DESCRIPTION
During sleep mode, the occupant classification ECU monitors the condition of each sensor while the ignition switch is off. In this mode, if the occupant classification ECU detects an internal malfunction, DTC B1796 is stored.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B1796 |
Occupant classification ECU malfunction. |
Occupant classification ECU |
HINT:
PROCEDURE
1. |
CHECK FOR DTC |
(a) Turn the ignition switch to ON, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory (See page
).
HINT:
(c) Turn the ignition switch off, and wait for at least 10 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Using the Techstream, check for DTCs of the occupant classification ECU (See
page ).
OK:
DTC B1796 is not output.
HINT:
DTCs other than DTC B1796 may be output at this time, but they are not related to this check.
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
|
2. |
REPLACE OCCUPANT CLASSIFICATION ECU |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU (See page
).
HINT:
Perform the inspection using parts from a normal vehicle when possible.
|
3. |
PERFORM ZERO POINT CALIBRATION |
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(b) Turn the ignition switch to ON, and wait for at least 60 seconds.
(c) Using the Techstream, perform the zero point calibration (See page
).
OK:
"Zero Point Calibration is complete." is displayed.
|
4. |
PERFORM SENSITIVITY CHECK |
(a) Using the Techstream, perform the sensitivity check (See page
).
Standard range:
27 to 33 kg (59.5 to 72.8 lb)
NEXT | ![]() |
END |
Operation Check
OPERATION CHECK
1. CHECK INITIAL CHECK FUNCTION
(a) Check the initial check function for the buzzer.
(1) When the back sonar or clearance sonar switch assembly is turned on, check
that the following occurs: 1) after 0.2 seconds, the buzzer sounds for ap ...
Park / Neutral Position Switch Circuit
DESCRIPTION
This circuit sends the park/neutral position switch assembly signals to the clearance
warning ECU assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the followin ...