Cherokee 2WD L4-150 2.5L VIN H TBI (1988)
FIGURE 3
FIGURE 4
2.
Disconnect the EEC Connector and install the idle speed jumper harness
(B)
between the EEC harness connector. Figure 3 shows the Wrangler with idle jumper harness installed. Figure 4 shows
the Cherokee, Wagoneer, and Comanche with idle jumper harness installed.
3.
Recheck the idle speed using a tachometer and verify that it is 950 +/- 50 RPM.
4.
Remove the tachometer.
NOTE:
THE IDLE SPEED JUMPER HARNESS HAS THE SAME EFFECT ON VEHICLES EQUIPPED WITH
OR WITHOUT AIR CONDITIONING. THE JUMPER HARNESS CAUSES AN INCREASE IN IDLE
SPEED BY SENDING A STEP-UP SIGNAL TO THE ECU THAT SIMULATES FULL-TIME AIR
CONDITIONING OPERATION. THE LOW IDLE SPEED JUMPER HARNESS SHOULD BE
REMOVED FROM THE EEC HARNESS PRIOR TO TESTING THE VEHICLE WITH THE DRB II OR
THE MS 1700 TESTER TO PREVENT INVALID TESTS.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No.
08-90-65-91 . . . . . . . . . . 0.3 Hrs.
FAILURE CODE:
15 - Calibration
