Suzuki Vitara, Grand Vitara, XL7 2000-06

Adjustment

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1.6L Engine



This engine is equipped with a Distributorless Ignition System (DIS). All timing functions are controlled by the Powertrain Control Module (PCM). No adjustment is possible.

This engine is equipped with a Distributorless Ignition System (DIS). All timing functions are controlled by the Powertrain Control Module (PCM). No adjustment is possible.

1.8L, 2.0L, 2.5L & 1998 1.6L Engines




NOTE
The 1.8L, 2.0L and 2.5L engines use a Camshaft Position (CMP) sensor that is rotated to set base timing. The procedure is the same as for the 1998 1.6L engine distributor.


NOTE
Check and adjust the ignition timing with the engine at normal operating temperature, all electrical accessories OFF and transmission in P , N for automatic transmission or neutral for manual transmission.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. With the engine OFF , connect a jumper wire between terminals 4 and 5 of the Data Link Connector (DLC) for Tracker or between terminals D and E of the DLC for all others.
  4.  
  5. Connect a timing light to the No. 1 spark plug wire and start the engine.
  6.  
  7. Ignition timing at idle should be 4-6 degrees Before Top Dead Center (BTDC).
  8.  
  9. Adjust the timing as necessary, then turn the engine OFF .
  10.  
  11. Remove the jumper wire from the DLC and remove the timing light.

    Click image to see an enlarged view

    Fig. Duty Check Data Link Connector terminal identification for ignition timing



    Click image to see an enlarged view

    Fig. Camshaft position sensor-1.8L engine shown

  12.  

2.0L & 2.5L Engines




NOTE
The 2.0L and 2.5L engines use a Camshaft Position (CMP) sensor that is rotated to set base timing.


NOTE
Check and adjust the ignition timing with the engine at normal operating temperature, all electrical accessories OFF and transmission in P , N for automatic transmission or neutral for manual transmission.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. With the engine OFF , connect a jumper wire between terminals D and E of the Data Link Connector (DLC).
  4.  
  5. Connect a timing light to the No. 1 spark plug wire and start the engine.
  6.  
  7. Ignition timing at idle should be 4-6 degrees Before Top Dead Center (BTDC).
  8.  
  9. Adjust the timing as necessary, then turn the engine OFF .
  10.  
  11. Remove the jumper wire from the DLC and remove the timing light.

    Click image to see an enlarged view

    Fig. Camshaft position sensor

  12.  

2.7L Engine




NOTE
Before starting engine, place transmission gear shift lever in -Neutral- (shift selector lever to -P- range for A/T model), and set parking brake.

  1. Start engine and warm it up to normal operating temperature.
  2.  
  3. Make sure that all of electrical loads except ignition are switched OFF.
  4.  
  5. Check to be sure that idle speed is within specification.
  6.  
  7. Connect Suzuki scan tool to DLC (1) with ignition switch OFF, restart engine and fix ignition timing by using fixed spark mode of Suzuki scan tool.

    Click image to see an enlarged view

    Fig. Diagnostic scan tool and connector

  8.  
  9. Set timing light to ignition harness for No.1 cylinder.
  10.  
  11. Using timing light, check that timing observed from viewpoint is within specification 5° plus or minus 1°BTDC.

    Click image to see an enlarged view

    Fig. Timing light and timing mark viewpoint.

  12.  
  13. If ignition timing is out of specification, check the followings.

    CKP sensor
     
    CKP sensor plate
     
    TP sensor
     
    CMP sensor
     
    CMP sensor rotor tooth of camshaft
     
    Wheel speed sensor
     
    Timing chain cover installation
     

  14.  
  15. After checking initial ignition timing, release ignition timing fixation by using scan tool.
  16.  
  17. With engine idling (throttle opening at closed position and vehicle stopped), check that ignition timing is about 10-16°BTDC. (Constant variation within a few degrees from 10- 15° BTDC indicates no abnormality but proves operation of electronic timing control system.) Also, check that increasing engine speed advances ignition timing. If the check results are not satisfactory, check CKP sensor and ECM.
  18.  

 
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