Inspection Procedure

Result

HINT:

If both security indicator lights are malfunctioning, there may be a malfunction in the certification ECU.

B: REPLACE CERTIFICATION ECU  (See REMOVAL )

A: Go to next step 

1. Intelligent tester

   SMART ACCESS 

   RESULT REFERENCE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   SECURITY INDIC	Security indicator	ON/OFF	-

2. Techstream

   Smart Access 

   CONTROL RANGE REFERENCE
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Security Indicator	Security indicator	ON/OFF	-

   OK: Security indicator illuminates. 

   NG:  Go to step  3

   OK: REPLACE CERTIFICATION ECU  (See REMOVAL )

3. CHECK HARNESS AND CONNECTOR (DOOR ECU - SECURITY INDICATOR) 
   1. Disconnect the P10*1 or P4*2 ECU connector.
   2. Disconnect the P9*1 or P3*2 indicator connector
   3. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   for LH 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P10-8 (SID+) - P9-2 (LP1)	Always	Below 1 Ω
   P10-9 (SID-) - P9-1 (E1)	Always	Below 1 Ω
   P10-8 (SID+) or P9-2 (LP1) - Body ground	Always	10 kΩ or higher
   P10-9 (SID-) or P9-1 (E1) - Body ground	Always	10 kΩ or higher

   Fig 1: Identifying Front View Of Harness Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   for RH 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   P4-8 (SID+) - P3-2 (LP2)	Always	Below 1 Ω
   P4-9 (SID-) - P3-1 (E2)	Always	Below 1 Ω
   P4-8 (SID+) or P3-2 (LP2) - Body ground	Always	10 kΩ or higher
   P4-9 (SID-) or P3-1 (E2) -Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

4. CHECK HARNESS AND CONNECTOR (DOOR ECU - CERTIFICATION ECU AND BODY GROUND) 
   Fig 2: Checking Harness And Connector (Door ECU - Certification ECU And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Disconnect the N10*1 or N1*2 ECU connector.
   2. Disconnect the L15 ECU connector
   3. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   for LH 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   N10-23 (SID1) - L15-2 (IND)	Always	Below 1 Ω
   N10-1 (GND) - Body ground	Always	Below 1 Ω
   N10-23 (SID1) or L15-2 (IND) - Body ground	Always	10 kΩ or higher

   for RH 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   N1-23 (SID1) - L15-2 (IND)	Always	Below 1 Ω
   NM (GND) - Body ground	Always	Below 1 Ω
   N1-23 (SID1) or L15-2 (IND) - Body ground	Always	10 kΩ or higher

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK: Go to next step 

5. INSPECT INDICATOR LIGHT ASSEMBLY 
   1. Remove the indicator light (see REMOVAL ).
   2. Apply battery voltage and check the operation of the indicator light.

      OK

   VOLTAGE SPECIFICATION
   
   

   Measurement Condition	Specified Condition
   Battery positive (+) → Terminal 2 (LP1*1, LP2*2) Battery positive (+) → Terminal 1 (E1*1, E2*2)	Illuminates

   Fig 3: Checking Operation Of Indicator Light

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not turn on.
   • A voltage of more than 12 V will damage the security indicator.
   • If the voltage is too low, the security indicator will not turn on.

   NG: REPLACE INDICATOR LIGHT ASSEMBLY  (See REMOVAL )

   OK: Go to next step 

6. CHECK FRONT DOOR ECU (OPERATION) 
   1. Temporarily replace the front door ECU with a new or normally functioning one (See REMOVAL ).
   2. Check that the security indicator operates normally.

      OK: Security indicator operates normally. 

      NG: REPLACE CERTIFICATION ECU  (See REMOVAL )

      OK: REPLACE FRONT DOOR ECU  (See REMOVAL )