DESCRIPTION
The occupant classification system detects the front passenger seat condition. It then displays the instrument panel passenger airbag assembly and front seat cushion airbag assembly RH condition (activated/not activated) using the passenger airbag ON/OFF indicator.
HINT:
Approximately 6 seconds after the ignition switch is turned ON, the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the following conditions.
Front Passenger Seat Condition |
Passenger Airbag ON/OFF Indicator |
SRS Warning Light |
|
---|---|---|---|
ON Indicator |
OFF Indicator |
||
Vacant |
OFF |
ON |
OFF |
Adult*1 is seated |
ON |
OFF |
OFF |
Child*2 is seated |
ON or OFF*2 |
OFF or ON*2 |
OFF |
Child restraint system is installed |
OFF |
ON |
OFF |
Occupant classification system failure |
OFF |
ON |
ON |
CAUTION / NOTICE / HINT
NOTICE:
Click here
PROCEDURE
1. |
CHECK SRS WARNING LIGHT |
(a) Turn the ignition switch to ON, and check the SRS warning light condition.
OK:
After the primary check period, the SRS warning light goes off.
HINT:
The primary check is performed for approximately 6 seconds after the ignition switch is turned ON.
NG | ![]() |
GO TO AIRBAG SYSTEM |
|
2. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Tester Display |
---|
Zero Point Calibration |
OK:
"Zero Point Calibration is complete." is displayed.
OK | ![]() |
END |
|
3. |
RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT |
(a) Loosen the 4 installation bolts of the front seat assembly RH.
(b) Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.
Click here
|
4. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Tester Display |
---|
Zero Point Calibration |
OK:
"Zero Point Calibration is complete." is displayed.
OK | ![]() |
END |
|
5. |
READ VALUE USING TECHSTREAM |
(a) Turn the ignition switch off.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Body Electrical / Occupant Detection / Data List.
(f) Read the Data List according to the display on the Techstream.
Body Electrical > Occupant Detection > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
Passenger Buckle SW |
Passenger side buckle switch |
NG, Set or Unset |
Set: Front passenger seat belt is fastened Unset: Front passenger seat belt is not fastened |
"NG" will be displayed immediately after the ignition switch is turned on. |
Tester Display |
---|
Passenger Buckle SW |
OK:
The Techstream display changes correctly in accordance with the operation of the passenger side buckle switch.
NG | ![]() |
GO TO STEP 9 |
|
6. |
CHECK CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Disconnect the connectors from the occupant detection ECU, front in weight detection sensor sub-assembly and rear in weight detection sensor sub-assembly.
(d) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
NG | ![]() |
REPLACE FRONT SEAT WIRE RH |
|
7. |
REPLACE OCCUPANT DETECTION ECU |
(a) Connect the connectors to the front in weight detection sensor sub-assembly and rear in weight detection sensor sub-assembly.
(b) Replace the occupant detection ECU.
Click here
(c) Connect the cable to the negative (-) battery terminal.
|
8. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Tester Display |
---|
Zero Point Calibration |
NEXT | ![]() |
END |
9. |
CHECK CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Disconnect the connectors from the occupant detection ECU and front seat inner belt assembly RH.
(d) Check that the terminals of the connectors are not deformed or damaged.
OK:
The terminals are not deformed or damaged.
NG | ![]() |
REPLACE FRONT SEAT WIRE RH |
|
10. |
REPLACE FRONT SEAT INNER BELT ASSEMBLY RH |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Replace the front seat inner belt assembly RH.
Click here
(d) Connect the cable to the negative (-) battery terminal.
|
11. |
PERFORM ZERO POINT CALIBRATION |
(a) Using the Techstream, perform Zero Point Calibration.
Click here
Tester Display |
---|
Zero Point Calibration |
NEXT | ![]() |
END |
Toyota CH-R Service Manual > Electric Parking Brake Actuator: Precaution
PRECAUTION
IGNITION SWITCH EXPRESSIONS
(a) The type of ignition switch used on this model differs depending on the specifications
of the vehicle. The expressions listed in the table below are used in this section.
Expression
Ignition Switch (Position)
Engine Swi ...
Toyota CH-R Service Manual > Electric Parking Brake Actuator: Installation
INSTALLATION
CAUTION / NOTICE / HINT
HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE
1. INSTALL PARKING BRAKE ACTUATOR ASSEMBLY
(a) Apply a light coat of lithium soap base glycol grease to a new O-ring.
(b) Inst ...