Edge AWD V6-3.5L (2009)
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HVAC module
PINPOINT TEST J: THE HVAC MODULE DOES NOT RESPOND TO THE SCAN TOOL
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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J1 CHECK THE HVAC MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
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Ignition OFF.
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Disconnect: HVAC Module C228a.
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Ignition ON.
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Measure the voltage between the HVAC module C228a-13, circuit SBP15 (WH/RD), harness side and ground; and between the HVAC module
C228a-12, circuit CBP37 (WH), harness side and ground.
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Are the voltages greater than 10 volts?
Yes
GO to J2.
No
VERIFY the SJB fuse 15 (10A) or fuse 37 (10A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the Wiring Diagrams to identify
the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
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J2 CHECK THE HVAC MODULE GROUND CIRCUIT FOR AN OPEN
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Ignition OFF.
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Disconnect: Negative Battery Cable.
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Measure the resistance between the HVAC module C228a-23, circuit GD115 (BK/GY), harness side and ground.
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Is the resistance less than 5 ohms?
Yes
GO to J3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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J3 CHECK THE MS-CAN CIRCUITS BETWEEN THE HVAC MODULE AND THE DLC FOR AN OPEN
