Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Pinpoint Test L: DTC U1016 - SCP Invalid Data Powertrain Control Module: Overview
Test Step
- L1 CHECK THE RECORDED DTCS FROM THE POWERTRAIN CONTROL MODULE (PCM)
- Use the recorded results from the PCM self-test.
- Are any DTCs recorded?
Result / Action to Take
- Yes
: For PXXX codes, REFER to the INTRODUCTION
article in ENGINE PERFORMANCE
.
For all other codes, REFER to MODULE COMMUNICATIONS NETWORK - LS .
- No : GO to L2.
- L2 MONITOR THE PCM REVERSE INPUT
- Enter the following diagnostic mode on the diagnostic tool: PCM PID Monitor.
- Monitor the transmission range (TR) sensor PID.
- Place the selector lever in REVERSE.
- Does the TR sensor PID indicate correctly?
- Yes : GO to L3.
- No : REFER to AUTOMATIC TRANSMISSION - 5R55S to continue diagnosis of the input.
- L3 CHECK THE REVERSE SIGNAL INPUT
- Press and hold the AUDIO and MENU buttons for 5 seconds.
- Press 917 Enter.
- Select Navigation Info.
- Select Vehicle Signals.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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