P0700, P0743, P0748, and P0753 codes - Dodge Cummins Diesel Forum
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Old 09-09-2007, 09:11 PM   #1 (permalink)
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P0700, P0743, P0748, and P0753 codes

When making a u-turn earlier today my check engine light came on and the transmission went in to limp mode. I checked the codes and got the above codes, all transmission related. The codes come back immediately after clearning them. Anyone have any ideas what to look at?

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Old 09-10-2007, 12:20 AM   #2 (permalink)
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Just for reference:
P0700 Transmission Control System Malfunction
P0743 Torque Converter Clutch Circuit Electrical
P0748 Pressure Control Solenoid Electrical
P0753 Shift Solenoid A Electrical
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2005 Dodge 3500 QC 4x4 DRW - Goerend Trans, 2nd manifold w/64/71 turbo, 5" exhaust, 90hp stix
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Old 09-10-2007, 01:42 AM   #3 (permalink)
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I've also discovered that only the P0700 code appears when the ignition is switched on and the Trans control module is disconnected. The fuses and relays are functioning properly, I'm starting to think I need a new TCM.

Anyone know a good place to get a TCM other than the stealer?
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2005 Dodge 3500 QC 4x4 DRW - Goerend Trans, 2nd manifold w/64/71 turbo, 5" exhaust, 90hp stix
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Old 09-10-2007, 06:39 PM   #4 (permalink)
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check the connectors going into the trans controller i've had several 03's that the pins in the plugs corroded away. just unplug them and look at them closely.
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Old 09-10-2007, 07:57 PM   #5 (permalink)
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I checked and cleaned both the connector and the transmission and the 3 at the PCM. Both seemed fine. I am going to check for voltage at the transmission connector as well as the solenoid resistance.

Does anyone know where I can find a wiring diagram or pin-out for the connectors?

Thanks again!
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