F 150 2WD Pickup V8-5.4L SOHC VIN 5 (2004)
If one of the bus wires becomes shorted to ground or voltage, or if some but not all termination resistors are lost, communications can continue. Check
circuits 1827 (WH/LG) and 1828 (PK/LG) between the instrument cluster C220a and the DLC C251. Total resistance values must not be more than 5
ohms. If the resistance is more than 5 ohms there is an open in circuit 1827 (WH/LG) and 1828 (PK/LG), damage to the DLC C251, damage to the
instrument cluster C220a, or a problem with the in-line connector.
Possible Causes
-
circuit 1827 (WH/LG) shorted to ground or open
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circuit 1828 (PK/LG) shorted to ground or open
-
in-line connector
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DLC C251
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instrument cluster C220a
-
instrument cluster
Test G
PINPOINT TEST G: THE ELECTRONIC AUTOMATIC TEMPERATURE CONTROL (EATC) MODULE DOES NOT RESPOND TO THE
DIAGNOSTIC TOOL
Test G1-G3
Normal Operation
The EATC module communicates with the diagnostic tool through the UART based protocol (UBP) communications network circuit 1906 (VT). If
circuit 1906 (VT) becomes open or shorted to ground communications to that module will not be possible. Check circuit 1906 (VT) between the
EATC C294c and the DLC C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in
circuit 1906 (VT), damage to the DLC C251, damage to the EATC C294c, or a problem in the in-line connector.
Possible Causes
-
circuit 1906 (VT) shorted to ground or open
-
in-line connector
