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.
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HOMESERVICE MANUALSCHEVROLET2013CORVETTE BASE, 2D CONVERTIBLE, STANDARD TRANS, TRANS MFR CD 6L85M/MM6REPAIR AND DIAGNOSIS (SINGLE PAGE)EXTERNAL PAGESDIFFERENT CARSECTION 176 (AUTOMATIC TRANSMISSION - 4L60-E/4L65-E/4L70-E - DTC P0218 TO DTC P2771)DTC P0562 OR P0563CIRCUIT/SYSTEM TESTING
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6
Circuit/System Testing
2013 Chevrolet Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6SECTION Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Start the engine and observe the Ignition Voltage parameter with a scan tool. The Ignition Voltage parameter should be between 12-14.5 volts.
- If the voltage is not within the specified range, refer to Charging System Test .
- Increase the engine speed to 1,500 RPM. The Ignition Voltage parameter should remain between 12-14.5 volts.
- If the voltage is not within the specified range when the engine speed is increased, refer to Charging System Test .
- Turn OFF the ignition. Disconnect the TCM connector. Probe the battery positive voltage and the ignition 1 voltage circuits of the TCM connector with the ground probe of the DMM. Connect the positive lead of the DMM to the battery positive terminal. Turn ON the ignition, with the engine OFF. Measure the voltage drop for each circuit. The voltage drop should be less than 0.5 volts.
- If the voltage drop is greater than 0.5 volts, repair the high resistance in the affected circuit.
- Turn OFF the ignition. Using the positive probe of the DMM, probe the ground circuits of the TCM connector. Connect the negative lead of the DMM to the battery ground terminal. Observe and record the voltage measurements. The voltage drop should be less than 0.2 volts.
- If the voltage drop is greater than 0.2 volts, repair the open or high resistance in the affected circuit.
- If all circuits and connections test normal, replace the TCM.
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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.