Gasoline injection and ignition system (ME-SFI) - Diagnosis - Trouble-shooting - AD07.61-P-5000A
ENGINES 112.910,
112.911 up to 31.5.00,
112.920,
112.921 up to 31.5.00,
112.923,
112.940 /941 /942 up to 31.5.00,
112.943
| Hazard from contact with parts conducting high voltages. | Do not touch parts which conduct high voltages. Persons who wear electronic implants (e.g. heart pacemakers) must not carry out work on the ignition system. | AS15.10-Z-0001-01A | |
| Lethal hazard from being drawn into rotating vehicle parts | Do not reach into rotating parts. Wear closed and close-fitting work clothes. Secure area of rotating vehicle components against unauthorized access. |
AS00.00-Z-0004-01A | |
| Risk of explosion from fuel igniting, risk of poisoning from inhaling and swallowing fuel as well as risk of injury to eyes and skin from contact with fuel. | No fire, sparks, naked flames or smoking. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing when handling fuel. |
AS47.00-Z-0001-01A | |
| Notes on avoiding damage to the ignition system | Engines 104, 111, 112, 113, 119, 120 with ME-SFI fuel injection and ignition system | AH15.10-P-0002-01D | |
| Gasoline injection and ignition system (ME-SFI) - diagnosis - previous knowledge | AD07.61-P-2000A | ||
| Troubleshooting | |||
| Complaint | Possible cause | Remedy/test step | |
| Engine does not start easily when cold and does not accelerate well | Activation of fuel injectors and injection time | 3/11 | AD07.61-P-6000-18A |
| Hot film mass air flow sensor (B2/5) | 2/11 | AD07.61-P-6000-19A | |
| Coolant temperature sensor (B11/4) | 4/11 | AD07.61-P-6000-20A | |
| Ignition voltage too low | - | AD07.61-P-6000-21A | |
| Air leak | - | AD07.61-P-6000-22A AD07.61-P-6000-23A AD07.61-P-6000-04A AD07.61-P-6000-05A AD07.61-P-6000-08A AD07.61-P-6001-17A Eliminate air leak |
|
| Engine does not start | Voltage supply not available | - | AD07.61-P-6000-01A |
| Malfunction in the drive authorization system (DAS) | Vehicle authorization 1/1 | AD07.61-P-6000-02A | |
| Fuel pump | - | AD07.61-P-6000-03A | |
| No compression pressure because oil pressure too high | - | AD07.61-P-6000-34A | |
| Ignition voltage too low | - | AD07.61-P-7001-01B Check compression pressure or oil pressure AD07.61-P-6001-17A |
|
| Engine not smooth when idling | Activation of fuel injectors and injection time | 3/11 | AD07.61-P-6000-18A |
| Air leak | - | AD07.61-P-6000-19A AD07.61-P-6000-20A AD07.61-P-6000-21A AD07.61-P-6000-22A AD07.61-P-6000-23A Eliminate air leak |
|
| Engine has poor output | Three-way catalytic converter has flow rate that is too low | - | Check exhaust back pressure, see diagnosis manual vol. 1 index A "engine performance" |
| Oxygen sensor on left/right upstream of TWC | 8/11 | AD07.61-P-6000-10A | |
| Coolant temperature sensor (B11/4) | 4/11 | AD07.61-P-6000-11A | |
| Hot film mass air flow sensor (B2/5) | 2/11 | AD07.61-P-6000-12A | |
| Variable intake manifold without function | - | AD07.61-P-6000-13A | |
| Anti-knock control at the control stop | 2/11 | AD07.61-P-6000-08A AD07.61-P-6000-04A AD07.61-P-6000-28A Knock sensors |
|
| Engine does not run smoothly (shakes) | Activation of fuel injectors and injection time | 3/11 | AD07.61-P-6000-18A |
| Fuel injectors have leak, spray pattern | - | AD07.61-P-6000-19A | |
| Oxygen sensor on left/right upstream of TWC | 8/11 | AD07.61-P-6000-20A | |
| Ignition voltage too low | - | AD07.61-P-6000-21A | |
| Compression pressure of one or more cylinders too low | - | AD07.61-P-6000-22A | |
| Air leak | - | AD07.61-P-6000-23A | |
| Exhaust gas recirculation valve has leak/sticks | - | AD07.61-P-7002-01A AD07.61-P-7002-01B AD07.61-P-6000-10A AD07.61-P-6000-11A AD07.61-P-6000-12A AD07.61-P-6000-13A AD07.61-P-6001-17A Check compression pressure Eliminate air leak Replace exhaust gas recirculation valve |
|
| Engine does not run smoothly (misfire) | Ignition voltage too low | - | AD07.61-P-6001-17A |
| Hot film mass air flow sensor (B2/5) | 2/11 | AD07.61-P-6000-04A | |
| Engine fails after cold start | Air leak | - | Eliminate air leak |
| Transition fault when running warm | Coolant temperature sensor (B11/4) | 4/11 | AD07.61-P-6000-08A |
| Hot film mass air flow sensor (B2/5) | 2/11 | AD07.61-P-6000-04A | |
| Air leak | - | Eliminate air leak | |
| Transition fault when warm or with poor fuel economy | Oxygen sensor on left/right upstream of TWC | 8/11 | AD07.61-P-6000-10A |
| Purge control valve (Y58/1) continuously open (sticks) | 4/11 | AD07.61-P-6000-11A AD07.61-P-6000-12A AD07.61-P-6000-13A AD07.61-P-6000-29A AD07.61-P-6000-30A |
|
| Engine jolts | Hot film mass air flow sensor (B2/5) | 2/11 | AD07.61-P-6000-04A |
| Ignition voltage too low | - | AD07.61-P-6000-05A | |
| Oxygen sensor on left/right upstream of TWC | 8/11 | AD07.61-P-6001-17A AD07.61-P-6000-10A AD07.61-P-6000-11A AD07.61-P-6000-12A AD07.61-P-6000-13A |
|
| Electronic accelerator is in limp-home function | Set value potentiometer in the pedal value sensor | 5/11 | AD07.61-P-6002-01A |
| 5/11 | AD07.61-P-6002-01B | ||
| Actual value potentiometer in the actuator | AD07.61-P-6002-03A |