Front Passenger Side Seat Belt Warning Light Malfunction: Procedure

1. Operate Techstream according to the steps on the display and select "ACTIVE TEST".

   Combination Meter

   Tester Display	Test Part	Control Range	Diagnostic Note
   Front Passenger Side Seat Belt Remind	Front passenger side seat belt indicator light	OFF/ON	Confirm that the vehicle is stopped with the engine idling

   Result

   OK (w/o Multi-display)	A
   OK (w/ Multi-display)	B
   NG	C

   OK

   Switch condition (ON/OFF) can be switched by "ACTIVE TEST".

B → See step   5 

C → GO TO COMBINATION METER SYSTEM 

A: Go to next step 

1. Disconnect the integration control & panel connector.

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

   Voltage

   Tester Connection	Condition	Specified Condition
   J54-4 (IG+) - Body ground	Engine switch on (IG)	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the integration control & panel connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Apply battery voltage to the connector according to the table below.

   Voltage

   Condition	Specified Condition
   Battery positive (+) → Terminal 4 (IG+) Battery negative (-) → Terminal 13 (PBEW)	Lights up (Seat belt warning light)

NG → REPLACE INTEGRATION CONTROL & PANEL 

OK: Go to next step 

1. Disconnect the combination meter assembly and integration control & panel connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance

   Tester Connection	Condition	Specified Condition
   J35-3 (PBLT) - J54-13 (PBEW)	Always	Below 1 Ω
   J35-3 (PBLT) - Body ground	Always	10 kΩ or higher

OK → See step   8 

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the clock assembly connector.

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

   Voltage

   Tester Connection	Condition	Specified Condition
   J92-15 (IG+) - Body ground	Engine switch on (IG)	10 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the clock assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Apply battery voltage to the connector according to the table below.

   Voltage

   Condition	Specified Condition
   Battery positive (+) → Terminal 15 (IG+) Battery negative (-) → Terminal 12 (PBEW)	Lights up (Seat belt warning light)

NG → REPLACE CLOCK ASSEMBLY 

OK: Go to next step 

1. Disconnect the combination meter assembly and clock assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance

   Tester Connection	Condition	Specified Condition
   J35-3 (PBLT) - J92-12 (PBEW)	Always	Below 1 Ω
   J35-3 (PBLT) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the occupant detection sensor connector.

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

   Resistance

   Tester Connection	Condition	Specified Condition
   A-1 - A-3	The passenger seat is occupied	Below 100 Ω
   A-1 - A-3	The passenger seat is not occupied	Below 1 MΩ

NG → REPLACE SEPARATE TYPE FRONT SEAT CUSHION COVER (OCCUPANT DETECTION SENSOR) 

OK: Go to next step 

1. Disconnect the front seat inner belt RH connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance

   Tester Connection	Condition	Specified Condition
   J35-4 (P/SB) - T3-1 (WS+)	Always	Below 1 Ω
   T3-4 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the front seat inner belt assembly (Passenger side).

   OK

   Seat belt warning operation returns to normal.

NG → REPLACE COMBINATION METER 

OK → END