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Engine Speed Sensor Supply Voltage Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 284 PID: S221 SPN: 1043 FMI: 4/4 LAMP: Amber SRT: |
Engine Speed Sensor Supply Voltage Circuit – shorted low. Incorrect voltage detected on the ECM voltage supply line to the engine speed sensor. |
Possible hard starting and rough running. |
 Engine Speed Sensor Supply Voltage Circuit
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Circuit Description
The ECM supplies the engine speed sensor with +5 VDC.
Component Location
The engine speed sensor is located in the lower portion of the front cover on the intake side of the engine. Refer to Section E for a detailed component location view.
Shop Talk
The ECM monitors the voltage level on the engine speed sensor +5 volt supply circuit. If voltage falls below a calibratible limit then this fault is recorded.
Possible causes of this fault code are a short circuit to ground in the engine harness, sensor, or ECM.
Refer to Troubleshooting Fault Code t05-284
Last Modified: 01-Sep-2010
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