Auxiliary Alternate Torque Validation Switch – Data Erratic, Intermittent, or Incorrect
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Overview
CODE | REASON | EFFECT |
Fault Code: 528 PID: P093 SPN: 093 FMI: 2 LAMP: Amber SRT: |
Auxiliary Alternate Torque Validation Switch – Data Erratic, Intermittent, or Incorrect. An error has been detected in the alternate torque switch circuit. |
Torque curve setting defaults to default curve. |
![]() Alternate Torque Circuit
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Circuit Description
The torque curve switch circuit allows the operator to select from up to three preprogrammed torque curves using a two- or three-position switch, depending on which the original equipment manufacturer (OEM) has provided.
Component Location
The location of the torque curve switch circuit varies with each OEM and equipment model. Refer to the OEM manual.
Shop Talk
The switch can be monitored for proper operation in INSITE™ electronic service tool. If the switch is changing state correctly on the service tool, then the problem does not lie in the switch circuit. The three position-switch has three states:
- Position 1 – open
- Position 2 – closed
- Position 3 – 1500 ohm resistance
The two position-switch has two states:
- Position 1 – open
- Position 2 – closed
Refer to Troubleshooting Fault Code t05-528