9000 Aero L4-2290cc 2.3L DOHC Turbo EFI (1996)
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If the display response is OFF 12 V :
If the car is installed with Trionic engine management system:
Contact the Trionic (10) and activate CHECK ENGINE.
If CHECK ENGINE does not work at ON, check the lead from Electronic Display Unit (EDU) control module pin 12 to Trionic control module
pin 32 for open circuit. Localize and remedy the fault.
Connect a BOB to the EDU control module with the connector plugged in to the EDU control module. Ground pin 12 to pin 21.
If the lamp lights, change the Trionic control module.
If the lamp does not light, proceed to "Action Before Changing A Control Module".
If the car is installed with Motronic engine management system:
Contact the Motronic and activate CHECK ENGINE.
If CHECK ENGINE does not work at ON, check the lead between EDU control module pin 12 and Motronic control module pin 22 for open
circuit. Localize and remedy the fault.
Connect a BOB on the EDU control module with the connector plugged in to the EDU control module. Ground pin 12 to pin 21.
If the lamp lights, change the Motronic control module.
If the lamp does not light, proceed to "Action Before Changing A Control Module".
2
Connect the ISAT and read "CHECK ENGINE LAMP". Start the engine.
If the display response is OFF 12 V, proceed to "Action Before Changing A Control Module".
If the display response is ON 0 V, switch oft the engine and unplug the connector to the Trionic/Motronic.
Switch on the ignition. If the lamp goes out, change the engine management system control module.
If the lamp does not go out, check the cable assembly between Electronic Display Unit (EDU) control module pin 12 and Trionic control module
pin 32/Motronic control module pin 22 for short circuit to ground.
If the fault remains, proceed to "Action Before Changing A Control Module".
Check Radiator