DESCRIPTION
When fully deploying or stowing the automatic running board takes more than 4 seconds, or when the side auto step motor hall sensor pulse signal exceeds the maximum pulse count, the side auto step ECU halts the operation of the automatic running board.
DTC No. |
DTC Detection Condition |
Trouble Area |
---|---|---|
51 |
Side auto step motor LH operates for 4 seconds or more. |
|
52 |
||
53 |
Side auto step motor RH operates for 4 seconds or more. |
|
54 |
||
55 |
The side auto step motor LH hall sensor pulse count is more than the maximum number of pulses per full travel. |
|
56 |
The side auto step motor RH hall sensor pulse count is more than the maximum number of pulses per full travel. |
PROCEDURE
1. |
CHECK AUTOMATIC RUNNING BOARD OPERATION |
(a) Confirm the operation of the automatic running board and proceed to the steps indicated below.
Result |
Proceed to |
---|---|
The side auto step motor turns over at high speed for 4 seconds and then stops. (The automatic running board does note move) |
A |
The side auto step motor turns over at high speed for 4 seconds and then stops. (The automatic running board is stowed or deployed) |
B |
The side auto step motor turns over at low speed for 4 seconds and then stops. (The automatic running board stops partway during stowing or deploying operation) |
C |
B |
REPLACE SIDE AUTO STEP MOTOR ASSEMBLY |
C |
GO TO STEP 3 |
|
2. |
INSPECT POWER LIFT STEP ASSEMBLY |
(a) Check that the links of the power lift step assembly are properly installed.
(b) Check that the links of the power lift step assembly are not damaged.
OK:
Links of the power lift step assembly are properly installed.
Links of the power lift step assembly are not damaged.
OK |
REPLACE SIDE AUTO STEP MOTOR ASSEMBLY |
NG |
REPLACE POWER LIFT STEP ASSEMBLY |
3. |
INSPECT POWER LIFT STEP ASSEMBLY |
(a) Check that the links of the power lift step assembly are properly installed.
(b) Check that the links of the power lift step assembly are not damaged.
(c) Check that there is no dirt or foreign matter jamming the power lift step assembly links.
HINT:
OK:
Links of the power lift step assembly are properly installed.
Links of the power lift step assembly are not damaged.
There is no dirt or foreign matter jamming the moving sections of the power lift step assembly links.
OK |
REPLACE SIDE AUTO STEP MOTOR ASSEMBLY |
NG |
REPLACE POWER LIFT STEP ASSEMBLY |
Air Inlet Damper Control Servo Motor Circuit (B1442/42)
DESCRIPTION
The recirculation damper servo sub-assembly sends pulse signals to inform the
No. 1 air conditioning amplifier assembly of the damper position. The No. 1 air
conditioning amplifier assembly activates the motor (normal or reverse) based on
th ...
Short to GND in Hall Effect Sensor Power Circuit (31)
DESCRIPTION
When there is a short to GND in the side auto step motor hall sensor power circuit,
the side auto step controller ECU assembly does not operate the automatic running
board.
DTC No.
Detection Condition
Trouble ...