199003117 - P0089 Press. on injector support

		Test results
1	POWER SUPPLY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check there are no faults in the fuel supply circuit    See Test 1040OA FUEL SUPPLY CIRCUIT CHECK	Move on to Step 2
2	FUEL PUMP RELAY CHECK	All OK	Problems encountered	Operation
	Check that the fuel pump relay operates correctly    See Test 1040AD CHECK FUEL PUMP RELAY FUNCTIONS	Move on to Step 3
3	HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel pressure parameter is correct    See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK	Move on to Step 13	Pressure not correct	Move on to Step 4
4	INJECTOR HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another.    See Test 1060OC INJECTOR SEAL TEST	Move on to Step 5	Significant leak from one injector	Replace the injector    Op. 1060F10 FUEL INJECTORS - R.R.
5	LOW RETURN PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the pressure in the return pipe to the tank is less than 1 bar    See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECK	Move on to Step 6	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe, if necessary, replace it
6	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar    See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	Move on to Step 12	Pressure below the minimum limit or above the maximum limit	Move on to Step 7
7	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Constrict the return pipe downstream of the valve and carry out the test once again with the pipe constricted checking that the pressure at the filter outlet remains below 2 bar    See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	Move on to Step 8	Pressure rises to 5 bar: pressure regulator valve on filter mounting incorrectly adjusted	Replace the valve
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Move on to Step 9	Difference in pressure more than 1 bar	Replace the fuel filter cartridge    Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
9	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the supply pump pressure at the filter inlet is more than 2.2 bar	Move on to Step 12	Pressure below 2.2 bar	Move on to Step 10
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.3 bar	Move on to Step 11	Difference in pressure more than 0.3 bar	Replace the pipe
11	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the pump supply voltage is equal to 13V and that the current uptake is between 2 and 10 A    See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE	Move on to Step 12	1. Voltage lower than 12 V2. Current out of range: pump defective	1. Renew electrical wiring    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT 2. Replace the fuel pump    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
12	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Replace the DRV high pressure regulation valve and check that the fault is no longer present.    Op. 1060E10 DIESEL INJECTION PRESSURE PUMP - R.R.	End of diagnosis	Fault persists	Contact technical service for further information on the problem
13	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Replace the engine management control unit and check that the fault is no longer present    Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R	End of diagnosis	Fault persists	Contact technical service for further information on the problem