Toyota Tacoma 2015-2018 Service Manual: Occupant Classification ECU Malfunction (B1795)

DESCRIPTION

DTC B1795 is set when a malfunction is detected in the occupant detection ECU.

Troubleshoot DTC B1771 first when both DTCs B1771 and B1795 are present.

PROCEDURE

(a) Turn the ignition switch to the ON position.

(b) Clear any DTCs stored in the memory (See page ).

(c) Turn the ignition switch to the LOCK position, and wait for at least 10 seconds.

(d) Turn the ignition switch to the ON position.

(e) Using the Techstream, check for DTCs of the occupant detection ECU (See page ).

OK:

DTC B1795 is not output.

HINT:

DTCs other than B1795 may be output at this time, but they are not related to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

(a) Turn the ignition switch to the LOCK position.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Replace the occupant detection ECU (See page ).

HINT:

Perform the inspection using parts from a normal vehicle when possible.

NEXT

(a) Connect the negative (-) terminal cable to the battery.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to the ON position.

(d) Using the Techstream, perform the zero point calibration (See page ).

OK:

"Zero Point Calibration is complete." is displayed on the Techstream.

NEXT

(a) Using the Techstream, perform the sensitivity check (See page ).

Standard :

Standard value: 27 to 33 kg (59.52 to 72.75 lb)

NEXT

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