Fuel injection and ignition system (HFM-SFI) diagnosis, troubleshooting · ad0751p5000a · Mercedes-Benz WIS

AD07.51-P-5000A

Fuel injection and ignition system (HFM-SFI) diagnosis, troubleshooting

4.3.97

ENGINE 111

	Fuel injection and ignition system (HFM-SFI) diagnosis, advance information		AD07.51-P-2000A
	Correcting positions of variable reference resistor (HFM-SFI)		AD07.51-P-2000-09A
	Troubleshooting
Complaint	Possible cause	Note	Remedy/test step
Engine difficult to start and has poor acceleration	Injectors (LH-SFI, HFM-SFI, PEC) (Y62), actuation and injection time Hot film MAF sensor (B2/5) ECT sensor (HFM-SFI, PEC) (B11/3)		AD07.51-P-6000-18A AD07.51-P-6000-19A AD07.51-P-6000-20A AD07.51-P-6000-21A AD07.51-P-6000-04A AD07.51-P-6000-05A AD07.51-P-6000-09A
Engine does not start	Voltage supply from overvoltage protection relay (K1/2) or fuse and relay module (K40, K40/4, F1) missing Crankshaft position sensor (L5) Fuel pump relay (K27) Fuel pumps Fuel injection valves (Y62), actuation and injection time Malfunction of immobilizer, model 124 as of 03/94 or stage 2 immobilizer for all models as of 12/94		AD07.51-P-6000-01A AD07.51-P-6000-02A AD07.51-P-6000-02B AD07.51-P-6001-06A AD07.51-P-6000-06A AD07.51-P-7001-02A AD07.51-P-6000-18A AD07.51-P-6000-19A AD07.51-P-6000-20A AD07.51-P-6000-21A For test refer to Diagnosis Manual Body
Engine idles unevenly	Fuel injection valves (Y62), actuation and injection time Exhaust gas recirculation valve (only , model 202)		AD07.51-P-6000-18A AD07.51-P-6000-19A AD07.51-P-6000-20A AD07.51-P-6000-21A AD07.51-P-6000-39B
Engine idles unevenly and has poor performance	Camshaft adjustment		AD07.51-P-6000-27A AD07.51-P-6000-27B

Referenced documents

ad0751p200009a Correction positions of variable reference resistor (HFM-SFI)
ad0751p2000a
ad0751p2000a Fuel injection and ignition system (HFM-SFI) diagnosis, advanced information
ad0751p600001a Engine control module (HFM-SFI), terminal 30, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600002a Engine control module (HFM-SFI), terminal 87, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600002b Engine control module (HFM-SFI), terminal 87, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600004a Hot film MAF sensor 4-pin, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600005a Hot film MAF sensor 5-pin, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600006a Fuel pump relays, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600009a ECT sensor, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600018a Fuel injection valve (cylinder 1) (Y62/1), testing electrical system of fuel injection system (HFM-SFI)
ad0751p600019a Fuel injection valve (cylinder 2) (Y62/2), testing electrical system of fuel injection system (HFM-SFI)
ad0751p600020a Fuel injection valve (cylinder 3) (Y62/3), testing electrical system of fuel injection system (HFM-SFI)
ad0751p600021a Fuel injection valve (cylinder 4) (Y62/4), testing electrical system of fuel injection system (HFM-SFI)
ad0751p600027a Adjustable camshaft timing solenoid, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600027b Adjustable camshaft timing solenoid, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600039b EGR switchover valve, testing electrical system of fuel injection system (HFM-SFI)
ad0751p600106a CKP sensor, testing electrical system of ignition system (HFM-SFI)
ad0751p700102a Fuel pressure, current consumption, testing hydraulics, fuel pump (HFM-SFI)