Exhibit 3
Exhibit 3
Emissions Recall 89E78 Repair Code "B"
HARDSTOP (THROTTLE STOP ADJUSTING SCREW) RPM SETTING PROCEDURE
NOTE: THIS PROCEDURE IS NEW AND REPLACES ALL PRIOR PROCEDURES.
REMINDER: Battery must be disconnected for 5 minutes before proceeding.
1. ^ Engine "OFF"
^ Remove the air induction tube (flex tube) completely.
2. Retract the (SC Motor ^ In the engine compartment, find the self-test connector and self-test input (STI) connector.
^ Connect a jumper wire between self-test input connector and signal return pin on the self-test connector.
HARDSTOP (THROTTLE STOP ADJUSTING SCREW)
Exhibit 3
RPM SETTING PROCEDURE (CONT.)
^ Turn the ignition key to "RUN" position. DO NOT START THE ENGINE. Emissions Recall 89E78
^ The ISC plunger will retract in 5-15 seconds. Repair Code "B"
^ Disconnect the ISC motor from the wire harness.
^ Return the ignition key to the "OFF" position.
^ Then remove the jumper wire.
^ Turn the engine "ON".
^ Warm up the engine to Normal Operating Temperature for 2-3 minutes.
^ Turn all accessories off, check the hardstop RPM (cooling fan off) in Neutral (MTX) or Drive (ATX) for proper RPM's and the TV linkage adjustment (ATX), see chart.
Applications Hardstop Idle EEC Controlled Idle
Manual Transmission 725 +/- 25 775 +/- 25
Automatic Transmission 650 +/- 25 700 +/- 25
^ If TV linkage, on automatic transmission equipped vehicles, is out of adjustment, adjust using the following procedure before adjusting Hard Stop-Idle.
^ Loosen the bolt on the sliding trunnion block, on the TV control rod assembly, one turn minimum.
^ Remove any corrosion from the control rod and free-up the trunnion block so that it slides freely on the the control rod.
^ With trunnion block loosened, rotate the trans-axle control lever up using one finger and a light force, 4.5N (approximately 1 pound), to ensure that the TV control lever is against its internal idle stop. Without relaxing the force on the TV control lever, tighten the bolt on the trunnion block to 9-14 N-m. (7-11 lb. ft.) as shown below.
^ Turn the throttle stop adjusting screw for hardstop adjustment.
^ Turn the engine "OFF".
^ Reconnect the ISC connector.
^ Reconnect the air induction tube (flex tube) completely.
3. Perform the EEC-IV Controlled Idle Learning Procedure
^ Turn the engine "ON".
^ Turn all accessories "OFF" [With the engine at normal operating temperatures and the transmission in Neutral (MTX) or Drive (ATX), idle the engine for 2-3 minutes.]
^ Turn the Air Conditioning "ON" (if applicable) and idle the engine for 2-3 minutes.
^ The controlled idle RPM should be within specifications with air conditioning "OFF" (see chart Exhibit 3, Page 2 of 3).
^ Place a small quantity of room temperature vulcanizing (RTV) compound in the idle screw adjusting hole of the throttle body. This space was previously covered by the tamper resistant cap.
NOTE: Idle speeds are controlled by EEC-IV processor and idle speed control motor. If the ISC motor system is operating properly, these speeds are fixed and can not be changed by traditional adjustment techniques.
^ Refer to the Modification Procedure Summary (Attachment I, Page 1).