Expedition 2WD V8-5.4L (2009)
PINPOINT TEST O: THE RETM 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.
-------------------------------------------------
O1 CHECK THE RETM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: RETM C949.
-
Ignition ON.
-
Measure the voltage between the RETM C949-16, circuit SBP03 (BU/RD), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to O2.
No
VERIFY the SJB fuse 3 (15A) is 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.
-------------------------------------------------
O2 CHECK THE RETM GROUND CIRCUIT FOR AN OPEN
-
Ignition OFF.
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the RETM C949-1, circuit GD114 (BK/BU), harness side and ground.
-
Is the resistance less than 5 ohms?
Yes
GO to O3.
No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
O3 CHECK THE MS-CAN CIRCUITS BETWEEN THE RETM AND THE DLC FOR AN OPEN
-
Measure the resistance between the RETM C949-8, circuit VDB06 (GY/OG), harness side and the Data Link Connector (DLC) C251-3, circuit
VDB06 (GY/OG), harness side.
