Pinpoint Test S: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Respo
Communications Network
Pinpoint Tests
Pinpoint Test S: Intermittent No Medium Speed Controller Area Network (MS-CAN) Communication, One Or More Modules Are Not Responding During Network Test
Normal Operation
The Medium Speed Controller Area Network (MS-CAN) uses an unshielded twisted pair cable, circuits VDB06 (GY/OG) and VDB07 (VT/OG).
The following modules communicate on the MS-CAN:
- Accessory Protocol Interface Module (APIM) (if equipped)
- Audio Control Module (ACM)
- Audio Digital Signal Processing (DSP) module (if equipped)
- Driver Seat Module (DSM) (if equipped)
- Driver Door Module (DDM) (if equipped)
- Dual Climate Controlled Seat Module (DCSM) (if equipped)
- HVAC module (if equipped)
- Instrument Cluster (IC)
- Parking Aid Module (PAM) (if equipped)
- Satellite Digital Audio Receiver System (SDARS) module (if equipped)
- Smart Junction Box (SJB)
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 S: INTERMITTENT NO MS-CAN COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
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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S1 CHECK THE DLC PINS FOR DAMAGE
- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 3 and 11 for damage.
- Are DLC pins 3 and 11 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 MS-CAN TERMINATION RESISTANCE
- Disconnect: Negative Battery Cable.
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side.
- Is the resistance between 54 and 66 ohms?
Yes
GO to S3.
No
Go To Pinpoint Test Q.
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S3 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), harness side and ground.
- Are the resistances greater than 1,000 ohms?
Yes
GO to S4.
No
Go To Pinpoint Test Q.
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S4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable.
- Ignition ON.
- Measure the voltage between the DLC C251-3, circuit VDB06 (GY/OG), harness side and ground; and between the DLC C251-11, circuit VDB07 (VT/OG), 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 S5.
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S5 VERIFY VEHICLE EQUIPMENT - DSM
- Inspect the vehicle for a Driver Seat Module (DSM).
- Is the vehicle equipped with a DSM?
Yes
GO to S6.
No
GO to S7.
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S6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DSM 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: Battery Junction Box (BJB) Fuse 15 (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 O. Pinpoint Test O: The Driver Seat Module (DSM) Does Not Respond to the Scan Tool
No
INSTALL the removed fuse. GO to S7.
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S7 VERIFY VEHICLE EQUIPMENT - DDM AND/OR SDARS MODULE
- Inspect the vehicle for a Driver Door Module (DDM) and/or Satellite Digital Audio Receiver System (SDARS) module.
- Is the vehicle equipped with a DDM, SDARS module, or both?
Yes
GO to S8.
No
GO to S10.
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S8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM AND/OR SDARS 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: Smart Junction Box (SJB) Fuse 20 (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. For vehicles equipped with both a DDM and SDARS module, GO to S9.
For vehicles equipped with a DDM only, Go To Pinpoint Test N. Pinpoint Test N: The Driver Door Module (DDM) Does Not Respond to the Scan Tool
For vehicles equipped with a SDARS module only, Go To Pinpoint Test M. Pinpoint Test M: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond to the Scan Tool
No
INSTALL the removed fuse. GO to S10.
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S9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DDM 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: DDM C568b.
- 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 DDM. Go To Pinpoint Test N. Pinpoint Test N: The Driver Door Module (DDM) Does Not Respond to the Scan Tool
No
CONNECT the DDM. Go To Pinpoint Test M. Pinpoint Test M: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond to the Scan Tool
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S10 VERIFY VEHICLE EQUIPMENT - HVAC MODULE
- Inspect the vehicle for a HVAC module.
- Is the vehicle equipped with a HVAC module?
Yes
GO to S11.
No
GO to S13.
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S11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH AND HVAC 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 13 (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 I. Pinpoint Test I: The HVAC Module Does Not Respond to the Scan Tool
No
GO to S12.
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S12 VERIFY VEHICLE EQUIPMENT - APIM
- Inspect the vehicle for a Accessory Protocol Interface Module (APIM).
- Is the vehicle equipped with an APIM?
Yes
GO to S13.
No
GO to S14.
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S13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM 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: Battery Junction Box (BJB) Fuse 13 (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 S14.
No
CONNECT the HVAC module. Go To Pinpoint Test Q. Pinpoint Test Q: The Accessory Protocol Interface Module (APIM) Does Not Respond to the Scan Tool
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S14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC 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: Instrument Cluster (IC) C220.
- 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 IC. Go To Pinpoint Test G. Pinpoint Test G: The Instrument Cluster (IC) Does Not Respond to the Scan Tool
No
GO to S15.
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S15 VERIFY VEHICLE EQUIPMENT - DCSM
- Inspect the vehicle for a Dual Climate Controlled Seat Module (DCSM).
- Is the vehicle equipped with a DCSM?
Yes
GO to S16.
No
GO to S17.
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S16 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DCSM 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 11 (30A) and 12 (30A).
- 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 P. Pinpoint Test P: The Dual Climate Controlled Seat Module (DCSM) Does Not Respond to the Scan Tool
No
GO to S17.
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S17 VERIFY VEHICLE EQUIPMENT - AUDIO DSP MODULE
- Inspect the vehicle for an audio Digital Signal Processing (DSP) module.
- Is the vehicle equipped with an audio DSP module?
Yes
GO to S17.
No
GO to S18.
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S18 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO DSP 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: BJB Fuses 20 (20A) and 21 (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 L. Pinpoint Test L: The Audio Digital Signal Processing (DSP) Module Does Not Respond to the Scan Tool
No
GO to S19.
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S19 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB 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 Fuse 19 (40A).
- 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 H. Pinpoint Test H: The Smart Junction Box (SJB) Does Not Respond to the Scan Tool
No
GO to S20.
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S20 VERIFY VEHICLE EQUIPMENT - PAM
- Inspect the vehicle for a Parking Aid Module (PAM).
- Is the vehicle equipped with a PAM?
Yes
GO to S21.
No
GO to S22.
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S21 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PAM 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 28 (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 J. Pinpoint Test J: The Parking Aid Module (PAM) Does Not Respond to the Scan Tool
No
GO to S22.
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S22 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 13 (7.5A), 23 (7.5A) and 27 (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 fuses. Go To Pinpoint Test G. Pinpoint Test G: The Instrument Cluster (IC) Does Not Respond to the Scan Tool
No
INSTALL the removed fuses. GO to S23.
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S23 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM 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 12 (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 K. Pinpoint Test K: The Audio Control Module (ACM) Does Not Respond to the Scan Tool
No
INSTALL the removed fuse. GO to S24.
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S24 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM 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: ACM C240c (Base Audio/Audiophile) or C290c (THX(R) Audio/Navigation).
- 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 ACM. Go To Pinpoint Test K. Pinpoint Test K: The Audio Control Module (ACM) Does Not Respond to the Scan Tool
No
CONNECT the ACM. An intermittent fault is not present. Go To Pinpoint Test Q. Pinpoint Test Q: The Accessory Protocol Interface Module (APIM) Does Not Respond to the Scan Tool
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