Seat Belt Warning Light for Passenger Seat does not Operate: Wiring Diagram

1. Check for supplemental restraint system (SRS) DTCs.

   Result 

   RESULT REFERENCE CHART
   
   

   Result	Proceed to
   No SRS DTCs are output	A
   SRS DTCs are output	B

B : GO TO SUPPLEMENTAL RESTRAINT SYSTEM 

A : GO TO NEXT STEP 

1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the seat belt warning light operates.

   Combination meter 

   COMBINATION METER SPECIFICATION
   
   

   Item	Test Details	Diagnostic Note
   P-BELT REMIND	Seat belt warning light for passenger side / OFF or ON	Confirm that vehicle is stopped and engine is idling

   OK : Seat belt warning light for passenger side operates normally. 

NG : Go to step 3 

OK : REPLACE CENTER AIRBAG SENSOR ASSEMBLY 

1. Check that the entire combination meter operates normally.

   OK : Entire combination meter operates normally. 

NG : GO TO COMBINATION METER 

OK : GO TO NEXT STEP 

1. Remove the ECU-IG RH and AM2 fuses from the cowl side junction block LH.
2. Remove the TV fuse from the cowl side junction block RH.
3. Measure the resistance of the fuses.

   Standard resistance: Below 1 Ω 

NG : REPLACE FUSE 

OK : GO TO NEXT STEP 

1. Disconnect the K46 Multi-display connector.
2. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage 

   STANDARD VOLTAGE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   K46-3(IG) - Body ground	Engine switch on (IG)	10 to 14 V
   K46-1(+B1) - Body ground	Always	10 to 14 V

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   K46-10(GND1) - Body ground	Always	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 3: Identifying K46 Multi-Display Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : GO TO NEXT STEP 

1. Remove the multi-display.
2. Apply battery voltage to the panel and check that the light illuminates.
   Fig 4: Identifying Multi-Display (Seat Belt Warning Light For Passenger Side) Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard 

   STANDARD SPECIFICATION
   
   

   Measurement Connection	Specified Condition
   Battery positive (+) --> B-3 (IG) Battery negative (-) --> A-8 (PBEW)	Seat belt warning light for passenger side turns on

NG : REPLACE MULTI-DISPLAY 

OK : GO TO NEXT STEP 

1. Disconnect the K31 meter connector.
2. Disconnect the K48 multi-display connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection	Specified Condition
   K31-31 (PBLT) - K48-8 (PBEW)	Below 1 Ω

NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

Fig 5: Identifying K31 Meter Connector And K48 Multi-Display Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE COMBINATION METER