Inspection Procedure

1. Check that the manual door lock and unlock function operates normally.

   OK: Manual door lock and unlock function operates normally. 

NG:  GO TO POWER DOOR LOCK CONTROL SYSTEM 

OK: GO TO Next Step 

1. Select the ACTIVE TEST, use the intelligent tester to generate a control command, and then check that the oscillator operates.

   Certification ECU: 

   CERTIFICATION ECU REFERENCE CHART
   
   

   Item	Test Details
   D TRANSMITTER	Driver side oscillator ON / OFF

   OK: When key is brought close to door oscillator that is OFF, indicator light on key illuminates. 

OK: REPLACE CERTIFICATION ECU 

NG: GO TO Next Step 

1. Disconnect the U28 ECU connector.
2. Disconnect the q2 oscillator connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   U28-33 (CLG1) - q2-10 (CLG)	Below 1 Ω
   U28-34 (CG1B) - q2-5 (CLGB)	Below 1 Ω
   U28-33 (CLG1) or q2-10 (CLG) - Body ground	10 kΩ or higher
   U28-34 (CG1B) or q2-5 (CLGB) - Body ground	10 kΩ or higher

Fig 1: Identifying U28 ECU And Q2 Oscillator Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Disconnect the q2 oscillator connector.
2. Disconnect the q1 antenna connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   q2-2 (SGT) - q1-6 (SGT2)	Below 1 Ω
   q2-3 (ANT1) - q1-5 (ANT1)	Below 1 Ω
   q2-8 (ANT2) - q1-2 (ANT2)	Below 1 Ω
   q2-9 (TRG-) - q1-1 (TRG-)	Below 1 Ω
   q2-2 (SGT) or q1-6 (SGT2) - Body ground	10 kΩ or higher
   q2-3 (ANT1) or q1-5 (ANT1) - Body ground	10 kΩ or higher
   q2-8 (ANT2) or q1-2 (ANT2) - Body ground	10 kΩ or higher
   q2-9 (TRG-) or q1-1 (TRG-) - Body ground	10 kΩ or higher

Fig 2: Identifying Q2 Oscillator And Q1 Antenna Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Disconnect the q2 oscillator connector.
2. Disconnect the N4 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   q2-1 (+B) - N4-7 (OSCB)	Below 1 Ω
   q2-7 (GND) - N4-20 (OSCE)	Below 1 Ω
   q2-1 (+B) or N4-7 (OSCB) - Body ground	10 kΩ or higher
   q2-7 (GND) or N4-20 (OSCE) - Body ground	10 kΩ or higher

Fig 3: Identifying Q2 Oscillator And N4 ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. Disconnect the q1 oscillator connector.
2. Disconnect the N4 ECU connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART
   
   

   Tester Connection	Specified Condition
   q1-3 (TRG+) - N4-18 (TRG+)	Below 1 Ω
   q1-3 (TRG+) or N4-18 (TRG+) - Body ground	10 kΩ or higher

Fig 4: Identifying Q1 Oscillator And N4 ECU Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

1. After replacing the electrical key antenna front LH with a normal one, check that the entry lock and unlock functions operate normally.

   OK: Entry lock and unlock functions operate normally. 

OK: END (ELECTRICAL KEY ANTENNA FRONT LH IS DEFECTIVE) 

NG: GO TO Next Step 

1. After replacing the door electrical key oscillator front LH with a normal one, check that the entry lock and unlock functions operate normally.

   OK: Entry lock and unlock functions operate normally. 

NG: REPLACE CERTIFICATION ECU 

OK: END (DOOR ELECTRICAL KEY OSCILLATOR FRONT LH IS DEFECTIVE)