Blend Circuit Shorted To Ground (MTC)

BLEND CIRCUIT SHORTED TO GROUND (MTC)





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
When the Actuator Circuit Test is executed.

- Set Condition:
This message will set if the A/C Heater Control detects a short low on the Passenger Blend Door Driver circuit.





1. ACTIVE HVAC DTC(S) PRESENT
Turn the ignition on.
Using the scan tool, clear all HVAC DTC's.
Using the A/C Heater Control, operate the Passenger Blend Door Actuator.
With the scan tool, check for DTCs.
Does the scan tool display this DTC as active?

Yes

- Go To2

No

- The condition that caused this symptom is currently not present. 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. Repair as necessary.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. (C33) PASSENGER BLEND DOOR DRIVER CIRCUIT SHORTED LOW




Turn the ignition off.
Disconnect the A/C Heater Control C1 harness connector.
Disconnect the Passenger Blend Door Actuator harness connector.
Measure the resistance between ground and the (C33) Passenger Blend Door Driver circuit.
Does the ohm meter read open circuit?

Yes

- Go To3

No

- Repair the (C33) Passenger Blend Door Driver circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

3. PASSENGER BLEND DOOR ACTUATOR SHORTED
NOTE: When test is complete clear all HVAC codes.

Reconnect A/C Heater Control C1 harness connector.
Turn the ignition on.
With the scan tool, check for DTCs.
Does the scan tool display this DTC as active?

Yes

- Replace the A/C Heater Control.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Replace the Passenger Blend Door Actuator.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.�