Inspection and Verification
- Verify the customer concern.
- Visually inspect for obvious signs of electrical damage. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step. VISUAL INSPECTION CHART Electrical Battery Junction Box (BJB) fuse(s): 17 (40A) (no communication with the ABS module) 21 (10A) (no communication with the PCM) 27 (20A) (no communication with the 4X4 control module) 33 (40A) (no communication with the ABS module) 39 (15A) (no communication with the PCM) Smart Junction Box (SJB) fuse(s): 8 (10A) (no communication with the Restraints Control Module (RCM), Occupant Classification System Module (OCSM)) 9 (5A) (no communication with the Instrument Cluster (IC)) 10 (10A) (no communication with the IC , 4X4 control module) 11 (10A) (no communication with the SJB ) 12 (15A) (no communication with the Satellite Digital Audio Receiver System (SDARS) module) 20 (10A) (no communication with the ABS module) 28 (15A) (no power to the 4X4 control module) 29 (20A) (no power to the scan tool) 33 (5A) (no communication with the IC ) Data Link Connector (DLC) Wiring, terminals or connectors
- Connect the scan tool to the DLC . NOTE: Make sure to use the latest scan tool software release. NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM . If the Integrated Diagnostic System (IDS) does not communicate with the VCM : Check the VCM connection to the vehicle. Check the scan tool connection to the VCM . GO to «PINPOINT TEST K»(ref-365388-S40815722862010070700000) , to diagnose No Power To The Scan Tool.
- Establish a scan tool session. NOTE: The scan tool first attempts to communicate with the PCM, after establishing communication with the PCM, the scan tool then attempts to communicate with all other modules on the vehicle. If an IDS session cannot be established with the vehicle, ( IDS may state "No communication can be established with the PCM"): Choose "NO" when the scan tool prompts whether or not to retry communication. Enter either a PCM part number, tear tag or calibration number to identify the vehicle and start a session (the PCM part number and 4-character tear tag are printed on the PCM label). GO to «PINPOINT TEST A»(ref-365388-S27506994392010070700000) , to diagnose The PCM Does Not Respond To The Scan Tool.
- Carry out the network test. If the network test passes, retrieve and record the continuous memory DTCs and proceed to Step 6. If the network test fails, GO to «SYMPTOM CHART»(ref-365388-S12040622152010070700000) to diagnose the failed communication network. If a module fails to communication during the network test, GO to «SYMPTOM CHART»(ref-365388-S12040622152010070700000) .
- Retrieve and review the DTCs. If the DTCs retrieved are related to the concern, go to «DTC CHARTS»(ref-365388-S24914343152010070700000) . Follow the non-network DTC diagnostics (B-codes, C-codes, P-codes) prior to the network DTC diagnostics (U-codes). For all other DTCs, refer to the Diagnostic Trouble Code (DTC) Chart in «MULTIFUNCTION ELECTRONIC MODULES»(ref-365389) . If no DTCs related to the concern are retrieved, GO to «SYMPTOM CHART»(ref-365388-S12040622152010070700000) .
DTC Charts
Note. Network DTCs (U-codes) are often a result of intermittent concerns such as damaged wiring or low battery voltage occurrences. Additionally, vehicle repair procedures such as module reprogramming often set network DTCs. Replacing a module to resolve a network DTC is unlikely to resolve the concern. To prevent repeat network DTC concerns, inspect all network wiring, especially connectors. Test the vehicle battery, refer to BATTERY, MOUNTING AND CABLES .
Communication Network DTC Chart
Note. DTC U1900 sets in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is not the problem module.
| DTC | Description | Source | Action |
|---|---|---|---|
| U0002 | High Speed CAN Communication Bus Performance | Instrument Cluster (IC) | GO to PINPOINT TEST H . |
| U0100 | Lost Communication With ECM /PCM | 4X4 control module Smart Junction Box (SJB) | The fault is not currently present. CLEAR the DTC. REPEAT the network test with the scan tool. FOLLOW the appropriate pinpoint test for the module which fails the network test. |
| U0102 | Lost Communication With Transfer Case Control Module (4X4CM) | IC | GO to PINPOINT TEST F . |
| U0140 | Lost Communication With Body Control Module ( GEM ) | IC | GO to PINPOINT TEST D . |
| U0151 | Lost Communication With Restraints Control Module | IC | GO to PINPOINT TEST C . |
| U0155 | Lost Communication With Instrument Panel Cluster ( IC ) Control Module | SJB | REFER to EXTERIOR LIGHTING , Daytime Running Lamps (DRL). |
| U0294 | Lost Communication With Powertrain Control Module | IC | GO to PINPOINT TEST A . |
| U1900 | CAN Communication Bus Fault - Receive Error | Occupant Classification System Module (OCSM) Restraints Control Module (RCM) | GO to SYMPTOM CHART for module that failed network test. |
| U2023 | Fault Received From External Node | IC SJB | RETRIEVE and FOLLOW non-network DTCs from other modules. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| U2472 | Unexpected Ignition State | IC | REFER to INSTRUMENTATION AND WARNING CHIMES . |
| U2510 | CAN - Invalid Data For Vehicle Security | IC | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) . |
| U2511 | CAN - Data Mis-Match (Receive Data Does Not Match Expected) | IC | REFER to ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS) . |
COMMUNICATION NETWORK DTC CHART
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| The vehicle does not start with the scan tool connected to the Data Link Connector (DLC) and/or multiple malfunction indicators are only on when the scan tool is connected to the DLC . | Wiring, terminals or connectors Scan tool | GO to PINPOINT TEST K . |
| The PCM does not respond to the scan tool | Fuse Wiring, terminals or connectors PCM | GO to PINPOINT TEST A . |
| The Occupant Classification System Module (OCSM) does not respond to the scan tool | Fuse Wiring, terminals or connectors OCSM | GO to PINPOINT TEST B . |
| The Restraints Control Module (RCM) does not respond to the scan tool | Fuse Wiring, terminals or connectors Case ground open RCM | GO to PINPOINT TEST C . |
| The Smart Junction Box (SJB) does not respond to the scan tool | Fuse Wiring, terminals or connectors SJB | GO to PINPOINT TEST D . |
| The Instrument Cluster (IC) does not respond to the scan tool | Fuse Wiring, terminals or connectors IC | GO to PINPOINT TEST E . |
| The 4X4 control module does not respond to the scan tool | Fuse Wiring, terminals or connectors 4X4 control module | GO to PINPOINT TEST F . |
| The ABS module does not respond to the scan tool | Fuse Wiring, terminals or connectors ABS module | GO to PINPOINT TEST G . |
| Intermittent no High Speed Controller Area Network (HS-CAN) communication, one or more modules are not responding during network test | Wiring, terminals or connectors | GO to PINPOINT TEST H . |
| No High Speed Controller Area Network (HS-CAN) communication, all modules are not responding | Fuse Wiring, terminals or connectors PCM RCM OCSM 4X4 control module IC SJB | GO to PINPOINT TEST I . |
| The Satellite Digital Audio Receiver System (SDARS) module does not communicate with the scan tool or no Medium Speed Controller Area Network (MS-CAN) communication | Fuse Wiring, terminals or connectors SDARS module | GO to PINPOINT TEST J . |
| No power to the scan tool | Fuse Wiring, terminals or connectors DLC Scan tool | GO to PINPOINT TEST K . |
SYMPTOM CHART
Pinpoint Test A: The PCM Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
Scheme 2
Scheme 3
Scheme 4
Scheme 5
Scheme 6
Scheme 7
- A1 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 A2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- A2 VERIFY WHETHER OTHER HS-CAN MODULES PASS THE NETWORK TEST Ignition ON. Enter the following diagnostic mode on the scan tool: Network Test. In the LH pane of the Integrated Diagnostic System (IDS) network test display screen, verify whether any HS-CAN modules passed the network test. Is the text "pass" or a DTC listed next to any of the following modules (if equipped): 4X4 control module, ABS module, Instrument Cluster (IC), Occupant Classification System Module (OCSM), Restraints Control Module (RCM), Smart Junction Box (SJB) or PCM? Yes: If "pass" or a DTC was listed next to the PCM, a network fault is not currently present. GO to «PINPOINT TEST H»(ref-365388-S03145207232010070700000) to diagnose an intermittent HS-CAN fault condition. If "pass" or a DTC was listed next to one or more modules other than the PCM, GO to A3 . No: No modules are currently communicating on the HS-CAN . GO to «PINPOINT TEST I»(ref-365388-S35561579602010070700000) to diagnose no HS-CAN communication.
- A3 CHECK THE PCM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: PCM C175b. Ignition ON. Measure the voltage between the PCM, harness side and ground as follows: VOLTAGE SPECIFICATION PCM Connector-Pin Circuit C175b-35 CBB39 (VT/WH) C175b-36 CBB39 (VT/WH) C175b-45 SBB21 (GY/RD) Are the voltages greater than 10 volts? Yes: GO to A4 . No: VERIFY the Battery Junction Box (BJB) fuses 21 (10A) and 39 (15A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- A4 CHECK THE PCM GROUND CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the PCM, harness side and ground as follows: RESISTANCE SPECIFICATION PCM Connector-Pin Circuit C175b-10 GD108 (BK/VT) C175b-47 GD108 (BK/VT) C175b-48 GD108 (BK/VT) C175b-49 GD108 (BK/VT) C175b-50 GD108 (BK/VT) Are the resistances less than 5 ohms? Yes: GO to A5 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- A5 CHECK THE HS-CAN TERMINATION RESISTANCE 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: CONNECT the negative battery cable. GO to A7 . No: GO to A6 .
- A6 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN Measure the resistance between the PCM C175b-11, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-23, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to A7 . No: REPAIR the circuit in question. CONNECT the negative battery cable.
- A7 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-365395) . 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.
Pinpoint Test B: The Occupant Classification System Module (OCSM) Does Not Communicate With the Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST B: THE OCSM DOES NOT COMMUNICATE WITH THE SCAN TOOL
Note. 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, MOUNTING AND CABLES .
Scheme 8
Scheme 9
Scheme 10
Scheme 11
- B1 CHECK THE OCSM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: OCSM C3159. Ignition ON. Measure the voltage between the OCSM C3159-1, circuit CBP08 (GY/YE), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to B2 . No: VERIFY the Smart Junction Box (SJB) fuse 8 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- B2 CHECK THE GROUND CIRCUIT FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the OCSM C3159-14, circuit GD174 (BK/WH), harness side and ground. Is the resistance less than 5 ohms? Yes: GO to B3 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- B3 CHECK THE HS-CAN CIRCUITS BETWEEN THE OCSM AND THE DLC FOR AN OPEN Measure the resistance between the OCSM C3159-18, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the OCSM C3159-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to B4 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- B4 CHECK FOR CORRECT OCSM OPERATION Disconnect the OCSM connector. Check for: corrosion damaged pins pushed-out pins Connect the OCSM 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 OCSM . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test C: The Restraints Control Module (RCM) Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST C: THE RCM DOES NOT RESPOND TO THE SCAN TOOL
| WARNING | Remove restraint system diagnostic tools from the vehicle prior to road testing. If tools are not removed, the supplemental restraint system (SRS) device may not deploy in a crash. Failure to follow this instruction may result in serious personal injury or death in a crash and possibly violate vehicle safety standards. |
| WARNING | Never probe the electrical connectors on air bag, Safety Canopy® or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death. |
| WARNING | Never disassemble or tamper with safety belt buckle/retractor pretensioners or adaptive load limiting retractors or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors which increases the risk of serious personal injury or death. |
Note. 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, MOUNTING AND CABLES .
Scheme 12
Scheme 13
Scheme 14
- C1 CHECK THE RCM PINS FOR DAMAGE Ignition OFF. Depower the Supplemental Restraint System (SRS). Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . Disconnect: RCM C2041a and C2041b. Inspect the RCM C2041a, harness side and the RCM C2041a, component side, pins 17 and 18 for damage. Are the RCM connector pins 17 and 18 OK? Yes: GO to C2 . No: REPAIR the RCM connector pins as necessary. REPOWER the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CLEAR the DTCs. REPEAT the network test with the scan tool.
- C2 CHECK THE RCM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Deactivate the SRS . Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . Repower the SRS . Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . Ignition ON. Measure the voltage between the RCM C2041b-13, circuit CBP08 (GY/YE), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to C3 . No: VERIFY the Smart Junction Box (SJB) fuse 8 (10A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. REACTIVATE the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CLEAR the DTCs. REPEAT the network test with the scan tool.
- C3 CHECK THE RCM CASE GROUND Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the RCM case and a good sheet metal ground near the RCM . Is the resistance less than 25 ohms? Yes: GO to C4 . No: REPAIR the RCM case ground as necessary. CONNECT the negative battery cable. REACTIVATE the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CLEAR the DTCs. REPEAT the network test with the scan tool.
- C4 CHECK THE HS-CAN CIRCUITS BETWEEN THE RCM AND THE DLC FOR AN OPEN Measure the resistance between the RCM C2041a-10, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the RCM C2041a-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to C5 . No: REPAIR the circuit in question. CONNECT the negative battery cable. REACTIVATE the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CLEAR the DTCs. REPEAT the network test with the scan tool.
- C5 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the RCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new RCM . REACTIVATE the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . 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. REACTIVATE the SRS . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test D: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST D: THE SJB DOES NOT RESPOND TO THE SCAN TOOL
Note. Use the correct probe adapter(s) when taking 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, MOUNTING AND CABLES .
Scheme 15
Scheme 16
Scheme 17
Scheme 18
- D1 CHECK THE SJB FUSE FOR AN OPEN Disconnect: SJB Fuse 11 (10A). Inspect the fuse for an open. Is the fuse open (blown)? Yes: REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool. No: GO to D2 .
- D2 CHECK THE SJB GROUND CIRCUIT FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Disconnect: SJB C2280c. Measure the resistance between the SJB C2280c-1, circuit GD174 (BK/WH), harness side and ground. Is the resistance less than 5 ohms? Yes: GO to D3 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- D3 CHECK THE HS-CAN CIRCUITS BETWEEN THE SJB AND THE DLC FOR AN OPEN Disconnect: SJB C2280d. Measure the resistance between the SJB C2280d-20, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the SJB C2280d-21, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to D4 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- D4 CHECK FOR CORRECT SJB OPERATION Disconnect all the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new SJB . REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-365389) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test E: The Instrument Cluster (IC) Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST E: THE IC DOES NOT RESPOND TO THE SCAN TOOL
Note. 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, MOUNTING AND CABLES .
Scheme 19
Scheme 20
Scheme 21
Scheme 22
- E1 CHECK THE HS-CAN TERMINATION RESISTANCE Ignition OFF. Disconnect: Negative Battery Cable. Disconnect the scan tool cable from the Data Link Connector (DLC). 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 E2 . No: CONNECT the negative battery cable. GO to E4 .
- E2 CHECK THE IC GROUND CIRCUITS FOR AN OPEN Disconnect: IC C220a. Disconnect: IC C220b. Measure the resistance between the IC , harness side and ground as follows: RESISTANCE SPECIFICATION Connector-Pin Circuit C220a-1 GD161 (BK/YE) C220b-3 GD174 (BK/WH) Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to E3 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- E3 CHECK THE IC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Ignition ON. Measure the voltage between the IC , harness side and ground as follows: VOLTAGE SPECIFICATION Connector-Pin Circuit C220b-8 CBP10 (YE/OG) C220b-10 SBP33 (RD) C220b-12 CBP09 (VT/GY) Are the voltages greater than 10 volts? Yes: GO to E4 . No: VERIFY the SJB fuses 9 (5A), 10 (10A) and 33 (5A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- E4 CHECK THE HS-CAN CIRCUITS BETWEEN THE IC AND THE DLC FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the IC C220b-1, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220b-2, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to E5 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- E5 CHECK FOR CORRECT IC OPERATION Disconnect all the IC connectors. Check for: corrosion damaged pins pushed-out pins Connect all the IC connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new IC . REFER to «INSTRUMENTATION AND WARNING CHIMES»(ref-365392) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test F: The 4X4 Control Module Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
Note. 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, MOUNTING AND CABLES .
Scheme 23
Scheme 24
Scheme 25
Scheme 26
- F1 CHECK THE 4X4 CONTROL MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: 4X4 Control Module C281a. Disconnect: 4X4 Control Module C281b. Ignition ON. Measure the voltage between the 4X4 control module, harness side and ground as follows: VOLTAGE SPECIFICATION Connector-Pin Circuit C281a-8 CBP10 (YE/OG) C281b-6 SBB27 (BU/RD) C281b-7 SBP28 (GN/RD) Are the voltages greater than 10 volts? Yes: GO to F2 . No: VERIFY the Battery Junction Box (BJB) fuse 27 (20A) and SJB fuses 10 (10A) and 28 (15A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- F2 CHECK THE 4X4 CONTROL MODULE GROUND CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the 4X4 control module, harness side and ground as follows: RESISTANCE SPECIFICATION Connector-Pin Circuit C281b-10 GD161 (BK/YE) C281b-3 GD174 (BK/WH) Are the resistances less than 5 ohms? Yes: GO to F3 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- F3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE 4X4 CONTROL MODULE FOR AN OPEN Measure the resistance between the 4X4 control module C281a- 10, circuit VDB04 (WH/BU), harness side and the Data Link Connector (DLC) C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the 4X4 control module C281a-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to F4 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- F4 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect all the 4X4 control module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the 4X4 control module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new 4X4 control module. REFER to «FOUR WHEEL DRIVE (4WD) SYSTEMS»(ref-365398) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test G: The ABS Module Does Not Respond To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
Scheme 27
Scheme 28
Scheme 29
Scheme 30
- G1 CHECK THE DLC PINS FOR DAMAGE Ignition OFF. Disconnect the scan tool from the Data Link Connector (DLC). Inspect DLC pins 6 and 14 for damage. Is DLC pins 6 and 14 OK? Yes: GO to G2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- G2 CHECK THE ABS MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Measure the voltage between the ABS module, harness side and ground as follows: VOLTAGE SPECIFICATION Connector-Pin Circuit C135-1 SBB17 (RD) C135-25 SBB15 (WH/RD) C135-35 CBP20 (YE/VT) Are the voltages greater than 10 volts? Yes: GO to G3 . No: VERIFY the Battery Junction Box (BJB) fuses 17 (40A) and 33 (30A) and the SJB fuse 20 (10A) are OK. If OK, REPAIR the circuit in question. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- G3 CHECK THE ABS MODULE GROUND CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: Negative Battery Cable. Measure the resistance between the ABS module, harness side and ground as follows: RESISTANCE SPECIFICATION Connector-Pin Circuit C135-13 GD122 (BK) C135-38 GD122 (BK) Are the resistances less than 5 ohms? Yes: GO to G4 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- G4 CHECK THE HS-CAN CIRCUITS BETWEEN THE ABS MODULE AND THE DLC FOR AN OPEN NOTE: The ABS module must be disconnected for this test step to be accurate. Measure the resistance between the ABS module C135-26, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the ABS module C135-14, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to G5 . No: REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- G5 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect the ABS module connector. Check for: corrosion damaged pins pushed-out pins Connect the ABS 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 ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-365394) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
PINPOINT TEST H: 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, MOUNTING AND CABLES .
Scheme 31
Scheme 32
- H1 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 H2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- H2 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 H3 . No: GO to «PINPOINT TEST I»(ref-365388-S35561579602010070700000) .
- H3 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 negative battery cable. GO to H4 . No: CONNECT the negative battery cable. GO to «PINPOINT TEST I»(ref-365388-S35561579602010070700000) .
- H4 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 H5 .
- H5 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 the IDS . NOTE: When a vehicle is manually identified by a PCM part number, calibration number or tear tag, the IDS does 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 21 (10A) and 39 (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 A»(ref-365388-S27506994392010070700000) . No: INSTALL the removed fuses. GO to H6 .
- H6 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 33 (40A). Disconnect: Smart Junction Box (SJB) Fuse 20 (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 G»(ref-365388-S39534391552010070700000) . No: INSTALL the removed fuses. GO to H7 .
- H7 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 reverts back to the prior run network test results. Disconnect: Smart Junction Box (SJB) Fuse 11 (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 D»(ref-365388-S24948269122010070700000) . No: INSTALL the removed fuse. GO to H8 .
- H8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SJB DISCONNECTED Disconnect: SJB C2280d. Enter the following diagnostic mode on the scan tool: Network Test. Repeat the network test. Do all modules pass the network test? Yes: CONNECT the SJB . GO to «PINPOINT TEST D»(ref-365388-S24948269122010070700000) . No: CONNECT the SJB . GO to H9 .
- H9 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 reverts back to the prior run network test results. Disconnect: IC C220b. 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 E»(ref-365388-S02471497682010070700000) . No: CONNECT the IC . If the vehicle is equipped with a 4X4 control module, GO to H10 . If the vehicle is not equipped with a 4X4 control module, GO to H11 .
- H10 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 reverts back to the prior run network test results. Disconnect: 4X4 Control Module C281a. 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 F»(ref-365388-S14280030962010070700000) . No: CONNECT the 4X4 control module. GO to H11 .
- H11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM AND OCSM 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 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 H12 . No: INSTALL the removed fuse. An intermittent fault is not present. GO to «PINPOINT TEST A»(ref-365388-S27506994392010070700000) .
- H12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCSM 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: Occupant Classification System Module (OCSM) C3159. 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 OCSM . GO to «PINPOINT TEST B»(ref-365388-S20869878902010070700000) . No: CONNECT the OCSM . GO to «PINPOINT TEST C»(ref-365388-S19405888182010070700000) .
Pinpoint Test I: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST I: NO HS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING
Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
Scheme 33
Scheme 34
- I1 CHECK THE DLC PINS FOR DAMAGE Ignition OFF. Disconnect: Negative Battery Cable. Inspect Data Link Connector (DLC) pins 6 and 14 for damage. Are DLC pins 6 and 14 OK? Yes: GO to I2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I2 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 I3 . No: GO to I5 .
- I3 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 negative battery cable. GO to I4 . No: GO to I18 .
- I4 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: The HS-CAN has tested within specifications. GO to «PINPOINT TEST H»(ref-365388-S03145207232010070700000) to test for an intermittent HS-CAN fault condition.
- I5 CHECK THE HS-CAN TERMINATION RESISTOR 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 108 and 132 ohms? Yes: GO to I6 . No: GO to I9 .
- I6 CHECK THE HS-CAN TERMINATION RESISTOR WITH THE PCM DISCONNECTED Disconnect: PCM C175b. 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 108 and 132 ohms? Yes: GO to I7 . No: GO to I8 .
- I7 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN Measure the resistance between the PCM C175b-11, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-23, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to I25 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I8 CHECK THE HS-CAN CIRCUITS BETWEEN THE IC AND THE DLC FOR AN OPEN Disconnect: IC C220b. Measure the resistance between the IC C220b-1, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220b-2, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to I31 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I9 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER 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 less than 5 ohms? Yes: GO to I11 . No: GO to I10 .
- I10 CHECK THE HS-CAN CIRCUITS FOR AN OPEN AT THE DLC 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 greater than 10,000 ohms? Yes: REPAIR the DLC or the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool. No: A capacitor internal to a module may still be draining, causing irregular resistance readings. WAIT 5 minutes. REPEAT the Pinpoint Test.
- I11 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PCM DISCONNECTED Disconnect: PCM C175b. 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 less than 5 ohms? Yes: GO to I12 . No: CONNECT the negative battery cable. GO to I25 .
- I12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C135. 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 less than 5 ohms? Yes: GO to I13 . No: CONNECT the negative battery cable. GO to I26 .
- I13 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SJB DISCONNECTED Disconnect: SJB C2280d. 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 less than 5 ohms? Yes: GO to I14 . No: CONNECT the negative battery cable. GO to I27 .
- I14 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RCM DISCONNECTED Disconnect: RCM C2041a. 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 less than 5 ohms? Yes: GO to I15 . No: CONNECT the negative battery cable. GO to I28 .
- I15 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE OCSM DISCONNECTED Disconnect: OCSM C3159. 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 less than 5 ohms? Yes: If the vehicle is equipped with a 4X4 control module, GO to I16 . If the vehicle is not equipped with a 4X4 control module, GO to I17 . No: CONNECT the negative battery cable. GO to I29 .
- I16 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE 4X4 CONTROL MODULE DISCONNECTED Disconnect: 4X4 Control Module C281a. 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 less than 5 ohms? Yes: GO to I17 . No: CONNECT the negative battery cable. GO to I30 .
- I17 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IC DISCONNECTED Disconnect: IC C220b. 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 less than 5 ohms? Yes: REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool. No: CONNECT the negative battery cable. GO to I31 .
- I18 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PCM DISCONNECTED Disconnect: PCM C175b. 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 negative battery cable. GO to I25 . No: GO to I19 .
- I19 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C135. 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 negative battery cable. GO to I26 . No: GO to I20 .
- I20 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SJB DISCONNECTED Disconnect: SJB C2280d. 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 negative battery cable. GO to I27 . No: GO to I21 .
- I21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM DISCONNECTED Disconnect: RCM C2041a. 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 negative battery cable. GO to I28 . No: GO to I22 .
- I22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCSM DISCONNECTED Disconnect: OCSM C3159. 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 negative battery cable. GO to I29 . No: If the vehicle is equipped with a 4X4 control module, GO to I23 . If the vehicle is not equipped with a 4X4 control module, GO to I24 .
- I23 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE 4X4 CONTROL MODULE DISCONNECTED Disconnect: 4X4 Control Module C281a. 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 negative battery cable. GO to I30 . No: GO to I24 .
- I24 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED Disconnect: IC C220b. 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 negative battery cable. GO to I31 . No: REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I25 CHECK FOR CORRECT PCM OPERATION Disconnect all the PCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PCM connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new PCM. REFER to «ELECTRONIC ENGINE CONTROLS»(ref-365395) . CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool. No: REPAIR the circuit. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I26 CHECK FOR CORRECT ABS MODULE OPERATION Disconnect all of the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all of the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new ABS module. REFER to «VEHICLE DYNAMIC SYSTEMS»(ref-365394) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I27 CHECK FOR CORRECT SJB OPERATION Disconnect all of the SJB connectors. Check for: corrosion damaged pins pushed-out pins Connect all of the SJB connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new SJB . REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-365389) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I28 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the RCM connectors and make sure they seat correctly. Verify the concern is still present. Is the concern still present? Yes: INSTALL a new RCM . REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I29 CHECK FOR CORRECT OCSM OPERATION Disconnect the OCSM connector. Check for: corrosion damaged pins pushed-out pins Connect the OCSM connector and make sure it seats correctly. Verify the concern is still present. Is the concern still present? Yes: INSTALL a new OCSM. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-365409) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I30 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect all of the 4X4 control module connectors. Check for: corrosion damaged pins pushed-out pins Connect all of the 4X4 control module connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new 4X4 control module. REFER to «TRANSFER CASE»(ref-365429) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
- I31 CHECK FOR CORRECT IC OPERATION Disconnect all of the IC connectors. Check for: corrosion damaged pins pushed-out pins Connect all of the IC connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new IC . REFER to «INSTRUMENTATION AND WARNING CHIMES»(ref-365392) . CONNECT all modules. 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. CONNECT all modules. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test J: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To
The Scan Tool, or No Medium Speed Controller Area Network (MS-CAN) Communication
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
PINPOINT TEST J: THE SDARS MODULE DOES NOT RESPOND TO THE SCAN TOOL OR NO MS-CAN COMMUNICATION
Note. 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, MOUNTING AND CABLES .
Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
Scheme 35
Scheme 36
Scheme 37
Scheme 38
Scheme 39
Scheme 40
Scheme 41
Scheme 42
- J1 CHECK THE DLC PINS FOR DAMAGE Ignition OFF. Disconnect the scan tool from the Data Link Connector (DLC). Inspect DLC pins 3 and 11 for damage. Are DLC pins 3 and 11 OK? Yes: GO to J2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J2 CHECK THE MS-CAN TERMINATION RESISTANCE Ignition OFF. Disconnect: Negative Battery Cable. Disconnect the scan tool cable from the DLC . 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 J5 . No: GO to J3 .
- J3 CHECK THE MS-CAN TERMINATION RESISTOR 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 108 and 132 ohms? Yes: GO to J9 . No: GO to J4 .
- J4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER 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 less than 5 ohms? Yes: GO to J10 . No: GO to J9 .
- J5 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 5,000 ohms? Yes: GO to J6 . No: GO to J12 .
- J6 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the vehicle battery. 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. Are the voltages greater than 6 volts? Yes: REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool. No: GO to J7 .
- J7 CHECK THE SDARS MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Ignition OFF. Disconnect: SDARS Module C2358. Ignition ON. Measure the voltage between the SDARS module C2358-9, circuit SBP12 (GN/RD), harness side and ground. Are the voltages greater than 10 volts? Yes: GO to J8 . No: VERIFY the Smart Junction Box (SJB) fuse 12 (15A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J8 CHECK THE SDARS MODULE GROUND CIRCUITS FOR AN OPEN Ignition OFF. Measure the resistance between the SDARS module C2358-3, circuit GD103 (BK/BU), harness side and ground. Are the resistances less than 5 ohms? Yes: GO to J14 . No: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J9 CHECK THE CAN CIRCUITS BETWEEN THE DLC AND THE SDARS MODULE FOR AN OPEN Measure the resistance between the SDARS module C2358-1, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SDARS module C2358-7, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side. Are the resistances less than 5 ohms? Yes: CONNECT the negative battery cable. GO to J15 . No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J10 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C175b. 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 less than 5 ohms? Yes: GO to J11 . No: CONNECT the negative battery cable. GO to J15 .
- J11 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE AUDIO UNIT (ACM) DISCONNECTED Disconnect: Audio Unit ( ACM ) C290c. 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 less than 5 ohms? Yes: REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool. No: CONNECT the negative battery cable. GO to J16 .
- J12 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C2358. 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 5,000 ohms? Yes: CONNECT the negative battery cable. GO to J15 . No: GO to J13 .
- J13 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE AUDIO UNIT (ACM) DISCONNECTED Disconnect: Audio Unit ( ACM ) C290c. 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 5,000 ohms? Yes: CONNECT the negative battery cable. GO to J16 . No: REPAIR the circuit. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO UNIT (ACM) DISCONNECTED Disconnect: Audio Unit ( ACM ) C290c. Enter the following diagnostic mode on the scan tool: Network Test. Repeat the network test. Is CAN communication restored to the SDARS MODULE? Yes: CONNECT the audio unit ( ACM ). CONNECT the negative battery cable. GO to J16 . No: CONNECT the audio unit ( ACM ). CONNECT the negative battery cable. GO to J15 .
- J15 CHECK FOR CORRECT SDARS MODULE OPERATION Disconnect the SDARS module connector. Check for: corrosion damaged pins pushed-out pins Connect the SDARS 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 SDARS module. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-365434) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
- J16 CHECK FOR CORRECT AUDIO UNIT (ACM) OPERATION Disconnect all the audio unit ( ACM ) connectors. Check for: corrosion damaged pins pushed-out pins Connect all the audio unit ( ACM ) connectors and make sure they seat correctly. Operate the system and verify the concern is still present. Is the concern still present? Yes: INSTALL a new audio unit ( ACM ). REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-365434) . 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. CLEAR the DTCs. REPEAT the network test with the scan tool.
Pinpoint Test K: No Power To The Scan Tool
Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.
Note. Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test.
Note. Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .
Scheme 43
Scheme 44
Scheme 45
- K1 CHECK THE DLC PINS FOR DAMAGE Disconnect the scan tool from the DLC . Inspect DLC pins 4, 5 and 16 for damage. Are DLC pins 4, 5 and 16 OK? Yes: GO to K2 . No: REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
- K2 CHECK THE DLC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Measure the voltage between the DLC C251-16, circuit SBP29 (GY/RD), harness side and ground. Is the voltage greater than 10 volts? Yes: GO to K3 . No: VERIFY the Smart Junction Box (SJB) fuse 29 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the «SYSTEM WIRING DIAGRAMS»(ref-360990) to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool.
- K3 CHECK THE DLC GROUND CIRCUITS FOR AN OPEN Disconnect: Negative Battery Cable. Measure the resistance between the DLC C251-4, circuit GD161 (BK/YE), harness side and ground; and between the DLC C251-5, circuit GD174 (BK/WH), harness side and ground. Are the resistances less than 5 ohms? Yes: REPAIR the scan tool. CONNECT the negative battery cable. REPEAT the network test with the scan tool. No: REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.