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 (2006/03-2006/10) ).
4. Turn the power switch off.
5. Turn the power switch on (IG).
6. Check the DTCs (See DTC CHECK/CLEAR ).
  OK: DTC B1771 is not output.
  
  HINT:
  
  Codes other than DTC B1771 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 front seat inner belt assembly RH.
  OK: The connectors are properly connected.
NG: CONNECT CONNECTORS PROPERLY, THEN GO TO STEP 1

OK: Go To Next Step

CHECK WIRE HARNESS (SHORT TO B+)

Disconnect the connectors from the occupant classification ECU and the front seat inner belt assembly RH.
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: for Power seat

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-9 (BSW) - Body ground	Power switch on (IG)	Below 1 V
T10-5 (BGND) - Body ground	Power switch on (IG)	Below 1 V

for Manual seat

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
O4-9 (BSW) - Body ground)	Power switch on (IG)	Below 1 V
O4-5 (BGND) - Body ground	Power switch on (IG)	Below 1 V

Fig 1: Identifying Wire Harness (Short To B+)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Result

RESULT TABLE

Result	Proceed to
NG (for Power seat)	A
NG (for Manual seat)	B
OK	C

A: REPAIR OR REPLACE FRONT SEAT WIRE RH

B: REPAIR OR REPLACE FLOOR WIRE NO. 2

C: Go To Next Step

CHECK WIRE HARNESS (OPEN)

Turn the power switch off.
Disconnect the negative (-) terminal cable from the battery.
Using a service wire, connect terminals 2 and 1 of connector C.
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: for Power seat

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-9 (BSW) - T10-5 (BGND)	Always	Below 1 Ω

for Manual seat

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
O4-9 (BSW) - O4-5 (BGND)	Always	Below 1 Ω

Result

RESULT TABLE

Result	Proceed to
NG (for Power seat)	A
NG (for Manual seat)	B
OK	C

Fig 2: Identifying Wire Harness (Open)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

A: REPAIR OR REPLACE FRONT SEAT WIRE RH

B: REPAIR OR REPLACE FLOOR WIRE NO. 2

C: Go To Next Step

CHECK WIRE HARNESS (SHORT)

Disconnect the service wire from connector C.

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

Standard resistance: for Power seat

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-9(BSW)-T10-5 (BGND)	Always	1 MΩ or Higher

for Manual seat

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
O4-9 (BSW) - O4-5 (BGND)	Always	1 MΩ or Higher

Result

RESULT TABLE

Result	Proceed to
NG (for Power seat)	A
NG (for Manual seat)	B
OK	C

A: REPAIR OR REPLACE FRONT SEAT WIRE RH

Fig 3: Identifying Wire Harness (Short)

B: REPAIR OR REPLACE FLOOR WIRE NO. 2

C: Go To Next Step

CHECK WIRE HARNESS (SHORT TO GROUND)

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

Standard resistance: for Power seat

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester connection	Condition	Specified condition
T10-9 (BSW) -Body ground	Always	1 MΩ or Higher
T10-5 (BGND) - Body ground	Always	1 MΩ or Higher

for Manual seat

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
O4-9 (BSW) - Body ground	Always	1 MΩ or Higher
O4-5 (BGND) - Body ground	Always	1 MΩ or Higher

Result

RESULT TABLE

Result	Proceed to
NG (for Power seat)	A
NG (for Manual seat)	B
OK	C

Fig 4: Identifying Wire Harness (Short To Ground)

A: REPAIR OR REPLACE FRONT SEAT WIRE RH

B: REPAIR OR REPLACE FLOOR WIRE NO. 2

C: Go To Next Step

CHECK DTC
1. Connect the connectors to the occupant classification ECU and the front seat inner belt assembly RH.
2. Connect the negative (-) terminal cable to the battery.
3. Turn the power switch on (IG).
4. Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
5. Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/03-2006/10) ).
6. Turn the power switch off.
7. Turn the power switch on (IG).
8. Check the DTCs (See DTC CHECK/CLEAR ).
  OK: DTC B1771 is not output.
  
  HINT:
  
  Codes other than DTC B1771 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 FRONT SEAT INNER BELT ASSEMBLY RH
1. Turn the power switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Replace the front seat inner belt assembly RH (See REMOVAL (2006/03-2006/10) ).
  HINT:
  
  Perform the inspection using parts from a normal vehicle if possible.
4. Connect the negative (-) terminal cable to the battery.
5. Turn the power switch on (IG).
6. Clear the DTCs stored in the occupant classification ECU (See DTC CHECK/CLEAR ).
7. Clear the DTCs stored in the center airbag sensor assembly (See DTC CHECK/CLEAR (2006/03-2006/10) ).
8. Turn the power switch off.
9. Turn the power switch on (IG).
10. Check the DTCs (See DTC CHECK/CLEAR ).
  OK: DTC B1771 is not output.
  
  HINT:
  
  Codes other than DTC B1771 may be output at this time, but they are not related to this check.
OK: END

NG: Go To Next Step
REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the power switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Replace the occupant classification ECU (See REMOVAL (2006/03-2006/10) ).
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)
NEXT: END