 |
|
Idle Validation Switch Circuit
|
Overview
| CODE | REASON | EFFECT |
| Fault Code: 551 PID: S230 SPN: 558 FMI: 4 LAMP: Yellow SRT: |
Idle validation signals on pins indicate no voltage detected on either pin. |
Engine will possibly only idle. |
 Idle Validation Switch Circuit
|
Circuit Description
The idle validation switch 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 by the accelerator pedal manufacturers to switch from on-idle to off-idle at the correct accelerator pedal position.
Component Location
The idle validation switch 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. A bad ground on pin A (or pin 1) of the idle validation switch can also cause this fault.
Refer to Troubleshooting Fault Code t05-551
;){kind=link}
;){kind=link}