Test Step 1 - Verify the DTC is Active

• Turn the ignition ON.
• With the scan tool, erase A/C heater control DTCs.
• Turn the ignition OFF, wait 10 seconds, and turn the ignition ON.
• With the scan tool, read A/C heater control DTCs.

Does the scan tool display this DTC as active?

Yes

• Go to TEST STEP 2 - CHECK REAR BLOWER CONTROL 5 VOLT SOURCE CIRCUIT FOR A SHORT TO VOLTAGE .

No

• Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
• Perform the HVAC Verification Test. Refer to HVAC .