Powertrain Management: Adjustments

NOTE: Prior to beginning any diagnostic strategies, all basic engine adjustments should be verified and corrected as needed.

SPECIAL SERVICE TOOLS (SST)





ADJUSTMENT PROCEDURES
Preparation:
1. Warm up the engine to normal operating temperature.
2. Shift the transmission into P position.
3. Turn off all loads.
- Headlight
- Blower motor
- Rear window defroster
- Power steering




4. Connect the SST-(NGS) to the data link connector 2 located under the driver side dashboard and select the "PID/DATA MONITOR AND RECORD" function.
5. Select "RPM" on the NGS display.

Ignition Timing:
1. Perform "Preparation" (refer to above)
2. Connect a timing light to the high-tension lead No.1.




3. Connect the SST-(System Selector) to the data link connector.
4. Set switch (A) to position 1.
5. Set the test switch to SELF TEST.
6. Verify that the idle speed is with in the specified range; if not, adjust it.

Specification Range: 500 - 900 RPM





7. Verify that the timing mark (yellow) is within the specification.

Specification: 10 - 12° (11 ± 1°) BTDC




8. If not as specified, loosen the distributor lock bolts and turn the distributor to make the adjustment.
9. Tighten the distributor lock bolts to the specified torque.

Tightening Torque: 19 - 25 Nm (14 - 18 ft.lb.)

10. Disconnect the SST-(System Selector).
11. Verify that the timing mark (yellow) is within the specified range.

Specification Range: 2° ATDC to 34° BTDC

Idle Speed:
1. Perform "Preparation".
2. Connect the SST-(System Selector) to the data link connector.
3. Set switch A to position 1.
4. Set the test switch to SELF TEST
5. Verify that the idle speed is within the specification.

Specification: 760 - 800 (780 ± 20) RPM

CAUTION:
- The throttle adjusting screw is set at the factory and must not be adjusted.
- Any adjustment will negatively effect the engine performance.




6. If not within the specification, adjust the idle speed by turning the air adjusting screw.
7. Disconnect the SST-(System Selector).

Idle-up Speed:
1. Perform "Preparation".
2. Verify that the idle speed is within the specification.

Specification: 760 - 800 (780 ± 20) RPM

3. If not as specified, adjust the idle speed.
4. Check the idle speed with the following load conditions.




Specification

NOTE: Excludes temporary idle speed drop just after the electrical loads are turned on.

5. If not as specified with all load conditions, inspect the idle air control valve.
- If not as specified with some load condition, check related input switches, harnesses and connectors.