Navigator 4WD V8-5.4L (2010)
No
CONNECT the negative battery cable. GO to Pinpoint Test W. See: Pinpoint Test W: No Medium Speed Controller Area Network (MS-CAN)
Communication, All Modules Are Not Responding
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V4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
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Ignition ON.
-
Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07
(VT/OG), harness side and ground.
-
Is the voltage greater than 6 volts?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to V5.
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V5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE AND GPSM DISABLED
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Disconnect: SJB Fuses 15 (10A) and 37 (10A).
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Enter the following diagnostic mode on the scan tool: Network Test.
-
Repeat the network test.
-
Do all other modules pass the network test?
Yes
INSTALL the removed fuses. If the vehicle is equipped with a Global Positioning System Module (GPSM), GO to V6.
If the vehicle is not equipped with a GPSM, GO to Pinpoint Test I. See: Pinpoint Test I: The HVAC Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to V7.
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V6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HVAC MODULE DISCONNECTED
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Disconnect: HVAC module C2357a EMTC or C228a EATC.
-
Enter the following diagnostic mode on the scan tool: Network Test.
-
Repeat the network test.
-
Do all other modules pass the network test?
Yes
CONNECT the HVAC module. GO to Pinpoint Test I. See: Pinpoint Test I: The HVAC Module Does Not Respond To The Scan Tool
No
