199002579 - P0100 Air flow meter

This error is detected if the voltage at the junction unit inlet (Pin 42) is too low (with below the lower limit detail) or if there is a short circuit to the positive in the circuit connected to Pin 42 of the junction unit (with beyond the upper limit detail) for at least 0.3 secs.

		Test results
0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	First of all check in the engine compartment junction unit    See B001 JUNCTION UNIT that fuse F43 has not blown (it is the second from the top in the left row).	Move on to Step 1	The fuse has blown	Continue with the    See Test 5505AE ENGINE MANAGEMENT CONTROL UNIT POWER SUPPLY FUSE CIRCUIT CHECK
1	POWER SUPPLY CIRCUIT CHECKS	All OK	Problems encountered	Operation
	Check that the engine oil level is correct    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the    See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECKCheck the condition of the fuel supply circuit and make sure that it is working properly carrying out the    See Test 1040OA FUEL SUPPLY CIRCUIT CHECKCheck the operation of the low pressure supply circuit by carrying out the    See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	Move on to Step 2	Oil level incorrect	Restore the correct engine oil level    Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
2	FLOW METER OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the flow meter is working properly by carrying out the    See Test 1060GG CHECK MEASURED AIR MASS	End of diagnosis	-	-