Fuel - Metering Valve Sensor Adjusting Harness
Number 85-6(Diesel)-4 Date 2/85Subject: METERING VALVE SENSOR ADJUSTING HARNESS
ALL 1985 MODELS WITH DIESEL ENGINES
The Metering Valve Sensor adjusting harness, J-34678, has a MVS voltage table printed on the back of the box. The V-REF voltage readings are from 4.5 to 5.5. This tool was originally developed for use on 1984 model California diesels, which had reference voltages from 4.5 to 5.5. 1985 models, however, may have reference voltages in a range from 4.0 to 5.5. Refer to the chassis service manual for information regarding reference voltage readings in the 4.0 to 4.5 range rather than replace the ECM for a too low reference voltage.
The idle speed specifications shown on the label apply to the 1984 models only. Refer to the chassis service manual for 1985 idle speed specifications.