DDEC III/IV Single ECM Troubleshooting

Section 18.1 Description of Flash Code 18

Section 18.1
Description of Flash Code 18

Flash Code 18 indicates that the Throttle Valve Plate Input Voltage has dropped below the 5% sensor supply voltage (normally < 0.25 volts). Typically, the problem is an open signal or an open sensor supply; refer to "18.3 Troubleshooting Flash Code 18, Throttle Valve Plate Input Voltage" . This code also indicates that the voltage seen at the ECM for the relative humidity sensor signal wire was below programmed limits; refer to "18.4 Troubleshooting Flash Code 18, Relative Humidity Sensor Circuit Failed Low" . ‪


DDEC III/IV Single ECM Troubleshooting Guide - 6SE497
Generated on 10-13-2008

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