Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

Hand held tester:

CHECK OPERATION OF STOP LAMP
1. Check whether the stop lamps turn on and off normally when the brake pedal is depressed and released.
OK: Stop lamps turn ON when brake pedal is depressed.

NG: REPAIR OR REPLACE STOP LAMP SWITCH CIRCUIT

OK: Go to next step.

INSPECT STOP LAMP SWITCH ASSY

Remove the stop lamp switch assembly.

Check the resistance.

Standard:

TESTER CONNECTIONS SPECIFIED CONDITION

Switch Positions	Tester Connections	Specified Conditions
Switch pin free	1-2	Below 1Ω
Switch pin free	3-4	10 kΩ or higher
Switch pin pushed in	1-2	10 kΩ or higher
Switch pin pushed in	3-4	Below 1Ω

Reinstall the stop lamp switch assembly.

Fig 1: Inspecting Stop Lamp Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LAMP SWITCH ASSY

OK: Go to next step.

READ VALUE USING HAND HELD TESTER (STP SIGNAL)

Connect a hand-held tester to the DLC3.
Turn the ignition switch to ON and turn the tester ON.
Select the following menu items: DIAGNOSIS/ENHANCED OBD II/DATA LIST/ALL/STOP LIGHT SW.
Check the STP signal when the brake pedal is depressed and released.

OK:

BRAKE PEDAL OPERATIONS SPECIFIED CONDITION

Brake Pedal Operations	Specified Conditions
Depressed	STP signal ON
Released	STP signal OFF

Fig 2: Identifying Brake Pedal Depressed And Released

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: CHECK FOR INTERMITTENT PROBLEMS )

NG: Go to next step.

CHECK HARNESS AND CONNECTOR (STOP LAMP SWITCH - ECM)

Disconnect the S7 stop lamp switch connector.
Disconnect the E5 ECM connector.

Check the resistance.

Fig 3: Disconnecting S7 Stop Lamp Switch Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard (Check for open):

TESTER CONNECTIONS SPECIFIED CONDITION (FOR OPEN)

Tester Connections	Specified Conditions
Stop lamp switch (S7-1) - STP (E5-19)	Below 1Ω

Reconnect the ECM connector.
Reconnect the stop lamp switch connector.

Fig 4: Disconnecting E5 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REPLACEMENT )

OBD II scan tool (excluding the hand-held tester):

CHECK OPERATION OF STOP LAMP
1. Check whether the stop lamps turn on and off normally when the brake pedal is depressed and released.
  OK: Stop lamps turn ON when brake pedal is depressed.
NG: REPAIR OR REPLACE STOP LAMP SWITCH CIRCUIT

OK: Go to next step.

INSPECT STOP LAMP SWITCH ASSY

Remove the stop lamp switch assembly.

Check the resistance.

Standard:

TESTER CONNECTIONS SPECIFIED CONDITION (1 OF 2)

Switch Positions	Tester Connections	Specified Conditions
Switch pin free	1-2	Below 1Ω
Switch pin free	3-4	10 kΩ or higher
Switch pin pushed in	1-2	10 kΩ or higher
Switch pin pushed in	3-4	Below 1Ω

Reinstall the stop lamp switch assembly.

Fig 5: Inspecting Stop Lamp Switch Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LAMP SWITCH ASSY

OK: Go to next step.

INSPECT ECM (STP VOLTAGE)

Turn the ignition switch to ON.
Measure the voltage between the terminals of the E4 and E5 ECM connectors.

Standard:

TESTER CONNECTIONS SPECIFIED CONDITION (2 OF 2)

Tester Connections	Brake Pedal Operations	Specified Conditions
STP (E5-19) - E1 (E4-7)	Depressed	Between 7.5V and 14V
STP (E5-19) - E1 (E4-7)	Released	Below 1.5 V

Fig 6: Identifying Brake Pedal Depressed And Released

NG: Go to step 4

OK: CHECK FOR INTERMITTENT PROBLEMS )

CHECK HARNESS AND CONNECTOR (STOP LAMP SWITCH - ECM)

Disconnect the S7 stop lamp switch connector.
Disconnect the E5 ECM connector.

Check the resistance.

Fig 7: Disconnecting S7 Stop Lamp Switch Connector

Standard (Check for open):

TESTER CONNECTIONS SPECIFIED CONDITION (FOR OPEN)

Tester Connections	Specified Conditions
Stop lamp switch (S7-1) - STP (E5-19)	Below 1Ω

Reconnect the ECM connector.
Reconnect the stop lamp switch connector.

Fig 8: Disconnecting E5 ECM Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ECM (See REPLACEMENT )