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Home >> Dodge and Ram >> 2012 >> Challenger SXT Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 256 ((Transmission Control Module (TCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> U1420-Implausible Electronic Gear Select Signal Received >> When Monitored
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When Monitored

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

TCM supply voltage is between 10 and 16 volts.

Ignition switch Run position signal is detected via dedicated circuit to TCM.

Engine speed (CAN message) is greater than or equal to 550 RPM.

The above conditions are met for 5 seconds.

There are no ignition switch failures.

There are no CAN bus or CAN message failures between the TCM and BCM.

Monitored continuously once the conditions are met.

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