With the development of diesel-jet vehicle technology, diesel vehicles have evolved from country two to country three, country four, country five and even country six, and cars are becoming more electrically controlled! It's getting harder and harder for the mechanics
Here's some of the repairs to the diesel tracks
Basic configuration: 6l eu3 engine, high pressure pump 0445120092, jet 044512156, control system bosch edc7uc31
Symptoms of failure: only up to 1800rpm for start-up, sometimes difficult to start engines
Fault code: deviations above threshold for p1012 orbit pressure and overload of oil spray
Diagnostic process:
1. Dismantling of the oil dispenser from the engine and inspection of the oil dispenser on the eps200。
Installation of the oil dispenser on the engine remains faulty
3. High pressure pump pressure when activated using a diesel pressurized package, capable of building 300 bar pressure at a moving rate。
4. Check the sealing of the restricted valve, which is good。
5. Use diesel pressurized packages to check the co-orbit for pressure at the starting speed, with a maximum of 110 bar pressure
6. Use of the oil dispenser tester to check the oil dispenser and cross-take connection and leakage, no problems with connection and leakage
7. Use of the oil dispenser tester to check the sealing of the oil pump and find that the first tank is not sealed
8. Replacement of high-pressure pump plugs and breakdowns。
Suggested steps for inspection:
The jet pump vent is used as a sub-interfacing interface to check whether the pressure of the pump at the start-up speed can be established and pumped out of the valve sealing. If pressure cannot be established, the pump pump is well sealed, first checking the low-pressure road, such as the low-pressure road, and the high-pressure pump into the valve; if pressure is established, the pump pump is not well sealed, and the pressure pump plug is replaced directly. If pressure can be established, the pump pump is in good sealing performance and checks the co-orbit limit valve, the total refuelling of the sprayer。
Basic configuration: oman fukuda, withai wp 10. 290, pn2. 2, jets 04451217, control system bo, edc7uc31.
Symptoms of failure: unstable engine work, sound of troughs, low power, ash smoke in exhausts at high speed and firing。
Fault code: none
Diagnosis:
In view of the symptoms of the failure, the failure of individual cylinders, which should be examined for break-out through the use of broken-barrel plugs, the fact that the fifth tank had been cut off, the failure to knock on the fifth tank, the acceleration of the high-speed rate was normal, and the failure of the fifth tank was determined by the fact that when the fifth tank was removed, the plate bolt was looser, the fifth tank was removed and the tank was found to have a severe carbon load and a chain of gas, which led to the failure of the fifth tank to be judged as a result of a loose plate。
Basic configuration: oman fukuda, withai wp 10. 290, pn2. 2, jets 04451217, control system bo, edc7uc31.
Symptoms of failure: unstable engine work, insufficient power, ash smoke in exhausting pipes at high speed, and firing。
Fault code: none
Fault diagnosis: one of the two bottles is old, and it's normal to replace it
Basic configuration: oman fukuda, withai wp 10. 290, pn2. 2, jets 04451217, control system bo, edc7uc31.
Symptoms of failure: the engine suddenly shuts down and can no longer move。
Fault code: fail code 1645, flash code 221。
The failure diagnosis: motors are activated at start-up, high voltage pumps at start-up speed can build up 400 bar pressure, 22 v at start-up of start-up cylinders and 19 v at multiple start-up. Commencing synchronous signal 2-48. The oil dispenser is damp in its parts. It follows that the failure was essentially a mechanical failure and that the cam belt was loosed at the start。
Basic configuration: east wind power, renault engine, dci11 engine, co-orbit high pressure pump pn2. 2, jetjet 044512106, control system: bosta 7uc31.
Symptoms of failure: engine speed limit 1500rpm。
Fault code: p1014 fuel pressure values are not credible when the engine slips
Dismantling fuel metering unit found fuel metering unit haircards, cleaning and installation of in situ start-ups found no malfunctions, and road tests continued. Dismantling of the oil bolts revealed a jamming of the oil bolt filters, replacing the oil bolts, resulting in no malfunction at the start of the site and continued after the road tests. Following the release of the oil dispenser and the refuelling link, which revealed excessive refuelling, the valve component haircard was found during the cleaning of the jet, and the prejet and full load were detected on eps 200 above the upper limit, and the refuelling was normal. Once the oil dispenser has been reconfigured, the problem is solved。
Basic configuration: 50 bell 6hk1, electrical assembly system, hp0 high pressure pump
Symptoms of failure: auto-activation of the engine in about two minutes after start-up, failure to start immediately after start-up, waiting for about five minutes to start again. No trouble code
Diagnosis of failure: 21 v of the cylinder is measured when the vehicle is activated. The generator was suspected of malfunctioning, but after the start-up check the b-end voltage was 28v, thus eliminating the generator malfunction. When the engine was unable to start, the 15-end ignition switch was checked to have zero back-line voltage, indicating that there was a short-circuit to the ground on the line, and the line was recut, leading from the ignition switch to the euu and the failure was resolved。
Basic configuration: liberation of j6 vehicles, bo edc7uc31
Symptoms of failure: auto-activation of the engine and failure to start the vehicle
Fault diagnosis: 1. 40 earth-to-ground voltage is normal when the ignition switch is on, zero voltage at start-up, and is suspected of guidance or link problems between 1. 40 and the ignition switch, and can be activated directly from the 15 end of the ignition switch to 1. 40。
Basic configuration: iveco iv edc17cp
Symptoms of failure: speed limit of vehicle, failure code 02154: power limit level 3 function activated. 01843 switch (auxiliary transmission device) failure (actually oil-water separation water level alert switch failure)。
Fault diagnosis: from the breakdown code analysis, the failure code 01843 was the cause of the failure code 02154, and the failure symptoms were eliminated after the failure of the oil-water separator。
Basic configuration: ivico 4, edc17cp, cb18 pumps
Symptoms of failure: engines cannot be activated, oil dispenser high pressure pumps have been inspected, failure code 00436 air flow meter signals are not credible。
Diagnosis of failure: read data streams, air flow values of 11 mg at start-up, rated 540 mg. The pressure booster sensor is released and can be activated, but black smoke rolls. It is recommended to check the vent and find a rag at the preheat fence in the vent. Post-exit solution。
10
Basic configuration: iveko state 4, edc17cp, cb18 oil pump (relocation, seo yudong)
Symptoms of failure: engines cannot be activated, oil dispenser high pressure pumps have been inspected, failure code 00436 air flow meter signals are not credible。
Diagnosis of failure: read data streams, air flow values of 11 mg at start-up, rated 540 mg. The pressure booster sensor is released and can be activated, but black smoke rolls. It is recommended to check the vent and find a rag at the preheat fence in the vent. Post-exit solution。
Eleven
Basic configuration: boshi edc17cv54+egr system
Symptoms of failure: speed limit of vehicle, failure code: 00822 air quality sensors: signal failure. 00981 recycle spiral ring electromagnetic valves: break roads。
Diagnosis of failure: it is recommended to screen 00981 breakbacks and egr emp connection lines. It's out。
12
Basic configuration: heavy red rock equipped with wood wp12 engine, boshi edc7uc system, with a single oil door pedal with a glitch switch, without a remote door。
Symptoms of failure: engines work at a fixed speed of 1,000 rpm, with no reaction from the gas doors。
Fault code: p2135 oil pedal 2 and gas pedal 1 signal are less credible
Data stream: pedestal 1 signal glitch 0. 4v, plus ultimate gas pedal signal voltage 4. 2v, no matter how open the pedal is 17% unchanged。
Circuit chart:
Diagnosis of malfunctions: 15v signal end voltage without stepping on the oil door pedal switch and 15v floor end voltage without stepping on the window switch. Indicates that there is no failure of the glitch switch. Under normal conditions, the signal end voltage of the glitch switch should change (later detected at 12v), while the 15v end voltage of the glitch is equal to the end of the signal, indicating two problems: the break in the glitch of the glitch switch and the failure of the ecu itself, the further examination of the 15v of the 1. 29 lead voltage to the ground voltage of the bilge, indicating that it was well-directed and ultimately determined that the ecu failed。
Solutions: replacement of euu。
13
Configuration: east wind, dorika edc17cv54
Symptoms of failure: the car is moving well, empty gas doors can reach 3,000 rpm, upped to 1,500 rpm, and only pressure pressure pressure sensor signals fail occasionally。
Data stream: read pressure booster pressure, air flow data stream, find pressure booster pressure normal and air flow negative at acceleration。
Fault diagnosis: it is recommended to clear into the airway and find a piece of paper (which should be the filter pass) on the side of the near-air flow sensor in the airway, and then everything is normal。
14
Configure: jiang bell to edc17c55
Symptoms of failure: a serious tanning at medium speed, no malfunction code。
Client processing: oil jets, computer boards, oil jet beams were replaced, cam axes, warp axes were checked and the failure continued。
Fault diagnosis: the actual orbital pressure of the co-orbit is read through the data stream, which leads to a relatively high rate of orbital volatility, which should be caused by poor contact at the orbital sensor interface. Change orbital pressure sensor plugs, troubleshooting
