Front Passenger Side Seat Belt Warning Light Malfunction: Procedure

CHECK FOR DTCs

Check for DTCs.

Result

Result	Proceed to
No output DTC	A
Output DTC (CAN communication)	B
Output DTC (Occupant detection)	C

B → See step 5

C → See step 6

A: Go to next step

PERFORM ACTIVE TEST USING TECHSTREAM

Read the DATA LIST according to the displays on the tester screen.

COMBINATION METER

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

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

NG → See step 3

OK → See step 7

CHECK WIRE HARNESS (BATTERY POSITIVE AND BODY GROUND)

Disconnect the E19 connector.

Fig 1: Identifying E19 Connector Terminal Identification (Battery Positive And Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard voltage

Tester Connection	Condition	Specified Condition
E19-1 (B) - Body ground	Ignition switch on (IG)	11 to 14 V

Standard resistance

Tester Connection	Condition	Specified Condition
E19-5 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR, OR REPLACE FUSE

OK: Go to next step

CHECK HARNESS OR CONNECTOR

Disconnect the E1 connector.

Fig 2: Identifying Front Passenger Seat Beat Warning Light And Combination Meter Connector Terminal Identification
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard resistance

Tester Connection	Condition	Specified Condition
E1-31 (PBLT) - E19-3 (PBEW)	Always	Below 1 Ω
E1-31 (PBLT) or E19-3 (PBEW) - Body ground	Always	10 kΩ or higher

Proceed to the next step based on the inspection result.

Result

A → REPAIR OR REPLACE HARNESS OR CONNECTOR

B → See step 9

C → See step 8