Repair Procedure
Automatic Transaxle - 1.6 Liter EngineInstall tachometer and prepare vehicle for the following idle setting conditions:
^ Bring engine to full operating temperature..
^ All lights and accessories off.
^ Transaxle in neutral.
^ Parking brake applied.
^ Radiator fan off (disconnect fan if necessary).
FIGURE 1:
FIGURE 3:
1. Check engine number on cylinder block (Figure 1). If number is after G32B-2CU6768, proceed to Step 3. If number is before G32B-2CU6768, turn EGR vacuum adjusting screw (Figure 2) one turn counterclockwise.
2. After adjustment is made, apply a daub of white paint over screw to relock position.
FIGURE 2:
3. Be certain curb idle speed is set to emissions label specifications. Adjust if necessary. (Idle set screw location - Figure 2.)
4. Turn air conditioning on:
^ Set air selector lever to "inside" position.
^ Set blower motor speed on "low".
^ Push in A/C button.
5. Using the throttle opener adjusting screw (Figure 2), adjust idle speed to 850 + or - 50 rpm.
^ Air compressor must be cycled "on".
^ Radiator fan "off" (disconnect if necessary).
^ If air compressor cycles too fast, use highest blower motor setting and adjust idle to 800 + or - 50.
6. Raise engine speed to 2000-3000 rpm and hold for 15 seconds.
7. Slowly release throttle and check to see if engine idle is at 850 + or - 50 with blower motor on low or 800 + or - 50 with blower on high. If not, repeat Steps 6 and 7.
FIGURE 3:
8. If engine speed still fails to fall within the above specifications, install Sub-Harness Assembly, PN MB338249 (as shown in Figure 3), and repeat Steps 3 through 7.
9. Reconnect radiator fan if disconnected.
FIGURE 6:
10. Type the following information on the Authorized Modification Label PN 4275086 (see Figure 6).
Upper Section
Revised Throttle Opener Adjustment to 850 + or - 50 RPM With Blower Motor on "Low".
Lower Section
^ Change Authority - TSB #14-33-83.
^ Dealer Code - your dealer code.
^ Date - date this service is performed.
FIGURE 3:
Manual Transaxle - 1.4 and 1.6 Liter Engines
Locate vehicle safety certification label mounted on driver side body door opening below striker plate. All vehicles with date code before 1-83, install Sub-Harness Assembly, PN MB338249, as shown in Figure 3.
Install tachometer and prepare vehicle for the following idle setting conditions:
^ Bring engine to full operating temperature.
^ All lights and accessories off.
^ Transaxle in neutral.
^ Parking brake applied.
^ Radiator fan off (disconnect if necessary).
FIGURE 4:
FIGURE 5:
Please note as shown in Figures 4 and 5, that there are two throttle opener adjusting screws. Figure 4 shows the primary adjusting screw. Figure 5 shows the secondary adjustment screw.
1. Be certain curb idle is set to emissions label specifications. Adjust if necessary. (Idle set screw location - Figure 4.)
2. Turn primary adjusting screw (Figure 4) to its full "in" position. Then back off five full turns.
3. Tighten secondary throttle opener adjusting screw (Figure 5) until engine speed is above curb idle specification.
4. Back off secondary adjusting screw to curb idle specification. Then back off additional 1/4 turn.
5. Turn air conditioning on:
^ Set air selector lever to "inside" position.
^ Set blower motor speed on "low".
^ Push in A/C button.
6. Using primary throttle opener adjusting screw (Figure 4), set engine speed to 850 + or - 50.
7. Reconnect radiator fan if disconnected.
8. Turn on and off air conditioning switch several times to check up and down operation of throttle opener.
NOTE: WHEN A/C CYCLES OFF OR WHEN ANY ELECTRICAL DEVICE IS OPERATED, THE THROTTLE OPENER SYSTEM WILL KEEP ENGINE SPEED AT APPROXIMATELY 1100-1200 RPM.
FIGURE 6:
9. Type the following information on the Authorized Modification Label PN 4275086 (see Figure 6).
Upper Section
Revised Throttle Opener Adjustment to 850 + or - 50 RPM With Blower Motor on "Low".
Lower Section
^ Change Authority - TSB #14-33-83.
^ Dealer Code - your dealer code.
^ Date - date this service is performed.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No. 14-30-07-93 . . . . . . . . . . . . . . . . . . . . . 0.4 Hrs.
FAILURE CODE: RO - Driveability