Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT STOP LIGHT SWITCH OPERATION

Check that the stop lights come on while the brake pedal is depressed, and go off when the brake pedal is released.

BRAKE PEDAL CONDITION

Brake Pedal Condition	Stop Light Condition
Depressed	ON
Released	OFF

NG: INSPECT STOP LIGHT SWITCH CIRCUIT

OK: Go to Next Step

INSPECT STOP LIGHT SWITCH ASSEMBLY

Disconnect the stop light switch assembly connector.

Fig 1: Identifying Stop Light Switch Assembly

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Measure the resistance.

Standard resistance

STANDARD RESISTANCE

Tester Connection	Switch Condition	Stop Light Condition
1 - 2	Switch pin free (Brake pedal depressed)	Below 1Ω
3 - 4	Switch pin free (Brake pedal depressed)	10 kΩ or higher
1 - 2	Switch pin pushed in (Brake pedal released)	10 kΩ or higher
3 - 4	Switch pin pushed in (Brake pedal released)	Below 1 Ω

Reconnect the stop light switch assembly connector.

NG: REPLACE STOP LIGHT SWITCH ASSEMBLY (See REMOVAL )

OK: Go to Next Step

INSPECT ECM (STP SIGNAL)

Disconnect the E47 ECM connector.

Fig 2: Identifying E47 ECM Connector Terminals

Turn the ignition switch to the ON position.

Measure the voltage.

Standard voltage

STANDARD VOLTAGE

Tester Connection	Brake Pedal Condition	Specified Condition
STP (E47-15) - Body ground	Depressed	11 to 14 V
STP (E47-15) - Body ground	Released	Below 1V
ST1 - (E47-16) - Body ground	Depressed	Below 1V
ST1 - (E47-16) - Body ground	Released	11 to 14 V

Reconnect the ECM connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

OK: REPLACE ECM (See REMOVAL )