Pinpoint Test C: U0140:00 - HVAC (Heating, Ventilation And Air Conditioning) Control Module

C1 CHECK THE COMMUNICATION NETWORK
- Ignition ON.
- Using a diagnostic scan tool, perform the network test.
Does the BCM pass the network test?
- Yes : GO to C2
- No : DIAGNOSE the no communication with the BCM .
  REFER to: COMMUNICATIONS NETWORK .
C2 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
- Using a diagnostic scan tool, perform the HVAC control module self-test.
- Retrieve and record all HVAC control module Diagnostic Trouble Codes (DTCs).
- Clear the Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 10 seconds.
- Repeat the HVAC control module self-test.
- Retrieve and record all HVAC control module Diagnostic Trouble Codes (DTCs).
Is DTC U0140:00 retrieved again?
- Yes : If DTC U3006:16 or U3006:17 is also retrieved, GO to PINPOINT TEST S
  If DTC U3006:16 or U3006:17 is not retrieved, GO to C3
- No : The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
C3 RETRIEVE ANY DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE BCM (BODY CONTROL MODULE) SELF-TEST
- Using a diagnostic scan tool, perform the BCM self-test.
- Check for retrieved Diagnostic Trouble Codes (DTCs) from the BCM self-test.
Is DTC U3003:16 or U3003:17 retrieved?
- Yes : REFER to: BODY CONTROL MODULE (BCM) .
- No : GO to C4
C4 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0140:00 SET IN OTHER MODULES
- Clear all Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Wait 10 seconds.
- Ignition ON.
- Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Is DTC U0140:00 set in any other modules?
- Yes : INSTALL a new BCM .
  REFER to: BODY CONTROL MODULE (BCM) .
- No : INSTALL a new HVAC control module.
  REFER to: HEATING, VENTILATION AND AIR CONDITIONING (HVAC) CONTROL MODULE .