Fusion FWD V6-3.0L (2009)
PINPOINT TEST I: 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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I1 CHECK THE HVAC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN
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Ignition OFF.
-
Disconnect: HVAC Module C228a (Single-Zone) or C2356a (Dual-Zone).
-
Ignition ON.
-
Measure the voltage between the HVAC module C228a-26 (single-zone) or C2356a-26 (dual-zone), circuit SBP07 (WH/RD) or circuit CBP20
(YE/VT), harness side and ground.
-
Measure the voltage between the HVAC module C228a-19 (single-zone) or C2356a-19 (dual-zone), circuit CBP20 (YE/VT), harness side and
ground.
-
Are the voltages greater than 10 volts?
Yes
GO to I2.
No
VERIFY Smart Junction Box (SJB) fuse 13 (7.5A) or 27 (7.5A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network
test with the scan tool. If not OK, REFER to the
Wiring Diagrams to identify the possible causes of the circuit short.
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I2 CHECK THE HVAC GROUND CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the HVAC module C228a-1 (single-zone) or C2356a-1 (dual-zone), circuit GD116 (BK/VT) and ground.
-
Is the resistance less than 5 ohms?
Yes
GO to I3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
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