Case 1
Symptom: Occasionally, when the horn does not ring phenomenon, this time turning around about as long as the steering wheel (about 30deg;), the horn will be back to normal, there is no regularity failure.
check analysis: initial inspection and grounding horn, horn relay, horn buttons, and harness were normal. Considering the failure of a relationship with the steering angle, the steering wheel so the judge and the occasional bad body grounding, it can not at this time provide grounding to horn relay, the relay does not work, the horn does not ring also in the process of turning.
troubleshooting: anxious car because the user is not allowed to check disassembled, then maintenance personnel between the steering column and the vehicle body increases a grounding line (FIG. 1), test troubleshooting.
Figure 1
Case 2
Symptom: sunroof and CD player does not work.
Check analysis: Symptom confirmation, in the case where the ignition switch is opened, the display does not sound and the background light is not bright, then the initial portion is determined that the power failure. After examination, the fuse box 23, the engine compartment fuse (10 A) is blown, blown immediately after exchanging the fuse, where there appeared to short circuit. Access to information that, related fuse part 23 includes a sound, the control means sunroof, remote start prevention means, the meter module and the diagnostic data plug, if more devices to check individually disconnected, the heavy workload, and not necessarily able to troubleshoot. Because these components sound and large power sunroof, according to the principle of the easier, skylights first disconnect cable fault persists, the acoustic short circuit fault disappears after disassembly. Shake to remove the CD, there is abnormal sound heard inside, open and found the inside there are two coins (probably a child to go into), it seems that this is the cause of acoustic short circuit.
troubleshooting: After removing the coins from the CD player, in replacing the removed member, to confirm test No. 23 fuse not blown, skylights and CD player can work properly.
Case 3
Symptom: When cold or reverse, the engine idle severe jitter, jitter hot car has been reduced.
inspection analysis: It was observed maintenance personnel, such as jitter right engine supporting mechanical reasons due footbed. The car engine with the right foot pad support hydraulic structure, the vehicle used for a long period of time, a long time since the vibration causes the support foot pads sink, the gap becomes smaller, the performance of early failure ldquo generated by rapid deceleration of the vehicle when the belt ; boom rdquo; abnormal sound, vibration of the engine than before, severe cases can break internal supporting foot pads, the engine directly supported (FIG. 2), then it will generate greater vibration above the base.
FIG. 2
Solution: Replace the right side of the engine support pads, test troubleshooting. The new engine support mat has been adjusted in the gap, so rarely recurrence of such a problem.
Case 4
Symptom: at a faster speed when turning the steering wheel, the steering wheel will hear there ldquo; crash rdquo; sound, when driving on uneven ground is more obvious .
Check Analysis: When the steering wheel is rotated, the horn button spring from sliding, interference may occur and the wire harness and airbag, thereby generating abnormal noise.
Figure 3
Troubleshooting: Turn off the ignition switch and disconnect the battery cable, remove the main airbag, the spring 3 at the horn button apply some grease (FIG. 3), and then put back to. During the installation of the wire harness should be noted that a fixed, or otherwise abnormal sound is generated, the wire harness may be spray some surface table board wax to reduce friction, so as to completely troubleshooting.
Case 5
Symptom: cold car turn the steering wheel, can be heard ldquo; beep, beep rdquo; sound, and the frequency of the sound of the car after the heat is reduced or eliminated.
check analysis: test found that the steering wheel to the left or to the right limit position, indeed ldquo; squeak, squeak rdquo; sound, which is the power steering pump pressure relief voice is normal . But in turn the steering wheel between the extreme positions have a similar sound, especially in the cold car the most obvious, according to maintenance experience, thisUsually power steering oil or dirty air caused.
Troubleshooting: complete replacement of power steering fluid, the steering wheel back and forth to a position close to the limit, to exclude air, thus repeated a plurality of times, a final test to determine abnormal sound disappears.
(YANGSHI only)