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Home >> Toyota >> 2017 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Body & Frame >> Exterior/Interior Trim >> Automatic Running Board System - Diagnostic Codes & Circuit Tests >> Automatic Running Board System >> DTC 51: Side Auto Step LH Stowing Timeout; DTC 52: Side Auto Step LH Deploying Timeout; DTC 53: Side Auto Step RH Stowing Timeout; DTC 54: Side Auto Step RH Deploying Timeout; DTC 55: Motor LH Spining Freely; DTC 56: Motor RH Spining Freely [08/2015 - ] >> Description
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DTC 51: Side Auto Step LH Stowing Timeout; DTC 52: Side Auto Step LH Deploying Timeout; DTC 53: Side Auto Step RH Stowing Timeout; DTC 54: Side Auto Step RH Deploying Timeout; DTC 55: Motor LH Spining Freely; DTC 56: Motor RH Spining Freely [08/2015 - ]: 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.
  • Power lift step assembly
  • Side auto step motor assembly
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.