W 150 Ramcharger V8-360 5.9L (1991)
Maintenance Required Lamp/Indicator: Service and Repair
On-Board Diagnosis Connector Location
On certain models, this Emission Maintenance Reminder System is incorporated into the engine controller. The controller stores vehicle mileage
into its memory every 8 miles, then at 60,000, 82,500 or 120,000 miles it will illuminate the EMR lamp. When the indicated mileage is reached or
the EMR lamp is on at all times, the following parts must be replaced and the EMR lamp reset.
1. At 60,00 miles, proceed as follows:
a. Replace EGR valve.
b. Clean EGR passage.
c. Replace PCV valve.
2. At 82,500 miles, proceed as follows:
a. Replace oxygen sensor.
3. At 120,000 miles, proceed as follows:
a. Replace EGR valve.
b. Clean EGR passage.
c. Replace PCV valve.
4. On 1990-95 models, after necessary emission maintenance has been performed, connect Diagnosis Read-Out Box II (DRB II) to the on-board
diagnosis connector. See images above.
5. On all models, Follow instructions indicated by DRB II tool.
