Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC

Turn the ignition switch ON, and wait for at least 10 seconds.

Check the DTCs (see DTC CHECK / CLEAR ).

Result

RESULT CHART

Result	Proceed to
DTC B1795 Is output.	A
DTC B1771 and B1795 are output.	B

HINT:

DTCs other than DTC B1771 and B1795 may be output at this time, but they are not related to this check.

B: GO TO DTC B1771

A: GO to Next Step

CHECK FUSE (ECU-B)
1. Check the ECU-B fuse from the instrument panel junction block.
2. Measure the resistance of the fuse.
  Standard resistance:
  
  Below 1 Ω
NG: REPLACE FUSE

OK: GO to Next Step

CHECK WIRE HARNESS (SOURCE VOLTAGE)

Turn the ignition switch OFF.
Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
Disconnect the No. 2 floor wire connector from the occupant classification ECU.
Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

Measure the voltage of the wire harness side connector.

Fig 1: Checking Wire Harness (Source Voltage)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard voltage

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
L1-1 (+B) - Body ground	Always	10 to 14 V
L1-7 (IG) - Body ground	Ignition switch ON	10 to 14 V

Turn the ignition switch OFF.

Measure the resistance of the wire harness side connector.

Standard resistance

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Specified Condition
L1-3 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE WIRE HARNESS

OK: GO to Next Step

REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the ignition switch OFF.
2. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
3. Replace the occupant classification ECU (see OCCUPANT CLASSIFICATION ECU ).
PERFORM ZERO POINT CALIBRATION
1. Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
2. Connect the intelligent tester to the DLC3.
3. Turn the ignition switch ON.
4. Using the intelligent tester, perform the zero point calibration (see INITIALIZATION ).
OK: COMPLETED is displayed.
PERFORM SENSITIVITY CHECK
1. Using the intelligent tester, perform the sensitivity check (see INITIALIZATION ).
  Standard value:
  
  27 to 33 kg (59.52 to 72.75 lb)
NEXT: END