Test D: the Retractable Running Board Does Not Operate Correctly - DTC B1166, B1167, B1168, B1173, B1178, B1175, B116B, B116D,

PINPOINT TEST D: THE RETRACTABLE RUNNING BOARD DOES NOT OPERATE CORRECTLY - DTC B1166, B1167, B1168, B1173, B1178, B1175, B116B, B116D, B116C OR B116E

D1-D2:

D2-D3:

D4-D6:

Normal Operation
During power running board (PRB) deployment, the PRB module supplies power to the PRB motor through circuit CPR41 (BU/WH) (LH) or CPR44 (BN/WH) (RH) and ground through circuit CPR42 (WH) (LH) or CPR45 (VT/GY) (RH). The PRB module stows the PRB by supplying power to the PRB motor through circuit CPR42 (WH) (LH) or CPR45 (VT/GY) (RH) and ground through circuit CPR41 (BU/WH) (LH) or CPR44 (BN/WH) (RH). The PRB module provides a regulated 10 volt power supply to the Hall-effect sensor (internal to the PRB motor) through circuit CPR47 (GY/BN). The Hall-effect ground is provided by the PRB module through circuit RPR47 (BU/GN). The PRB module monitors the PRB Hall-effect signal through circuit VPR43 (GY/BU) (LH) or VPR46 (GY/OG) (RH). If the PRB module does not receive any signal from the Hall-effect sensor during operation, the PRB will stop.

Possible Causes
- Open in circuit CPR47 (GY/BN), RPR47 (BU/GN), VPR43 (GY/BU), VPR46 (GY/OG), CPR41 (BU/WH), CPR44 (BN/WH), CPR42 (WH) or CPR45 (VT/GY)
- Short to ground in circuit VPR43 (GY/BU), VPR46 (GY/OG), CPR44 (BN/WH) or CPR45 (VT/GY)
- Short to battery in circuit VPR43 (GY/BU), VPR46 (GY/OG), CPR41 (BU/WH), CPR44 (BN/WH), CPR42 (WH) or CPR45 (VT/GY)
- Short circuit between CPR41 (BU/WH) and CPR42 (WH) or CPR44 (BN/WH) and CPR45 (VT/GY)
- LH or RH PRB motor assembly
- PRB module