Explorer Sport Trac 2WD V6-4.0L (2009)
Communications Network
Pinpoint Tests
Pinpoint Test T: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not
Responding During Network Test
Normal Operation
An open circuit VDB04 (WH/BU) (HS-CAN +) or VDB05 (WH) (HS-CAN -) may cause intermittent or unreliable communication to all modules on the
HS-CAN. The HS-CAN is used for communication between the following modules:
-
4X4 control module (if equipped)
-
ABS module
-
Accessory Protocol Interface Module (APIM) (if equipped)
-
Instrument Cluster (IC)
-
Occupant Classification System Module (OCSM)
-
PCM
-
Restraints Control Module (RCM)
-
Transmission Control Module (TCM) (6R60 transmission only)
In the event that one of the 2 network circuits (HS-CAN + or HS-CAN -) becomes open to a module on the network, unreliable network communication
to all modules on the network may result.
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
PINPOINT TEST T: INTERMITTENT NO HS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING
DURING NETWORK TEST
NOTE: Various modules will set network DTCs during this test procedure. Clear DTCs from all modules after the diagnostic procedure is completed.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
-------------------------------------------------
T1 CHECK THE DLC PINS FOR DAMAGE
-
Ignition OFF.
-
Disconnect the scan tool cable from the DLC.
-
Inspect DLC pins 6 and 14 for damage.
-
Are DLC pins 6 and 14 OK?
Yes
GO to T2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
T2 CHECK THE HS-CAN TERMINATION RESISTANCE
-
Disconnect: Negative Battery Cable.
-
Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness
side.