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 |
IG Power Source Circuit
DESCRIPTION
The main power source is supplied to the air conditioning amplifier assembly
when the ignition switch is turned to ON. The power source is used for operating
the air conditioning amplifier assembly, servo motors, etc.
WIRING DIAGRAM
CAUTIO ...
Check Mode Procedure
CHECK MODE PROCEDURE
1. DESCRIPTION
(a) Check mode has a higher sensitivity to malfunctions and can detect malfunctions
that normal mode cannot detect. Check mode can also detect all the malfunctions
that normal mode can detect. In check mode, DTCs are s ...