Pinpoint Test S: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Respond
Communications Network
Pinpoint Tests
Pinpoint Test S: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Trailer Brake Control (TBC) module (if equipped)
- PCM
- Restraints Control Module (RCM)
- Auxiliary Heater Control Module (AHCM) (diesel engine only, if equipped)
- Transmission Control Module (TCM) (diesel engine only, if equipped)
- Electronic Variable Response Turbocharger (EVRT) actuator (diesel engine only)
- Instrument Cluster (IC)
In the event that either High Speed Controller Area Network (HS-CAN) circuit become open to any 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 S: INTERMITTENT NO HS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
NOTE: Various modules 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.
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S1 CHECK THE DLC PINS FOR DAMAGE
- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 6 and 14 for damage.
- Are DLC pins 6 and 14 OK?
Yes
GO to S2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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S2 CHECK THE HS-CAN TERMINATION RESISTANCE
- Ignition OFF.
- 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 S3.
No
GO to Pinpoint Test R. Pinpoint Test R: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
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S3 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 5,000 ohms?
Yes
CONNECT the negative battery cable. GO to S4.
No
GO to Pinpoint Test R. Pinpoint Test R: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
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S4 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 short to voltage. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
GO to S5.
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S5 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 reverts back to the prior run network test results.
- Disconnect: Battery Junction Box (BJB) Fuses 71 (5A) and 76 (20A).
- 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 A. Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to S6.
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S6 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 reverts back to the prior run network test results.
- Disconnect: BJB Fuse 77 (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 B. Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool
No
If the vehicle is equipped with a TBC module, INSTALL the removed fuse. GO to S7.
If the vehicle is not equipped with a TBC module, INSTALL the removed fuse. GO to S8.
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S7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TBC MODULE DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: TBC Module.
- 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 TBC module. GO to Pinpoint Test D. Pinpoint Test D: The Trailer Brake Control (TBC) Module Does Not Respond To The Scan Tool
No
CONNECT the TBC module. GO to S8.
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S8 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 reverts back to the prior run network test results.
- Disconnect: SJB Fuse 32 (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
If the vehicle is equipped with an APIM, INSTALL the removed fuse. GO to S9.
If the vehicle is not equipped with an APIM, INSTALL the removed fuse. GO to S10.
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S9 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 reverts back to the prior run network test results.
- Disconnect: SJB Fuse 40 (20A).
- 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 Q. Pinpoint Test Q: No ISO 9141 Communication Or The 4X4 Control Module Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to S10.
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S10 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 reverts back to the prior run network test results.
- Disconnect: SJB Fuse 26 (10A) and 36 (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 fuses. GO to Pinpoint Test C. Pinpoint Test C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool
No
If the vehicle is equipped with a diesel engine, INSTALL the removed fuses. GO to S11.
If the vehicle is not equipped with a diesel engine, INSTALL the removed fuses. An intermittent fault is not present. GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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S11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE EVRT ACTUATOR DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: BJB Fuse 74 (20A).
- 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. REFER to Computers and Control Systems Information, Pinpoint Tests, pinpoint test AK to diagnose no communication with the EVRT actuator.
No
If the vehicle is equipped with a TCM, INSTALL the removed fuse. GO to S12.
If the vehicle is not equipped with a TCM, INSTALL the removed fuse. GO to S13.
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S12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TCM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: BJB Fuses 37 (10A) and 72 (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 fuses. GO to Pinpoint Test G. Pinpoint Test G: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuses. GO to S13.
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S13 VERIFY VEHICLE EQUIPMENT - AHCM
- Inspect the vehicle for an AHCM. This module is present on some diesel engine equipped vehicles.
- Is the vehicle equipped with an AHCM?
Yes
GO to S14.
No
GO to S15.
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S14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AHCM DISABLED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: SJB Fuse 37 (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 F. Pinpoint Test F: The Auxiliary Heater Control Module (AHCM) Does Not Respond To The Scan Tool
No
INSTALL the removed fuse. GO to S15.
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S15 VERIFY VEHICLE EQUIPMENT - TELEMATICS MODULE
- Inspect the vehicle for a telematics module. This module is present on some diesel engine equipped vehicles.
- Is the vehicle equipped with a telematics module?
Yes
GO to S16.
No
An intermittent fault is not present. GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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S16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TELEMATICS MODULE DISCONNECTED
NOTE: When re-running the network test, the network test application must be first closed or the screen display reverts back to the prior run network test results.
- Disconnect: Telematics Module C2409.
- 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 telematics module. GO to S17.
No
CONNECT the telematics module. An intermittent fault is not present. GO to Pinpoint Test T. Pinpoint Test T: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
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S17 CHECK FOR CORRECT TELEMATICS MODULE OPERATION
- Disconnect the telematics module connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the telematics module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes
INSTALL a new telematics module. REFER to Accessories and Optional Equipment. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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