Inspection Procedure

1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch to the ON position, and turn the hand-held tester main switch on.
3. Select the item "STP LIGHT SW2 M", "STP LIGHT SW2 S" and "STP LIGHT SW1 S" in the DATA LIST, and read its value displayed on the hand-held tester.
4. Check that the stop lamps come on when the brake pedal is depressed, and go off when the brake pedal is released.

CCS (ECM): 

Fig 1: Data List Item Display Conditions Reference Table

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OK: 

When the brake pedal is operated, the normal conditions listed above are shown on the display. 

Result: 

1. B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  ) 
2. C: REPLACE  ECM (1ZZ-FE/2ZZ-GE)  ) 
3. A Go To Next Step 

1. Disconnect the stop lamp switch assy connector.
2. Measure the resistance according to the values in the table below.

Standard: 

Fig 2: Inspecting Stop Lamp Switch Assy

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1. NG: REPLACE STOP LAMP SWITCH ASSY 
2. OK: Go To Next Step 

Fig 3: Identifying Stop Lamp Switch Connector Terminals

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1. Measure the voltage according to the value (s) in the table below.

Standard: 

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: Go To Next Step 

1. Reconnect the stop lamp switch connector.
2. Disconnect the connector from the ECM.
3. Turn the ignition switch to the ON position.
4. Measure the voltage according to the value (s) in the table below.

Standard: 

Fig 4: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: REPLACE  ECM (1ZZ-FE/2ZZ-GE)  )