Pinpoint Test R: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittently
Communications Network
Pinpoint Tests
Pinpoint Test R: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, Communication Can Be Intermittently Established
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). In the event that 1 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.
- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM)
- Instrument Cluster (IC)
- Occupant Classification System Module (OCSM)
- PCM
- Power Steering Control Module (PSCM)
- Restraints Control Module (RCM)
- Battery Control Module (BCM) (Hybrid only)
- Transmission Control Module (TCM) (Hybrid only)
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
PINPOINT TEST R: INTERMITTENT NO HS-CAN COMMUNICATION, COMMUNICATION CAN BE INTERMITTENTLY ESTABLISHED
NOTE: Various modules will set network DTCs during this test procedure. Clear the DTCs from all modules after the diagnostic procedure is complete.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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R1 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 R2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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R2 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.
- Is the resistance between 54 and 66 ohms?
Yes
GO to R3.
No
Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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R3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.
- Are the resistances greater than 1,000 ohms?
Yes
CONNECT the battery negative cable. GO to R4.
No
Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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R4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition ON.
- Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), 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 R5.
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R5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED
NOTE: An Integrated Diagnostic System (IDS) session must be established prior to disabling the PCM in this test step. If the PCM has failed communication during multiple attempts to identify the vehicle, first identify the vehicle manually by entering a PCM part number, calibration number or tear tag when prompted by IDS.
NOTE: When a vehicle is manually identified by a PCM part number, calibration number or tear tag, the IDS will not automatically run a network test. The network test must be manually selected and run.
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: Battery Junction Box (BJB) Fuses 5 (10A) and 29 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
- Do all other modules pass the network test?
Yes
Go To Pinpoint Test A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
No
For Escape Hybrid and Mariner Hybrid, INSTALL the removed fuses. GO to R6.
For Escape and Mariner, INSTALL the removed fuses. GO to R7.
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R6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE BCM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: BJB Fuses 26 (20A) and 8 (10A).
- 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 fuse. Go To Pinpoint Test I. Pinpoint Test I: The Battery Control Module (BCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to R7.
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R7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PSCM AND 4X4 CONTROL MODULE (IF EQUIPPED) DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuse 35 (10A).
- Enter the following diagnostic mode on the scan tool: Network Test.
- Repeat the network test.
- Do all other modules pass the network test?
Yes
If the vehicle is not equipped with a 4X4 control module, INSTALL the removed fuses. Go To Pinpoint Test G. Pinpoint Test G: The Power Steering Control Module (PSCM) Does Not Respond To The Scan Tool
If the vehicle is equipped with a 4X4 control module, INSTALL the removed fuses. GO to R8.
No
INSTALL the removed fuse. GO to R9.
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R8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 4X4 CONTROL MODULE DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: 4X4 Control Module C3184.
- 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 4x4 control module. Go To Pinpoint Test C. Pinpoint Test C: The 4X4 Control Module Does Not Respond To The Scan Tool
No
CONNECT the 4x4 control module. Go To Pinpoint Test G. Pinpoint Test G: The Power Steering Control Module (PSCM) Does Not Respond To The Scan Tool
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R9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuse 31 (10A).
- 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 fuse. Go To Pinpoint Test E. Pinpoint Test E: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to R10.
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R10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCSM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuse 46 (7.5A).
- 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 fuse. Go To Pinpoint Test F. Pinpoint Test F: The Occupant Classification System Module (OCSM) Does Not Respond To The Scan Tool
No
GO to R11.
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R11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuses 26 (10A), 29 (5A) and 43 (10A).
- 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. Go To Pinpoint Test D. Pinpoint Test D: The Instrument Cluster (IC) Does Not Respond To The Scan Tool
No
If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), INSTALL the removed fuses. GO to R12.
If the vehicle is not equipped with an APIM, INSTALL the removed fuses. GO to R13.
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R12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuse 3 (15A).
- 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 fuse. Go To Pinpoint Test P. Pinpoint Test P: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
No
GO to R13.
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R13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: SJB Fuse 34 (5A) (Escape and Mariner) or Fuse 27 (10A) (Hybrid).
- 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 fuse. Go To Pinpoint Test B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool
No
If the vehicle is not a Hybrid Electric Vehicle (HEV), INSTALL the removed fuse. An intermittent fault is not present. Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
If the vehicle is an HEV, INSTALL the removed fuse. GO to R14.
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R14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HEV TCM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results.
- Disconnect: BJB Fuses 5 (10A) and 24 (10A).
- 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. Go To Pinpoint Test H. Pinpoint Test H: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. An intermittent fault is not present. Go To Pinpoint Test S. Pinpoint Test S: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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