Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

READ VALUE OF INTELLIGENT TESTER (STOP LIGHT SWITCH)

Check the DATA LIST for proper functioning of the stop light switch.

ECM

ECM - DATA LIST

Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
ST LIGHT SW M	Stop light switch signal (Main CPU) / ON or OFF	ON: Brake pedal is depressed OFF: Brake pedal is released	-

OK: Display changes according to brake pedal operation described in above table.

NG: REPLACE ECM

OK: Go TO NEXT STEP.

INSPECT FUSE (STOP, IGN, IG2)
1. Remove the STOP and IGN fuses from the instrument panel junction block.
2. Remove the IG2 fuse from the engine room No. 1 relay block.
3. Measure the resistance of the fuses.
  Standard resistance:
  
  Below 1 Ω
NG: REPLACE FUSE

OK: Go TO NEXT STEP.

INSPECT IG2 RELAY

Remove the IG2 relay from the instrument panel junction block.

Measure the resistance of the relay.

Fig 1: Identifying IG2 Relay Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

NG: REPLACE IG2 RELAY

OK: Go TO NEXT STEP.

INSPECT STOP LIGHT SWITCH

Remove the stop light switch.

Measure the resistance of the switch.

Fig 2: Inspecting Stop Light Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
1 - 2	Not pushed	Below 1 Ω
3 - 4	Pushed	Below 1 Ω
1 - 2	Pushed	10 kΩ or higher
3 - 4	Not pushed	10 kΩ or higher

NG: REPLACE STOP LIGHT SWITCH

OK: Go TO NEXT STEP.

CHECK WIRE HARNESS (SWITCH - BATTERY)

Disconnect the A3 switch connector.

Measure the voltage of the wire harness side connector.

Fig 3: Identifying A3 Switch Harness Connector Terminals

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
A3-3 - Body ground	Always	10 to 14 V
A3-2 - Body ground	Ignition switch ON	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: Go TO NEXT STEP.

CHECK WIRE HARNESS (ECM - BATTERY)

Disconnect the A9 ECM connector.
Turn the ignition switch ON.

Measure the voltage of the wire harness side connector.

Fig 4: Identifying A9 ECM Harness Connector Terminals

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
A9-35 (STP) - Body ground	Depressed	10 to 14 V
A9-36 (ST1-) - Body ground	Released	10 to 14 V
A9-35 (STP) - Body ground	Released	Below 1 V
A9-36 (ST1-) - Body ground	Depressed	Below 1 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM