Speed Control/Speedometer - Erratic Operation

88ford1

^ SPEED CONTROL - 2.9L EFI - "HUNTING" OR QUITS WORKING - VEHICLES BUILT BEFORE 09/01/87

^ SPEEDOMETER - ERRATIC OPERATION OR WILL NOT WORK - VEHICLES BUILT BEFORE 09/01/87

^ TRIPMINDER - ERRATIC OPERATION - VEHICLES BUILT BEFORE 09/01/87

Article No. 88-1-8

MERKUR: 1988 SCORPIO

ISSUE: Speed control that hunts, or quits working may be caused by the electronic speed sensor located on the extension housing of the transmission. A speedometer that will not operate or operates erratically, or a tripminder that indicates a reading of 99 miles per gallon may also be caused by a bad electronic speed sensor.

ACTION: To correct these conditions, install a new design electronic speed sensor. Refer to the following service procedure.

1. Raise vehicle on hoist.

2. Remove seven (7) heat shield retainers and position heat shield rearward for access to the electronic speed sensor.

3. Remove bolt holding the electronic speed sensor to the transmission extension housing.

4. Remove the electronic speed sensor and gear from transmission.

5. Disconnect wire connector at electronic speed sensor.

FIGURE 3:

6. Connect wire and position new electronic speed sensor, wire retainer, and radio ground strap to transmission extension housing, Figure 3.

7. Install bolt holding electronic speed sensor to transmission extension housing.

8. Position heat shield and install the seven (7) retainers.

9. Lower vehicle.

PART NUMBER PART NAME CLASS

E8RY-9E731-B Electronic Speed Sensor C

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 880108A
TIME: 0.4 Hr. DLR. CODING: Basic Part No. 9E731 - Code: 09