здесь
Result | ||
---|---|---|
|
NEXT |
PERFORM INITIALIZATION
Perform the initialization and learning procedure.
Click hereНажмите здесь
Result | ||
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|
NEXT |
END |