Can Anyone Help With U1412 Code | Dodge Cummins Diesel Forum

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2007.5-2009 3rd Gen Dodge 6.7L Cummins
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davo1977

2007 3500 c&c 6.7 U1412- no signal from speed sensor I installed my engine brake switch, speedo quit working, abs light, and brake light on, so i unplugged everything i hooked up for engine brake switch and replaced speed sensor on rear axle, and still nothing, i keep getting this code, i tried unhooking batteries, and still have code and no speedo, is there a hidden fuse for this? any ideas on what else could be wrong? #1 · Mar 4, 2011 2007 3500 c&c 6.7 U1412- no signal from speed sensor I installed my engine brake switch, speedo quit working, abs light, and brake light on, so i unplugged everything i hooked up for engine brake switch and replaced speed sensor on rear axle, and still nothing, i keep getting this code, i tried unhooking batteries, and still have code and no speedo, is there a hidden fuse for this? any ideas on what else could be wrong? Sort by Oldest first Oldest first Newest first Most reactions #2 · Mar 4, 2011 I'm going to try to figure out how to post the wiring diagram on here. U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED Theory of Operation The ABS Module sends vehicle speed information over the CAN C Bus circuit to the ECM. When Monitored: Ignition on. Set Condition: The ECM gets an implausible signal over the CAN C circuit from the ABS Module. The circuit is continuously monitored. One Trip fault. Possible Causes CAN C BUS CIRCUIT SHORTED CAN C BUS CIRCUIT OPEN ABS MODULE ECM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure). 1. ACTIVE DTC -------------------------------------------------------------------------------- 1. Ignition on, engine not running. 2. With a scan tool, read DTCs. Is the U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED active at this time? Yes Go To 2 No Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure). 2. U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT IS ACTIVE -------------------------------------------------------------------------------- 1. Continue reading DTCs. Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE at this time? Yes (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) for the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT diagnostic procedure. No Go To 3 3. ABS MODULE IS ACTIVE ON THE CAN C BUS -------------------------------------------------------------------------------- 1. With the scan tool, select ECU View. 2. Verify that the ABS Module active on the bus. Is the ABS Module active on the bus? Yes Go To 4 No For No Response diagnostic procedures, (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) . Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure). 4. ACTIVE DTCS IN THE FCM (TIPM) -------------------------------------------------------------------------------- 1. With the scan tool, select ECU View and select FCM (TIPM). 2. With the scan tool, read active DTCs. Is the U0001-NO COMMUNICATION ON THE CAN C BUS CIRCUIT ACTIVE in the FCM at this time? Yes Replace the ABS Module per Service Information. Perform the ABS VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure). No Replace and program the Powertrain Control Module per Service Information. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Engine Control (ECM) - Standard Procedure). #3 · Mar 4, 2011 Basically its going to be the CAN bus circuit or a module. Also if you can't find the problem you can try to restore the vehicle configuration but you will have to take it to the dealer for that. Insert Quotes Post Reply

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