Important!! This part of site is an attempt to organize and add to the web resources for the Rover SD1 to form a cohesive and easily usable guide for those of us without easy access to expert repair and/or advice. It is not offered in any way as a definitive source and we take no responsibility for any errors that may exist. Webmaster: Rene Winters

Fast Check Testing Now testing of the fuel management system using this Fast check equipment. You will also need to connect an accurate tachometer. We will start by setting the fast idle. Connect the Fast check as you see here: to connector '1' to the coolant sensor, and in place of the ambient sensor '2'. Select 30K on the Fast check, start the engine and run it until normal temperature is reached. Incidentally, the selection of 30K will position the automatic enrichment device in the 'full choke' position, so if the engine is already warm select either 600R or 1K. Having obtained running temperature, you must next select the correct switch position for the model you are working on. Both the switch position and the correct fast idle varies, depending on the car model and the ECU type fitted. You will find the specifications listed in the Fast Check instruction card.

Adjust the fast idle screw to give the correct engine speed, then disconnect the Fast check. The fast idle is now correctly set. For fault diagnosis, disconnect the multiplug at the ECU and connect the fast check to it. Turn on the ignition but do not start the engine. In this condition the ignition, throttle and coil LED's on the Fast check should illuminate. If the ignition LED does not light, check the white wire supply to terminals 4 and 5 on the ECU. If the coil LED does not light, check the white/black wire to terminal 11. If the throttle light is off, check the continuity of the throttle switch circuit.

In this same condition, the coolant, air temperature and stepper LED's should be off. If either the coolant or air temperature lights are on, check the wiring to the respective sensor. If the wiring is OK, replace the sensor. Now the stepper motor LED's. If the 'HI' light is on, check for open circuit. If 'LO' is on check for short circuit. If both conditions are OK, the stepper motor is faulty and should be replaced. The next test is to depress the throttle pedal; the throttle LED should go out. If it stays on, check the throttle switch for a short circuit. Now test the fuel shut-off valve. Select 'ON' on the solenoid switch and you should hear a click from the valve. If you do not, check the wiring first and if this is OK replace the valve. Finally, if all these tests are OK, it is likely the fault is in the ECU. Turn off the ignition and disconnect the Fast check. Gently squeeze together the ECU harness terminals with pointed nose pliers,. then reconnect and retest. Renew the ECU if the fault persists. That completes the Fast check fuel management tests.