Inspection Procedure

WARNING: This page is about a different car, the 2009 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK WIRELESS DOOR LOCK CONTROL FUNCTION

Check the wireless door lock control functions by operating the transmitter switch.

Result

RESULT REFERENCE

Result	Proceed to
Wireless door lock functions are normal but hazard warning lights answer-back does not occur	A
Wireless door lock functions are normal but wireless door lock buzzer answer-back does not occur	B
Doors cannot be locked and unlocked using transmitter	C

B: Go to step 5

C: GO TO FLOWCHART (See PROBLEM SYMPTOMS TABLE )

A: Go to next step

CHECK HAZARD WARNING LIGHT
1. Check that the hazard warning lights flash continuously when the hazard warning signal switch is pressed.
  OK:
  
  Hazard warning lights flash continuously.
  
  NG: GO TO LIGHTING SYSTEM (See OPERATION CHECK )
  
  OK: Go to next step
REPLACE MAIN BODY ECU
1. Replace the main body ECU with a known good one.
CHECK HAZARD WARNING LIGHTS
1. Check that the hazard warning lights flash continuously when the door control transmitter LOCK or UNLOCK switch is pressed.
  OK:
  
  Hazard warning lights flash continuously.
  
  NG: REPLACE CERTIFICATION ECU (SMART KEY ECU)
  
  OK: END (MAIN BODY ECU IS DEFECTIVE)

PERFORM ACTIVE TEST USING TECHSTREAM (WIRELESS DOOR LOCK BUZZER)

Enter Active Test, using the Techstream to generate a control command, and then check that the wireless buzzer operates normally.

Main Body

MAIN BODY ACTIVE TEST REFERENCE

Tester Display	Test Part	Control Range	Diagnostic Note
Wireless Buzzer	Wireless Door Lock Buzzer	ON/OFF	-

OK:

Wireless buzzer turns ON/OFF.

NG: Go to step 6

OK: REPLACE CERTIFICATION ECU (SMART KEY ECU)

INSPECT WIRELESS DOOR LOCK BUZZER

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
1 - 2	Always	950 to 1050 Ω

NOTE: When battery voltage is directly applied to the buzzer, the buzzer does not sound.

NG: REPLACE WIRELESS DOOR LOCK BUZZER (See REMOVAL )

Fig 1: Identifying Wireless Door Lock Buzzer Connector

OK: Go to next step

CHECK WIRE HARNESS (WIRELESS DOOR LOCK BUZZER - CERTIFICATION ECU AND BODY GROUND)

Disconnect the E36 certification ECU connector and A42 wireless door lock buzzer connector.

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

Standard Resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
E36-21 (BZR) - A42-1	Always	Below 1 Ω
E36-21 (BZR) - Body ground	Always	10 kΩ or higher
A42-2 - Body ground	Always	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig 2: Identifying E36 Certification ECU And A42 Wireless Door Lock Buzzer Connectors

OK: REPLACE CERTIFICATION ECU (SMART KEY ECU)