Component Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Static Testing
- Ignition OFF, remove the MAIN MOD solenoid from the valve body. Refer to Control Valve Solenoid Replacement (SS1, SS2, SS3, TCC, and MAIN MOD) or Control Valve Solenoid Replacement (PCS1 and PCS2) .
- Test for an open circuit between the B+ circuit terminal A of the MAIN MOD solenoid and the MAIN MOD solenoid metal case and between the control circuit terminal B and the MAIN MOD solenoid metal case.
- If not within the specified range, replace the MAIN MOD solenoid.
- Test for resistance between the control circuit terminal B, and the B+ circuit terminal A of the MAIN MOD solenoid. Refer to Temperature Versus Resistance (Transmission Fluid Temperature Sensor)
or Temperature Versus Resistance (Speed Sensor)
or Temperature Versus Resistance (Solenoid)
.
- If not within the specified range, replace the MAIN MOD solenoid.
NOTE:
You must perform the Circuit/System Testing first.