Expedition 2WD V8-5.4L (2009)
network test with the scan tool.
-------------------------------------------------
Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool
Communications Network
Pinpoint Tests
Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information. See: Diagrams/Electrical Diagrams/Diagrams By
Number
Normal Operation
The ABS module communicates with the scan tool through the High Speed Controller Area Network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN
+) and VDB05 (WH) (HS-CAN -) provide the network connection to the ABS module. Voltage for the ABS module is provided by circuit CBB52
(GN/WH) and ground is provided by circuit GD120 (BK/GN).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
ABS module
PINPOINT TEST B: THE ABS 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.
-------------------------------------------------
B1 CHECK THE ABS MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: ABS Module C135.
-
Ignition ON.
-
Measure the voltage between the ABS module C135-1, circuit SBB69 (GY/RD), C135-8, circuit CBB52 (GN/WH), and C135-32, circuit SBB68
(GN/RD), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to B2.
No
VERIFY the Battery Junction Box (BJB) fuses 52 (10A), 68 (60A) and 69 (60A) are OK. If OK, REPAIR the circuit. 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.
-------------------------------------------------
