B10A5-LEFT BLEND DOOR CONTROL CIRCUIT OPEN (ATC)
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
When actuator movement is requested.
- Set Condition:
If the (C255) Left Blend Door Driver circuit or the (C55) Left Blend Door Common Driver circuit is open.
| Possible Causes |
| (C255) LEFT BLEND DOOR DRIVER CIRCUIT OPEN |
| (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT OPEN |
| LEFT BLEND DOOR ACTUATOR |
| A/C HEATER CONTROL |
Diagnostic Test
1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCsTurn the ignition on.
With the scan tool, read active HVAC DTCs.
Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE DTCs?
Yes
- Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of HVAC related symptoms.
No
- Go To 2
2. CHECK THE LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE
Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Measure the resistance between the (C255) Left Blend Door Driver circuit and the (C55) Left Blend Door Common Driver circuit in the A/C Heater Control C2 harness connector.
Is the resistance above 70.0 ohms?
Yes
- Go To 3
No
- Replace the A/C Heater Control in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
3. CHECK THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT FOR AN OPEN
Disconnect the Left Blend Door Actuator harness connector.
Measure the resistance of the (C255) Left Blend Door Driver circuit between the Left Blend Door Actuator harness connector and the A/C Heater Control C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
- Go To 4
No
- Repair the (C255) Left Blend Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
4. CHECK THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT FOR AN OPEN
Measure the resistance of the (C55) Left Blend Door Common Driver circuit between the Left Blend Door Actuator harness connector and the A/C Heater Control C2 harness connector.
Is the resistance below 5.0 ohms?
Yes
- Replace the Left Blend Door Actuator in accordance with the Service Information.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
No
- Repair the (C55) Left Blend Door Common Driver circuit for an open.
- Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).