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p1388. no spark

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Old Jul 10, 2014 | 04:17 PM
  #1  
armymech4's Avatar
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Default p1388. no spark

p1388
Its a 97 country. That's the only code its throwing. I also have no spark and no rpm on the scan tool. I even HotWired the ASD to send voltage to the coil. Still no spark. I have even checked all grounds in the engine compartment and all check good. 0 ohms. I did an ohm check of the crank sensor and it tests good. On the coil driver circuit I have 110k ohms. I measured it by unplugging coil and putting one lead into driver side and one on the battery. I wanna replace the crank sensor but it tests good. I'm worried now that the ignition module of the ecu is shot.
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Old Jul 10, 2014 | 05:09 PM
  #2  
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From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
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Swap the ASD relay with the AC relay. See if issue and code go away. BYpassing the relay is going to CAUSE the code.
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Old Jul 11, 2014 | 10:24 AM
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Relay is good. My ground circuit through the PCM has 110k ohms. I ohmed the PCM bare from pin 7 c1 to pin 32 c3. Seems too high and is a faulty pcm
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Old Jul 11, 2014 | 12:15 PM
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1388 cleared. Am getting code p0340 now. Camshaft failure. Also view no Rpm on scan tool
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