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旧 Jun 3rd, 2006, 11:23     #1
LittleKnife
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默认 请教,插头电阻值?

车载电脑的40芯的母插头,我把线剥开量裸线到插孔内壁的阻值,地线和火线的是8欧姆到10欧姆,其它的0.1欧姆. 请叫大侠们,8欧姆的阻值正常吗? 谢谢!

Chrysler Sebring Lx 2001, 2.4L DOHC, 30万
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旧 Jun 3rd, 2006, 12:48   只看该作者   #2
bigeyedog
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默认

除非插头里有个8欧姆的电阻,否则不正常,应该是毫姆级别的,0.1欧姆欧是表的误差
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旧 Jun 3rd, 2006, 13:42   只看该作者   #3
LittleKnife
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默认

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作者: bigeyedog
除非插头里有个8欧姆的电阻,否则不正常,应该是毫姆级别的,0.1欧姆欧是表的误差
谢了.
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旧 Jun 3rd, 2006, 15:50   只看该作者   #4
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默认

你的车电脑歇菜了?值得你这样大动干戈。ECM一般工作电流比较大,如果真的有这样大的阻值肯定会工作不正常的。
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旧 Jun 3rd, 2006, 23:08   只看该作者   #5
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默认

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作者: 有门!
你的车电脑歇菜了?值得你这样大动干戈。ECM一般工作电流比较大,如果真的有这样大的阻值肯定会工作不正常的。
阻值是我测量有误.
TCM不向SOLENOID提供供电和档位信号,但有手档(Manual Lever Valve Position)指示信号输出到前面板. 我打算换个TCM啦. 谢谢.
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旧 Jun 3rd, 2006, 23:26   只看该作者   #6
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默认

慎重考虑,如果有条件替换试验可以。TCM认为不该让SOLENOID动作,说明提供给TCM的状态信号不正常,并不是TCM本身问题。TCM更换多在DRIVER烧毁,就是HIGH SIDE/LOW SIDE OPEN/SHORT CIRCUIT之类的,部分工作应侧重检查TCM BATTERY VOLTAGE/IGNITION VOLTAGE和GROUND(包括信号地),如果这些没问题,TCM肯定能与PCM通信,利用DATA LINK做FUNCTION TEST,如果没问题可以马上排除SOLENOID、TCM问题,侧重检查SENSOR,尤其我提到的TRANNY INPUT SPEED SENSOR和VSS等。SOLENOID UNIT在KEY ON和OFF会动作,手放在外壳应该会有感觉内部动作,也可以使用听诊器,你好象已经提到这点,倒是很象DRIVER坏掉了。另外,一些车的SOLENOID插头接触不良,也会引起CODE的。这点,你也可以在KEY ON时,插拔SOLENOID HARNESS看内部是否有CLICK来检验。
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旧 Jun 4th, 2006, 00:58   只看该作者   #7
LittleKnife
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默认

引用:
作者: 有门!
慎重考虑,如果有条件替换试验可以。TCM认为不该让SOLENOID动作,说明提供给TCM的状态信号不正常,并不是TCM本身问题。TCM更换多在DRIVER烧毁,就是HIGH SIDE/LOW SIDE OPEN/SHORT CIRCUIT之类的,部分工作应侧重检查TCM BATTERY VOLTAG...
谢谢有门!
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旧 Jun 5th, 2006, 00:26   只看该作者   #8
LittleKnife
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默认

引用:
作者: 有门!
慎重考虑,如果有条件替换试验可以。TCM认为不该让SOLENOID动作,说明提供给TCM的状态信号不正常,并不是TCM本身问题。TCM更换多在DRIVER烧毁,就是HIGH SIDE/LOW SIDE OPEN/SHORT CIRCUIT之类的,部分工作应侧重检查TCM BATTERY VOLTAG...
今天,把TCM卸掉,然后手动给SOLENOID加电,加信号,发现1档(起步档)轮子不转,2,DIRECT DRIVE, OVER-DRIVE都工作. 但PRESSURE SWITCH返回的信号都不对. SOLENOID的连通没问题. 看来TRANSMISSION那头(液压,机械部分)还是有故障.
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