F0: Data List - Test Step 22 Iac Block Learn Opel Calibra I

Note:

The IAC BLOCK LEARN gives the nominal air requirements of the engine.

Via the IAC BLOCK LEARN, evaluation of the learned values of the system can be made after a journey (speed influence).

The IAC BLOCK LEARN is only activated if a speed signal is received from the control unit.

(A precondition is an installed odometer frequency sensor) The odometer frequency sensor must only be installed together with the board computer and LCD instrument.

On vehicles without odometer frequency sensors, the value must be constantly 128.

Trouble-shooting: Nominal Value: Cause of Fault:

Engine at idle speed

· If % is constantly · Air loss (leaks) at

< 34 34 to 42% throttle body, intake system,

and bypass line

IAC INTEGRATOR const. < 128 steps 128 to 136 steps

IAC INTEGRATOR const. < 127 steps · Throttle valve open,

accelerator cable or throttle valve jams

· Idle speed adjuster jams, does not close Carry out F5:ACTUATOR TEST, test step 01

· If IAC BLOCK LEARN is constantly IAC BLOCK LEARN · Lack of air

> 136 steps 128 to 136 steps - Idle speed adjuster jams, does not open

and simultaneously IAC PULSE RATIO 34 to 42 % - Bypass air hose blocked or kinked

IAC PULSE RATIO is constantly IAC INTEGRATOR 127 - Carry out F5:ACTUATOR TEST,

> 42 % to 135 steps test step 01

IAC INTEGRATOR is constantly

> 136 steps

Other Causes of Faults: · Control unit defective

(Checking, see Table 5 F5:ACTUATOR TEST, test step 01)

· Mass air flow sensor defective

(Checking, see test step 05)

· Throttle valve switch defective

(Checking, see test step 07)

· Mixture too rich

(Checking, see test step 25)