Turbocharger: Service and Repair

Adaptation

Important: The engine should be thoroughly warmed up. Basic boost pressure should be correctly adjusted. Use high-grade fuel with a high octane rating.

Cars with a manual gearbox




1 Ignition switch in the OFF position. Zeroize adaptation in the control module by removing fuse 23 for about 10 seconds.

2 Peel back the rubber cover on the throttle switch connector and connect a wire jumper between pins 2 and 3 at the rear of the connector (to simulate a closed throttle switch). (Not applicable to LH 2.4.2 and ETS.)

3 Accelerate at wide open throttle in as high a gear as possible, from about 2000 rpm up to 3500 rpm.

4 Since the minimum time for passing the adaptation range ought to be longer than 3 seconds, it is advisable to carry out adaptation on an uphill gradient.

The adaptation range is 2750-3250 rpm (-M90) or 2750-4500 rpm (M91-).

5 Repeat the procedure until the maximum possible boost pressure, having regard to the grade of fuel, etc.., is obtained.

If the boost pressure is too low or too high, continue diagnosis of the fault symptoms as described on page.

6 Remove the wire jumper and refit the rubber cover. (Not applicable to LH 2.4.2 and ETS.)


Cars with automatic transmission




1 Ignition switch in the OFF position. Zeroize adaptation in the control module by removing fuse 23 for about 10 seconds.

2 Peel back the rubber cover on the throttle switch connector and connect a wire jumper between pins 2 and 3 at the rear of the connector (to simulate a closed throttle switch). (Not applicable to LH 2.4.2 and ETS.)

3 Accelerate at as wide a throttle opening as possible without activating the kick-down function, from about 2000 rpm up to 3500 rpm.

4 Since the minimum time for passing the adaptation range ought to be longer than 3 seconds, it is advisable to carry out adaptation on an uphill gradient.

The adaptation range is 2750-3250 rpm (-M90) or 2750-4500 rpm (M91-).

5 Repeat the procedure until the maximum possible boost pressure, having regard to the grade of fuel, etc.., is obtained.

If the boost pressure is too low or too high, continue diagnosis of the fault symptoms as described on page 92.

6 Remove the wire jumper and refit the rubber cover. (Not applicable to LH 2.4.2 and ETS.)