Fuel Display - Inaccurate Readings

GROUP 65
Radio and Accessories



Bulletin Number
65 07 87 (1446)



Montvale, NJ
May 1988
Technical Dept.



This Service Information bulletin supersedes S.I. 65 07 87 (1446) dated August 1987. It updates the coding table.

Please remove and discard S.I. 65 07 87 (1446) dated August 1987 from your S.I. binder.


SUBJECT:
Coding Plug/On-Board Computer II


MODELS:
All so equipped






The coding plug stores important information such as the engine type, fuel injection type, tire size (circumference), fuel tank capacity and fuel tank reserve capacity.

To see if the proper coding plug has been installed without removing the module, turn on the ignition and press the buttons at the same time.





A display similar to this will appear.



Compare the display to the chart on the reverse side of this S.I.

If the customer complains about an inaccurate range display reading, check the reserve capacity calibration as follows:

^ The low fuel level warning light on the fuel gauge must be illuminated (drain fuel from tank or pull level sensor from tank).

^ Press the 1000 and 1 buttons at the same time.





^ Compare the reading in the display to amount listed under reserve capacity for the appropriate model on the chart.

^ If the display is incorrect, remove the plastic plug located next to the 1000 button and adjust the reading by turning the potentiometer with a small screwdriver.

*NOTE:

This procedure must always be performed after replacing an OBC II. module.