Inspection Procedure

WARNING: This page is about a different variant/trim than selected.

HINT:

If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the under surface of seat cushion.
In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

CHECK DTC
1. Turn the power switch on (IG).
2. Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
3. Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/10-) ).
4. Turn the power switch off.
5. Turn the power switch on (IG).
6. Check the DTCs (See DTC CHECK/CLEAR ).
  OK: DTC B1790 is not output.
  
  HINT:
  
  Codes other than DTC B1790 may be output at this time, but they are not related to this check.
OK: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

NG: Go To Next Step
CHECK CONNECTION OF CONNECTORS
1. Turn the power switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Check that the connectors are properly connected to the occupant classification ECU and the center airbag sensor assembly.
  OK: The connectors are properly connected.
NG: CONNECT CONNECTORS PROPERLY, THEN GO TO STEP 1

OK: Go To Next Step
CHECK VEHICLE CONDITION
1. Check the passenger seat type.
  Result:
  1. for Manual seat
  2. for Power seat
B: Go to STEP 13

A: Go To Next Step

CHECK FLOOR WIRE NO. 2 (SHORT TO B+)

Disconnect the connector from the center airbag sensor assembly and occupant classification ECU.

Fig 1: Identifying Floor Wire No. 2 (Short To B+)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the negative (-) terminal cable to the battery.
Turn the power switch on (IG).

Measure the voltage according to the value (s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
O4-8 (FSR+) - Body ground	Power switch on (IG)	Below 1 V
O4-4 (FSR-) - Body ground	Power switch on (IG)	Below 1 V

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: Go To Next Step

CHECK FLOOR WIRE NO. 2 (OPEN)

Turn the power switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Using a service wire, connect terminals 12 (FSP+) and 13 (FSP-) of connector B.
NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
O4-8 (FSR+) -O4-4 (FSR-)	Always	Below 1 Ω

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

Fig 2: Checking Floor Wire No. 2 (Open)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go To Next Step

CHECK FLOOR WIRE NO. 2 (SHORT)

Disconnect the service wire from connector B.

Fig 3: Identifying Floor Wire No. 2 (Short)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
O4-8 (FSR+) - O4-4 (FSR-)	Always	1 MΩ or Higher

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: Go To Next Step

CHECK FLOOR WIRE NO. 2 (SHORT TO GROUND)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
O4-8 (FSR+) - Body ground	Always	1 MΩ or Higher
O4-4 (FSR-) - Body ground	Always	1 MΩ or Higher

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

Fig 4: Checking Floor Wire No. 2 (Short To Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go To Next Step

RECHECK DTC
1. Connect the connectors to the occupant classification ECU and the center airbag sensor assembly.
2. Connect the intelligent tester to the DLC3.
3. Connect the negative (-) terminal cable to the battery.
4. Turn the power switch on (IG).
5. Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
6. Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/10-) ).
7. Turn the power switch off.
8. Turn the power switch on (IG).
9. Using the intelligent tester, check the DTCs of the occupant classification ECU (See DTC CHECK/CLEAR ).
  OK: DTC B1790 is not output.
  
  HINT:
  
  Codes other than DTC B1790 may be output at this time, but they are not related to this check.
OK: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

NG: Go To Next Step
REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the power switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the occupant classification ECU (See REMOVAL (2006/10-) ).
  HINT:
  
  Perform the inspection using parts from a normal vehicle if possible.
PERFORM ZERO POINT CALIBRATION
1. Connect the negative (-) terminal cable to the battery.
2. Connect the intelligent tester to the DLC3.
3. Turn the power switch on (IG).
4. Using the intelligent tester, perform "zero point calibration" (See INITIALIZATION ).
  OK: "COMPLETED" is displayed.
PERFORM SENSITIVITY CHECK
1. Using the intelligent tester, perform "sensitivity check" (See INITIALIZATION ).
  Standard value: 27 to 33 kg (59.52 to 72.75 lb)

RECHECK DTC

Turn the power switch on (IG).
Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/10-) ).
Turn the power switch off.
Turn the power switch on (IG).

Using the intelligent tester, check the DTCs of the occupant classification ECU (See DTC CHECK/CLEAR ).

OK: DTC B1790 is not output.

HINT:

Codes other than DTC B1790 may be output at this time, but they are not related to this check.

Result

RESULT TABLE

Result	Proceed to
OK	A
NG (for TMC Made)	B
NG (for TMMK Made)	C

B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See REMOVAL )

C: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See REMOVAL )

A: END

CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (TO B+)

Disconnect the connector from the center airbag sensor assembly and occupant classification ECU.

Fig 5: Identifying Occupant Classification System Circuit (To B+)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Connect the negative (-) terminal cable to the battery.
Turn the power switch on (IG).

Measure the voltage according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-8 (FSR+) - Body ground	Power switch on (IG)	Below 1 V
T10-4 (FSR-) - Body ground	Power switch on (IG)	Below 1 V

NG: Go to STEP 22

OK: Go to Next Step

CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (OPEN)

Turn the power switch off.
Disconnect the negative (-) terminal cable from the battery.

Fig 6: Identifying Occupant Classification System Circuit (Open)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Using a service wire, connect terminals 12 (FSP+) and 13 (FSP-) of connector B.
NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-8 (FSR+) - T10-4 (FSR-)	Always	Below 1 Ω

NG: Go to STEP 23

OK: Go To Next Step

CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT)

Disconnect the service wire from connector B.

Fig 7: Identifying Occupant Classification System Circuit (Short)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED TABLE

Tester connection	Condition	Specified condition
T10-8 (FSR+) - T10-4 (FSR-)	Always	1 MΩ or Higher

NG: Go to STEP 24

OK: Go To Next Step

CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (TO GROUND)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-8 (FSR+) - Body ground	Always	1 MΩ or Higher
T10<4 (FSR-) - Body ground	Always	1 MΩ or Higher

NG: Go to STEP 25

OK: Go To Next Step

RECHECK DTC
1. Connect the connectors to the occupant classification ECU and the center airbag sensor assembly.
  
  Fig 8: Identifying Checking Occupant Classification System Circuit (To Ground)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the intelligent tester to the DLC3.
3. Connect the negative (-) terminal cable to the battery.
4. Turn the power switch on (IG).
5. Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
6. Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/10-) ).
7. Turn the power switch off.
8. Turn the power switch on (IG).
9. Using the intelligent tester, check the DTCs of the occupant classification ECU (See DTC CHECK/CLEAR ).
  OK: DTC B1790 is not output.
  
  HINT:
  
  Codes other than DTC B1790 may be output at this time, but they are not related to this check.
OK: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

NG: Go To Next Step
REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the power switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the occupant classification ECU (See REMOVAL (2006/10-) ).
  HINT:
  
  Perform the inspection using parts from a normal vehicle if possible.
PERFORM ZERO POINT CALIBRATION
1. Connect the negative (-) terminal cable to the battery.
2. Connect the intelligent tester to the DLC3.
3. Turn the power switch on (IG).
4. Using the intelligent tester, perform "zero point calibration" (See INITIALIZATION ).
  OK: "COMPLETED" is displayed.
PERFORM SENSITIVITY CHECK
1. Using the intelligent tester, perform "sensitivity check" (See INITIALIZATION ).
  Standard value: 27 to 33 kg (59.52 to 72.75 lb)

RECHECK DTC

Turn the power switch on (IG).
Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR ).
Turn the power switch off.
Turn the power switch on (IG).

Using the intelligent tester, check the DTCs of the occupant classification ECU (See DTC CHECK/CLEAR (2006/10-) ).

OK: DTC B1790 is not output.

HINT:

Codes other than DTC B1790 may be output at this time, but they are not related to this check.

Result

RESULT TABLE

Result	Proceed to
OK	A
NG (for TMC Made)	B
NG (for TMMK Made)	C

B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See REMOVAL )

C: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See REMOVAL )

A: END

CHECK FLOOR WIRE NO. 2 (TO B+)

Turn the power switch off.
Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
Disconnect the front seat wire RH connector from the floor wire No. 2.

Fig 9: Identifying Front Seat Wire RH Connector & Floor Wire No. 2 (To B+)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
Turn the power switch on (IG).

Measure the voltage according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
OT1-1(FSR+)-Body ground	Power switch on (IG)	Below 1 V
OT1-4 (FSR-) - Body ground	Power switch on (IG)	Below 1 V

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: REPAIR OR REPLACE FRONT SEAT WIRE RH

CHECK FLOOR WIRE NO. 2 (OPEN)

Disconnect the front seat wire RH connector from the floor wire No 2.

Fig 10: Identifying Front Seat Wire RH Connector & Floor Wire No. 2 (Open)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

The service wire has already been inserted into connector B.

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
OT1-1 (FSR+) - OT1-4 (FSR-)	Always	Below 1Ω

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: REPAIR OR REPLACE FRONT SEAT WIRE RH

CHECK FLOOR WIRE NO. 2 (SHORT)

Disconnect the front seat wire RH connector from the floor wire No. 2.

Fig 11: Identifying Front Seat Wire RH Connector & Floor Wire No. 2 (Short)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
OT1-1 (FSR+) - OT1-4 (FSR-)	Always	1 MΩ or Higher

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: REPAIR OR REPLACE FRONT SEAT WIRE RH

CHECK FLOOR WIRE NO. 2 (TO GROUND)

Disconnect the front seat wire RH connector from the floor wire No. 2.

Fig 12: Identifying Front Seat Wire RH Connector & Floor Wire No. 2 (To Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
OT1-1 (FSR+) - Body ground	Always	1 MΩ or Higher
OT1-4 (FSR-) - Body ground	Always	1 MΩ or Higher

NG: REPAIR OR REPLACE FLOOR WIRE NO. 2

OK: REPAIR OR REPLACE FRONT SEAT WIRE RH