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 P0961CIRCUIT/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.
- Disconnect the AT inline 20-way connector. Install the J 44152
jumper harness (20 pins), on the transmission side on the connector. See Special Tools
. Using the J 35616
GM-approved terminal test kit, measure the resistance between the PC solenoid high control circuit and the PC solenoid low control circuit. The resistance should be between 3-7 ohms.
- If the resistance is greater than 7 ohms, test the PC solenoid high control circuit or the PC solenoid low control circuit for an open or a faulty PC solenoid valve.
- If the resistance is less than 3 ohms, test for the PC solenoid high control circuit and the PC solenoid low control circuit shorted together of a faulty PC solenoid valve.
- Measure the resistance between the PC solenoid high control circuit and the transmission case. Measure the resistance between the PC solenoid low control circuit and the transmission case. The resistance should be greater than 250K ohms.
- If the resistance is less than 250K ohms, replace the automatic transmission wiring harness assembly.
- Measure the resistance between the PC solenoid high control circuit and all other circuits of the J 44152
except the PC solenoid low control circuit. See Special Tools
. Measure the resistance between the PC solenoid low control circuit and all other circuits of the J 44152
except the PC solenoid high control circuit. See Special Tools
. The resistance should be greater than 250K ohms.
- If the resistance is less than 250K ohms, replace the automatic transmission wiring harness assembly.
- Remove the J 44152
from the transmission side and install on the engine side of the harness. See Special Tools
. Disconnect the TCM connector. Using the J 35616
, measure the resistance of the PC solenoid high control circuit between the TCM connector and the AT inline 20-way connector. Measure the resistance of the PC solenoid low control circuit between the TCM connector and the AT inline 20-way connector. The resistance should be less than 250 ohms for each circuit.
- If the value is greater than 250 ohms, repair the open in the affected circuit.
- Measure the resistance between the PC solenoid high control circuit and ground. Measure the resistance between the PC solenoid low control circuit and ground. The resistance for each circuit should be greater than 250K ohms.
- If the value is less than 250K ohms, repair the short to ground in the affected circuit.
- Reconnect the TCM connector. Turn ON the ignition with the engine OFF. Test the PC solenoid high control circuit and the PC solenoid low control circuit for a short to voltage.
- If a short to voltage condition is found, repair as necessary.
- If all circuits/connections test normal, test or replace the PC solenoid valve.
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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.