2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) B CODE Page 1610

SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: B1796: Sleep Operation Failure of Occupant

Classification ECU

B1796 - Sleep Operation Failure of Occupant Classification ECU

DESCRIPTION

In sleep mode, the occupant classification ECU reads the condition of each sensor while the engine switch is off.

In this mode, if occupant classification ECU detects an internal malfunction, DTC B1796 is stored.

HINT

When DTC B1650/32 is detected as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant

classification ECU. When DTC B1796 is output, perform troubleshooting for the DTC.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Turn the engine switch on (IG).

(b) Clear the DTCs stored in the occupant classification ECU See: Restraints and Safety Systems/Testing and Inspection/Reading and

Clearing Diagnostic Trouble Codes.

(c) Clear the DTCs stored in the center airbag sensor assembly See: Restraints and Safety Systems/Air Bag Systems/Testing and

Inspection/Reading and Clearing Diagnostic Trouble Codes/DTC Check / Clear.

(d) Turn the engine switch off, and wait for at least 10 seconds.

(e) Turn the engine switch on (IG).

(f) Check for DTCs See: Restraints and Safety Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC B1796 is not output.

HINT

Codes other than DTC B1796 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

2. 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.

3. 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).