DESCRIPTION DTC B1787 is stored when the occupant detection ECU receives a collision detection signal sent by the rear occupant classification sensor LH in the case of an accident. DTC B1787 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident did not occur. If the vehicle was not in a collision, but the occupant detection ECU receives a collision detection signal and stores DTC B1787, the DTC can be cleared by performing zero point calibration. Therefore, if DTC B1787 is output, first perform zero point calibration.
CAUTION / NOTICE / HINT NOTICE:
HINT: When DTC B165A is stored as a result of troubleshooting for the airbag system, check the DTCs stored in the occupant detection ECU. When DTC B1787 is output, perform troubleshooting for this DTC first. PROCEDURE
(a) Using the Techstream, perform Zero Point Calibration. Click here OK: "Zero Point Calibration is complete." is displayed.
(a) Turn the engine switch on (IG), and wait for at least 60 seconds. (b) Clear the DTCs stored in the occupant detection ECU. Body Electrical > Occupant Detection > Clear DTCs(c) Clear the DTCs stored in the airbag ECU assembly. Body Electrical > SRS Airbag > Clear DTCs(d) Turn the engine switch off. (e) Turn the engine switch on (IG), and wait for at least 10 seconds. (f) Check for DTCs. Body Electrical > Occupant Detection > Trouble CodesOK: DTC B1787 is not output. HINT: Codes other than DTC B1787 may be output at this time, but they are not related to this check. (g) Turn the engine switch off.
(a) Turn the engine switch off. (b) Disconnect the cable from the negative (-) battery terminal. (c) Replace the separate type front seat cushion spring assembly RH. Click here
(d) Connect the cable to the negative (-) battery terminal.
(a) Using the Techstream, perform Zero Point Calibration. Click here
(a) Turn the engine switch off. (b) Disconnect the cable from the negative (-) battery terminal. (c) Replace the separate type front seat cushion spring assembly RH. Click here
(d) Connect the cable to the negative (-) battery terminal.
(a) Using the Techstream, perform Zero Point Calibration. Click here
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Pre-collision System(for Hv Model): Heater Circuit (C1AAE)
DESCRIPTION If the forward recognition camera detects a malfunction in the forward recognition with heater hood sub-assembly circuit, it will output a malfunction signal to the driving support ECU assembly via CAN communication and this DTC will be stored. DTC No. Detection Item DTC Detection Condit ...
