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Idle Validation Switch Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 431 PID: S230 SPN: 558 FMI: 2/2 LAMP: Yellow SRT: |
No voltage detected simultaneously on both the idle validation off-idle and on-idle signal pins. |
None on performance. |
 Idle Validation Switch Circuit
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Circuit Description
The idle validation switch is used by the electronic control module (ECM) to indicate when the accelerator pedal is released (on-idle) or depressed (off-idle). The switch is adjusted at the factory to switch from on-idle to off-idle at the correct accelerator pedal position.
Component Location
The integrated sensor switch (ISS) is located on the accelerator pedal assembly.
Shop Talk
- This fault code is usually caused by a loose connection, uncalibrated accelerator pedal, or miswired idle validation switch.
- The integrated sensor switch (ISS) has a different idle validation switch (IVS) resistance specification (125 ohms) as compared to nonintegrated sensor switch (NISS) (10 ohms).
Refer to Troubleshooting Fault Code t05-431iss.
Last Modified: 26-Oct-2010
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