(i) Turn the engine switch off.
(j) Turn the engine switch on (IG), and wait for at least 10 seconds.
(k) Using the Techstream, check for DTCs of the occupant classification ECU See: Restraints and Safety Systems/Testing and
Inspection/Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1794 is not output.
HINT
Codes other than DTC B1794 may be output at this time, but they are not related to this check.
NG -- REPLACE OCCUPANT CLASSIFICATION ECU
OK -- USE SIMULATION METHOD TO CHECK See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting
4. REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the engine switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
(c) Replace the occupant classification ECU See: Restraints and Safety Systems/Air Bag Systems/Seat Occupant Sensor/Service and
Repair/Occupant Classification ECU/Removal.
NEXT -- Continue to next step.
5. PERFORM ZERO POINT CALIBRATION
(a) Connect the cable to the negative (-) battery terminal.
(b) Connect the Techstream to the DLC3.
(c) Turn the engine switch on (IG).
(d) Using the Techstream, perform the Zero Point Calibration See: Restraints and Safety Systems/Testing and Inspection/Programming
and Relearning.
OK:
"Zero Point Calibration is complete." is displayed.
NEXT -- Continue to next step.
6. PERFORM SENSITIVITY CHECK
(a) Using the Techstream, perform Sensitivity Check See: Restraints and Safety Systems/Testing and Inspection/Programming and
Relearning.
Standard:
27 to 33 kg (59.5 to 72.8 lb)
NEXT -- END
From 08/2009
SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1794: Open in Occupant Classification ECU
Battery Positive Line
B1794 - Open in Occupant Classification ECU Battery Positive Line
DESCRIPTION
DTC B1794 is set when a malfunction is detected in the occupant classification ECU.
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