Inspection Procedure

NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.

CHECK FOR DTC
1. Turn the engine 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 (see DTC CHECK/CLEAR ).
4. Turn the engine switch off.
5. Turn the engine switch on (IG), and wait for at least 10 seconds.
6. Check for the DTCs (see DTC CHECK/CLEAR ).
  OK:
  
  DTC B1797 is not output.
  
  HINT:
  
  Codes other than DTC B1797 may be output at this time, but they are not related to this check.
  
  NG: Go to step 2
  
  OK: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

READ VALUE USING TECHSTREAM (SPECIFIED CONDITION FOR ZERO POINT CALIBRATION)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).

Using the Techstream, read the "Data List" (see DATA LIST/ACTIVE TEST ).

Occupant Detection:

OCCUPANT DETECTION - DATA LIST

Tester Display	Measurement Item/ Range	Normal Condition	Specified Condition for Zero Point Calibration	Diagnostic Note
RE Press	Pressure sensor output/Min.: 0, Max.: 255	0 to 210 (reference value)	0 to 2	-
Themi Temp	Thermistor temperature output/Min.: -40°C (-40°F), Max.: 90°C (194°F)	-40 to 85°C (-40 to 185°F)	3 to 40°C (36 to 104°F)	If value is outside range of Specified Condition for Zero Point Calibration, check whether any objects are placed on seat cushion and that seat cushion is fitted correctly
#Present Codes	Number of present trouble codes/Min.: 0, Max.: 255	0	0	-
#Past Codes	Number of past trouble codes/Min.: 0, Max.: 255	0	0	-

Result

RESULT CHART

Result	Proceed to
All items correspond to range of specified condition for zero point calibration	A
"Themi Temp" does not correspond to range of specified condition for zero point calibration	B

B: Go to step 5

A: Go to next step

PERFORM ZERO POINT CALIBRATION
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform zero point calibration (see INITIALIZATION ).
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Clear the DTCs stored in the memory (see DTC CHECK/CLEAR ).
  HINT:
  
  If the DTCs are not cleared at this time, past DTCs will remain.
CHECK FOR DTC
1. Turn the engine 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 (see DTC CHECK/CLEAR ).
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Check for the DTCs (see DTC CHECK/CLEAR ).
  OK:
  
  DTC B1797 is not output.
  
  HINT:
  
  Codes other than DTC B1797 may be output at this time, but they are not related to this check.
  
  NG: Go to step 5
  
  OK: END
REPLACE FRONT SEAT SET (OCCUPANT DETECTION SENSOR)
1. Turn the engine switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the front seat set (with occupant classification ECU and occupant detection sensor) (see DISASSEMBLY ).
4. Connect the negative (-) terminal cable to the battery.
5. Turn the engine 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 (see DTC CHECK/CLEAR ).
PERFORM ZERO POINT CALIBRATION
1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform zero point calibration (see INITIALIZATION ).
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Clear the DTCs stored in the occupant classification ECU (see DTC CHECK/CLEAR ).
  HINT:
  
  If the DTCs are not cleared at this time, past DTCs will remain.
PERFORM SENSITIVITY CHECK
1. Perform the sensitivity check (see INITIALIZATION ).
  NEXT: END