Component Testing
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
Static Test
- Ignition/Vehicle - Off
- Disconnect the electrical connector: Q12 Evaporative Emission Purge Solenoid Valve
- Test for 10 to 30 ohms between the test points: Control terminal 2/B & Ignition terminal 1/A
- If not between 10 and 30 ohms
Replace the component: Q12 Evaporative Emission Purge Solenoid Valve
- Go to next step: If between 10 and 30 ohms
- If not between 10 and 30 ohms
- Test for infinite resistance between the test points: Each terminal of the component & The component's housing
- If less than infinite resistance
Replace the component: Q12 Evaporative Emission Purge Solenoid Valve
- Go to next step: If infinite resistance
- If less than infinite resistance
- All OK.
Dynamic Test
- Ignition/Vehicle - Off
- Disconnect the electrical connector: Q12 Evaporative Emission Purge Solenoid Valve
- Connect a 3 A fused jumper wire between the test points: Ignition terminal 1/A & 12 V
- Momentarily connect a jumper wire between the test points: Control terminal 2/B & Ground
Verify the component turns On and Off when connecting and disconnecting the jumper wire: Q12 Evaporative Emission Purge Solenoid Valve
- If the component does not turn On and Off
Replace the component: Q12 Evaporative Emission Purge Solenoid Valve
- Go to next step: If the component turns On and Off
- If the component does not turn On and Off
- All OK.
CAUTION:
Complete the testing as quickly as possible in order to prevent overheating and damaging the component.