Explorer 4WD V6-4.0L (2009)
Pinpoint Tests
Pinpoint Test P: The Accessory Protocol Interface Module (APIM) 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
Normal Operation
The Accessory Protocol Interface Module (APIM) 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 HS-CAN connection to the APIM. Circuits VDB06 (GY/OG)
(MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the MS-CAN connection to the APIM. Voltage for the APIM is provided by circuit SBB41
(RD). Circuit GD114 (BK/BU) provides ground.
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
APIM
PINPOINT TEST P: THE APIM 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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P1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
-
Disconnect: APIM C3342.
-
Ignition ON.
-
Measure the voltage between the APIM C3342-1, circuit SBB41 (RD), harness side and ground.
-
Is the voltage greater than 10 volts?
Yes
GO to P2.
No
VERIFY the BJB fuse 41 (15A) is OK. If OK, REPAIR the circuit in question. 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.
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P2 CHECK THE APIM GROUND CIRCUITS FOR AN OPEN
-
Ignition OFF.
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the APIM C3342-37, circuit GD114 (BK/BU), harness side and ground; and between the APIM C3342-38, circuit
GD114 (BK/BU), harness side and ground.
