Module Communications Network: Diagnosis Ford Focus II рестайлинг

Inspection and Verification

1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage. VISUAL INSPECTION CHART Electrical Battery junction box (BJB) fuse(s): 5 (10A) (no communication with PCM) 28 (15A) (no communication with PCM) 35 (10A) (no communication with PCM) Smart junction box (SJB) fuse(s): 3 (15A) (no communication with satellite digital audio receiver system [SDARS] module) 5 (10A) (no communication with SJB) 13 (5A) (no communication with accessory protocol interface module [APIM]) 15 (10A) (no communication with HVAC module) 26 (10A) (no communication with instrument cluster [IC]) 28 (5A) (no communication with audio control module [ACM]) 29 (5A) (no communication with IC) 31 (10A) (no communication with ABS module) 32 (10A) (no communication with restraints control module [RCM]) 37 (10A) (no communication with HVAC module) 39 (20A) (no communication with ACM, front controls interface module [FCIM], front display interface module [FDIM]) 43 (10A) (no communication with IC) 46 (7.5A) (no communication with occupant classification system module [OCSM]) Data link connector (DLC) Wiring, terminals or connectors
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the scan tool to the DLC. If the scan tool 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 Q»(ref-357141-S20178508782010030800000) , to diagnose no power to the scan tool.
5. 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-357141-S34395414712010030800000) to identify the module not communicating.
6. If the DTCs retrieved are related to the concern, go to «DTC Charts»(ref-357141-S12600534832010030800000) . For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(ref-357142) .
7. If no DTCs related to the concern are retrieved, go to «Symptom Chart»(ref-357141-S34395414712010030800000) .

DTC Charts

Note. Network DTCs (U-codes) are often a result of intermittent concerns such as faulty wiring or low battery voltage occurrences. Additionally, vehicle service procedures such as module reprogramming will 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 .

Note. DTCs listed as "on-demand" set during the scan tool on-demand self-test. On-demand DTCs are hard fault (always present) conditions. DTCs listed as "continuous" are continuous memory DTCs (CMDTCs) which are set when a fault is present during normal module operation. These DTCs may either be intermittently present (which will clear) or may be hard-fault (always present) conditions.

COMMUNICATION NETWORK DTC CHART

Symptom Chart

SYMPTOM CHART

Pinpoint Test A: The PCM Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Electronic Engine Controls, 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.

Scheme 5

Scheme 6

Scheme 7

1. A1 POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS (PC/ED) MANUAL PINPOINT TEST QA VERIFICATION CHECK Verify that pinpoint test QA has been carried out. Has pinpoint test QA been carried out? YES : Go to A2 . NO : REFER to the appropriate INTRODUCTION- GASOLINE MODELS article, pinpoint test QA, to diagnose no communication with the PCM.
2. A2 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground cable. Measure the resistance between the data link connector (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 A4 . NO : Go to A3 .
3. A3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Disconnect: PCM C175b Measure the resistance between the PCM C175b-59, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-43, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to A4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. A4 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-357164) . CONNECT the battery ground cable. 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 the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test B: The ABS Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Vehicle Dynamic Systems, 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.

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

1. B1 CHECK THE ABS MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: ABS Module C135 Key in ON position. Measure the voltage between the ABS module, harness side and ground as follows: Vehicles Without Stability Control Connector-Pin Circuit C135-1 SBB18 (YE/RD) C135-14 SBB09 (RD) C135-20 CBP31 (BU/OG) Vehicles With Stability Control Connector-Pin Circuit C155-32 SBB18 (YE/RD) C155-1 SBB09 (RD) C155-8 CBP31 (BU/OG) Are the voltages greater than 10 volts? YES: Go to B2. NO: VERIFY the battery junction box (BJB) fuse 18 (20A) and fuse 9 (40A) and the smart junction box (SJB) fuse 31 (10A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. B2 CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ABS module C135-26, circuit GD122 (BK), harness side and ground. Is the resistance less than 5 ohms? YES: Go to B3. NO: REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. B3 CHECK THE HS-CAN CIRCUITS BETWEEN THE ABS MODULE AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the ABS module C135-23, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the ABS module C135-21, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. For vehicles with stability control, measure the resistance between the ABS module C155-12, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. (Scheme 9): Checking HS-CAN Circuit VDB04 (WH/BU) Between ABS Module & Data Link Connector For An Open For vehicles with stability control, measure the resistance between the ABS module C155-13, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. (Scheme 10): Checking HS-CAN Circuit VDB05 (WH) Between ABS Module & Data Link Connector For An Open Are the resistances less than 5 ohms? YES: Go to B4. NO: REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. B4 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-357152). 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 C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Instrument Cluster, 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.

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

Scheme 18

1. C1 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground 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 C2 . NO : Go to C4 .
2. C2 CHECK THE IC VOLTAGE SUPPLY CIRCUITS Disconnect: IC C220 Connect the battery ground cable. Key in ON position. Measure the voltage between the IC, harness side and ground as follows: Connector-Pin Circuit C220-6 CBP43 (GY) C220-19 SBP26 (YE/RD) C220-20 CBP29 (WH/VT) Are the voltages greater than 10 volts? YES : Go to C3 . NO : VERIFY the SJB fuses 26 (10A), 29 (5A) or 43 (10A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. C3 CHECK THE IC GROUND CIRCUITS Key in OFF position. Measure the resistance between the IC, harness side and ground as follows: Connector-Pin Circuit C220-9 GD134 (BK/VT) C220-10 GD138 (BK/WH) Are the resistances less than 5 ohms? YES : Go to C5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. C4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE IC FOR AN OPEN Measure the resistance between the IC C220-15, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-14, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to C5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. C5 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE IC FOR AN OPEN Measure the resistance between the IC C220-1, circuit VDB07 (VT/OG), harness side and the DLC C251-6, circuit VDB07 (VT/OG), harness side. Measure the resistance between the IC C220-2, circuit VDB06 (GY/OG), harness side and the DLC C251-14, circuit VDB06 (GY/OG), harness side. Are the resistances less than 5 ohms? YES : Go to C6 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
6. C6 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC 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 IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-357146) . 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 D: The Occupant Classification System Module (OCSM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Supplemental Restraint System, 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.

Scheme 19

Scheme 20

Scheme 21

Scheme 22

1. D1 CHECK THE OCSM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: OCSM C3285 Key in ON position. Measure the voltage between the OCSM C3285-1, circuit CBX02 (BN/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to D2 . NO : VERIFY the smart junction box (SJB) fuse 46 (7.5A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. D2 CHECK THE OCSM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the OCSM C3285-14, circuit GD901 (BK), harness side and ground. Is the resistance less than 5 ohms? YES : Go to D3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. D3 CHECK THE HS-CAN CIRCUITS BETWEEN THE OCSM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the OCSM C3285-18, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the OCSM C3285-9, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to D4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. D4 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-357180) . 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 Restraints Control Module (RCM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Supplemental Restraint System, for schematic and connector information.

Note. The supplemental restraint system (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

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 23

Scheme 24

Scheme 25

1. E1 CHECK THE RCM CONNECTION Key in OFF position. Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-357180) . Disconnect: RCM C2041a Disconnect: RCM C2041b Are RCM C2041a and C2041b pins OK? YES : REPOWER the SRS. Go to E2 . NO : REPAIR the RCM connector pins as necessary. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-357180) . CLEAR the DTCs. REPEAT the network test with the scan tool.
2. E2 CHECK THE RCM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in ON position. Measure the voltage between the RCM C2041a-12, circuit CBP46 (WH/BU), harness side and ground. Is the voltage greater than 10 volts? YES : Go to E3 . NO : VERIFY the smart junction box (SJB) fuse 32 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. E3 CHECK THE RCM CASE GROUND FOR AN OPEN Key in OFF position. Measure the resistance between the metal RCM case and a good chassis ground. Is the resistance less than 5 ohms? YES : Go to E4 . NO : REPAIR the case ground connection. the DTCs. REPEAT the network test with the scan tool.
4. E4 CHECK THE HS-CAN CIRCUITS BETWEEN THE RCM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the RCM C2041b-18, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the RCM C2041b-17, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to E5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. E5 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. 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 Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, 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.

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Scheme 30

Scheme 31

1. F1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Disconnect: APIM C2298 Key in ON position. Measure the voltage between the APIM C2298-1, circuit SBP13 (GY/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F2 . NO : VERIFY the smart junction box (SJB) fuse 13 (5A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. F2 CHECK THE APIM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the APIM C2298-37, circuit GD114 (BK/BU), harness side and ground; and between the APIM C2298-38, circuit GD114 (BK/BU), harness side and ground. Are the resistances less than 5 ohms? YES : Go to F3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. F3 CHECK THE HS-CAN CIRCUITS BETWEEN THE APIM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the APIM C2298-53, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the APIM C2298-54, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to F4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. F4 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE APIM FOR AN OPEN Measure the resistance between the APIM C2298-16, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the APIM C2298-17, 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 : Go to F5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. F5 CHECK FOR CORRECT APIM OPERATION Disconnect all the APIM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the APIM 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 APIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . 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 Front Controls Interface Module (FCIM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Audio System, 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.

Scheme 32

Scheme 33

Scheme 34

Scheme 35

1. G1 CHECK THE FCIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: FCIM C2402 Key in ON position. Measure the voltage between the FCIM C2402-1, circuit SBP39 (WH/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to G2 . NO : VERIFY the SJB fuse 39 (20A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. G2 CHECK THE FCIM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the FCIM C2402-2, circuit GD134 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to G3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. G3 CHECK THE MS-CAN CIRCUITS BETWEEN THE FCIM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the FCIM C2402-3, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the FCIM C2402-4, 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 : Go to G4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. G4 CHECK FOR CORRECT FCIM OPERATION Disconnect the FCIM connector. Check for: corrosion damaged pins pushed-out pins Connect the FCIM 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 FCIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . 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: The Front Display Interface Module (FDIM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Audio System, 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.

Scheme 36

Scheme 37

Scheme 38

Scheme 39

1. H1 CHECK THE FDIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: FDIM C2123 Key in ON position. Measure the voltage between the FDIM C2123-12, circuit SBP39 (WH/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to H2 . NO : VERIFY the SJB fuse 39 (20A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. H2 CHECK THE FDIM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the FDIM C2123-8, circuit GD134 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to H3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. H3 CHECK THE MS-CAN CIRCUITS BETWEEN THE FDIM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the FDIM C2123-4, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the FDIM C2123-5, 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 : Go to H4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. H4 CHECK FOR CORRECT FDIM OPERATION Disconnect the FDIM connector. Check for: corrosion damaged pins pushed-out pins Connect the FDIM 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 FDIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . 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 I: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Audio System, 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.

Scheme 40

Scheme 41

Scheme 42

Scheme 43

1. I1 CHECK THE SDARS MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: SDARS Module C4252 Key in ON position. Measure the voltage between the SDARS module C4252-9, circuit SBP03 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to I2 . NO : VERIFY the SJB fuse 3 (15A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. I2 CHECK THE SDARS MODULE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the SDARS module C4252-3, circuit GD110 (BK/WH), harness side and ground. Is the resistance less than 5 ohms? YES : Go to I3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. I3 CHECK THE MS-CAN CIRCUITS BETWEEN THE SDARS MODULE AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the SDARS module C4252-1, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SDARS module C4252-7, 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 : Go to I4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. I4 CHECK FOR CORRECT SDARS MODULE OPERATION Disconnect all the SDARS module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the SDARS 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 SDARS module. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . 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 J: The Smart Junction Box (SJB) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Grounds, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Power Distribution/SJB, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, 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.

Scheme 44

Scheme 45

Scheme 46

1. J1 CHECK THE SJB FUSE FOR VOLTAGE Key in OFF position. NOTE: Measurements are taken with the fuses installed. Measure the voltage between the SJB fuse 5 (10A) and ground. Is the voltage greater than 10 volts? YES : Go to J2 . NO : VERIFY the SJB fuse 5 (10A) is OK. If OK, go to J4 .
2. J2 CHECK THE SJB GROUND CIRCUITS FOR AN OPEN Disconnect: SJB C2280d Measure the resistance between the SJB, harness side and ground as follows: Connector-Pin Circuit C2280d-8 GD133 (BK) C2280d-12 GD133 (BK) Are the resistances less than 5 ohms? YES : Go to J3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. J3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE SJB FOR AN OPEN Disconnect: SJB C2280b Measure the resistance between the SJB C2280b-37, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280b-38, 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 : Go to J4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. J4 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-357142) . 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: The Audio Control Module (ACM) Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Audio System, 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.

Scheme 47

Scheme 48

Scheme 49

Scheme 50

1. K1 CHECK THE ACM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: ACM C240a Key in ON position. Measure the voltage between the ACM C240a-1, circuit SPB39 (WH/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to K2 . NO : VERIFY the SJB fuse 39 (20A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. K2 CHECK THE ACM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ACM C240a-13, circuit GD114 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to K3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. K3 CHECK THE MS-CAN CIRCUITS BETWEEN THE ACM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Disconnect: ACM C240b Measure the resistance between the ACM C240b-15, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the ACM C240b-16, 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 : Go to K4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. K4 CHECK FOR CORRECT ACM OPERATION Disconnect all the ACM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the 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 ACM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . 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 L: The HVAC Module Does Not Respond To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, 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.

Scheme 51

Scheme 52

Scheme 53

Scheme 54

1. L1 CHECK THE HVAC MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: HVAC Module C2357a Key in ON position. Measure the voltage between the HVAC module C2357a-12, circuit CBP37 (WH), harness side and ground; and between the HVAC module C2357a-13, circuit SBP15 (WH/RD), harness side and ground. Are the voltages greater than 10 volts? YES : Go to L2 . NO : VERIFY the SJB fuse 15 (10A) or fuse 37 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. L2 CHECK THE HVAC MODULE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the HVAC module C2357a-23, circuit GD138 (BK/WH), harness side and ground. Is the resistance less than 5 ohms? YES : Go to L3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. L3 CHECK THE MS-CAN CIRCUITS BETWEEN THE HVAC MODULE AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the HVAC module C2357a-25, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the HVAC module C2357a-26, 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 : Go to L4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. L4 CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect all the HVAC module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the HVAC 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 HVAC module. REFER to «CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS»(ref-357136) . 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 M: INTERMITTENT NO MEDIUM SPEED CONTROLLER AREA NETWORK (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 DTCs from all modules after the diagnostic procedure is completed.

Scheme 55

Scheme 56

Scheme 57

Scheme 58

1. M1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect DLC pins 3 and 11 for damage. Are DLC pins 3 and 11 OK? YES : Go to M2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. M2 CHECK THE MS-CAN TERMINATION RESISTANCE NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground 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 M3 . NO : Go to «Pinpoint Test N»(ref-357141-S16076910612010030800000) .
3. M3 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 M4 . NO : Go to «Pinpoint Test N»(ref-357141-S16076910612010030800000) .
4. M4 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. 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 M5 .
5. M5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ACM DISABLED NOTE: When re-running the network test, the network test application must be closed first or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 28 (5A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S14123832452010030800000) . NO : INSTALL the removed fuse. Go to M6 .
6. M6 VERIFY VEHICLE EQUIPMENT - SDARS MODULE Inspect the vehicle for a SDARS module. Is the vehicle equipped with a SDARS module? YES : Go to M7 . NO : Go to M8 .
7. M7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE 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: SJB Fuse 3 (15A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S28932245472010030800000) . NO : INSTALL the removed fuse. Go to M8 .
8. M8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE SMART JUNCTION BOX (SJB) DISABLED NOTE: When re-running the network test, the network test application must be closed first or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 5 (10A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S20675536272010030800000) . NO : INSTALL the removed fuse. Go to M9 .
9. M9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED NOTE: When re-running the network test, the network test application must be closed first 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 diagnostic 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»(ref-357141-S22525183792010030800000) . NO : INSTALL the removed fuses. Go to M10 .
10. M10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISCONNECTED Disconnect: IC C220 Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : CONNECT the IC. Go to «Pinpoint Test C»(ref-357141-S22525183792010030800000) . NO : CONNECT the IC. An intermittent fault is not present. Go to «Pinpoint Test K»(ref-357141-S14123832452010030800000) .

Pinpoint Test N: No Medium Speed Controller Area Network (MS-CAN) Communication, All Modules Are Not Responding

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, 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.

Scheme 59

Scheme 60

1. N1 CHECK DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the Pinpoint Test. Key in OFF position. Disconnect the scan tool cable from the DLC. Inspect the DLC pins 3 and 11 for damage. Are DLC pins 3 and 11 OK? YES : Go to N2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. N2 CHECK THE MS-CAN TERMINATION RESISTANCE NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground 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 N5 . NO : Go to N3 .
3. N3 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 N7 . NO : Go to N4 .
4. N4 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 N8 . NO : Go to N7 .
5. N5 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 N6 . NO : Go to N17 .
6. N6 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. 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 : VERIFY all module fuses are OK. If OK, REPEAT the network test with the scan tool.
7. N7 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE SJB FOR AN OPEN Disconnect: SJB C2280b Measure the resistance between the SJB C2280b-37, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280b-38, 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 : VERIFY all module fuses are OK. If OK, CONNECT the SJB. CONNECT the battery ground cable. REPEAT the network test with the scan tool. NO : REPAIR the circuit in question. CONNECT the SJB. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
8. N8 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SJB DISCONNECTED Disconnect: SJB C2280b 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 N9 . NO : Go to N24 .
9. N9 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IC DISCONNECTED Disconnect: IC C220 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 N10 . NO : Go to N27 .
10. N10 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ACM DISCONNECTED Disconnect: ACM C240b 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 N11 . NO : Go to N28 .
11. N11 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C2357a 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 N12 . NO : Go to N29 .
12. N12 VERIFY VEHICLE OPTION CONTENT - SDARS MODULE CIRCUIT SHORT TOGETHER TEST Verify vehicle option content. Is the vehicle equipped with a SDARS module? YES : Go to N13 . NO : Go to N14 .
13. N13 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C4252 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 N14 . NO : Go to N30 .
14. N14 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE FDIM DISCONNECTED Disconnect: FDIM C2123 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 N15 . NO : Go to N31 .
15. N15 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE FCIM DISCONNECTED Disconnect: FCIM C2402 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 N16 . NO : Go to N32 .
16. N16 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C2298 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 circuits. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to N33 .
17. N17 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SJB DISCONNECTED Disconnect: SJB C2280b 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 10,000 ohms? YES : Go to N26 . NO : Go to N18 .
18. N18 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ACM DISCONNECTED Disconnect: ACM C240b 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 10,000 ohms? YES : Go to N27 . NO : Go to N19 .
19. N19 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED Disconnect: IC C220 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 10,000 ohms? YES : Go to N28 . NO : Go to N20 .
20. N20 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C2357a 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 10,000 ohms? YES : Go to N29 . NO : Go to N21 .
21. N21 VERIFY VEHICLE OPTION CONTENT - SDARS MODULE CIRCUIT SHORT TO GROUND TEST Verify vehicle option content. Is the vehicle equipped with a SDARS module? YES : Go to N22 . NO : Go to N23 .
22. N22 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C4252 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 10,000 ohms? YES : Go to N30 . NO : Go to N23 .
23. N23 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE FDIM DISCONNECTED Disconnect: FDIM C2123 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 10,000 ohms? YES : Go to N30 . NO : Go to N24 .
24. N24 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE FCIM DISCONNECTED Disconnect: FCIM C2402 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 10,000 ohms? YES : Go to N25 . NO : If the vehicle is equipped with an APIM, go to N32 . If the vehicle is not equipped with an APIM, REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
25. N25 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C2298 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 10,000 ohms? YES : Go to N33 . NO : REPAIR the circuit in question. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
26. N26 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-357142) . CONNECT the battery ground cable. 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 the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
27. N27 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC 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 IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-357146) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
28. N28 CHECK FOR CORRECT ACM OPERATION Disconnect all the ACM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the 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 ACM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
29. N29 CHECK FOR CORRECT HVAC MODULE OPERATION Disconnect all the HVAC module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the HVAC 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 HVAC module. REFER to «CLIMATE CONTROL»(ref-357171) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
30. N30 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-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
31. N31 CHECK FOR CORRECT FDIM OPERATION Disconnect the FDIM connector. Check for: corrosion damaged pins pushed-out pins Connect the FDIM 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 FDIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
32. N32 CHECK FOR CORRECT FCIM OPERATION Disconnect the FCIM connector. Check for: corrosion damaged pins pushed-out pins Connect the FCIM 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 FCIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
33. N33 CHECK FOR CORRECT APIM OPERATION Disconnect the APIM connector. Check for: corrosion damaged pins pushed-out pins Connect the APIM 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 APIM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

PINPOINT TEST O: INTERMITTENT NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST

Note. Various modules will set network DTCs during this test procedure. Clear DTCs from all modules after the diagnostic procedure is completed.

Scheme 61

Scheme 62

Scheme 63

1. O1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE Key in OFF position. 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 O2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. O2 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground 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 O3 . NO : Go to «Pinpoint Test P»(ref-357141-S20515919482010030800000) .
3. O3 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 : Go to O4 . NO : Go to «Pinpoint Test P»(ref-357141-S20515919482010030800000) .
4. O4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. 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. 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 O5 .
5. O5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED NOTE: An 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 closed first or the screen display will revert back to the prior run network test results. Disconnect: Battery Junction Box (BJB) Fuses 5 (10A), 28 (15A) and 35 (10A) Enter the following diagnostic mode on the diagnostic 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-357141-S35479506042010030800000) . NO : INSTALL the removed fuses. Go to O6 .
6. O6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISABLED NOTE: When re-running the network test, the network test application must be closed first or the screen display will revert back to the prior run network test results. Disconnect: BJB Fuse 31 (10A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S40483200252010030800000) . NO : INSTALL the removed fuse. Go to O7 .
7. O7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISABLED NOTE: When re-running the network test, the network test application must be closed first 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 diagnostic 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»(ref-357141-S22525183792010030800000) . NO : INSTALL the removed fuses. Go to O8 .
8. O8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE IC DISCONNECTED Disconnect: IC C220 Enter the following diagnostic mode on the diagnostic tool: Network Test Repeat the network test. Do all other modules pass the network test? YES : CONNECT the IC. Go to «Pinpoint Test C»(ref-357141-S22525183792010030800000) . NO : CONNECT the IC. Go to O9 .
9. O9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISABLED NOTE: When re-running the network test, the network test application must be closed first or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 32 (10A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S37300442822010030800000) . NO : INSTALL the removed fuse. Go to O10 .
10. O10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE OCSM DISABLED NOTE: When re-running the network test, the network test application must be closed first 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 diagnostic 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-357141-S23813121852010030800000) . NO : INSTALL the removed fuse. Go to O11 .
11. O11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISABLED NOTE: When re-running the network test, the network test application must be closed first or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 13 (5A) Enter the following diagnostic mode on the diagnostic 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»(ref-357141-S32773740612010030800000) . NO : INSTALL the removed fuse. An intermittent fault is not present. Go to «Pinpoint Test N»(ref-357141-S16076910612010030800000) .

Pinpoint Test P: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Electronic Engine Controls, 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.

Scheme 64

Scheme 65

1. P1 CHECK THE DATA LINK CONNECTOR (DLC) PINS FOR DAMAGE NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Key in OFF position. 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 P2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. P2 CHECK THE HS-CAN TERMINATION RESISTANCE Key in OFF position. NOTE: Failure to disconnect the battery will result in false resistance readings. Disconnect the battery ground 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 P3 . NO : Go to P5 .
3. P3 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 : Go to P4 . NO : Go to P18 .
4. P4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE Connect the battery ground cable. Key in ON position. 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 «Pinpoint Test o»(ref-357141-S39943870442010030800000) .
5. P5 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 P6 . NO : Go to P9 .
6. P6 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 P7 . NO : Go to P8 .
7. P7 CHECK THE CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN Measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to P25 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
8. P8 CHECK THE HS-CAN CIRCUITS BETWEEN THE IC AND THE DLC FOR AN OPEN Disconnect: IC C220 Measure the resistance between the IC C220-15, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-14, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to P28 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
9. P9 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 P11 . NO : Go to P10 .
10. P10 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN Disconnect: PCM C175b Measure the resistance between the PCM C175b-59, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the PCM C175b-43, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances less than 5 ohms? YES : Go to «Pinpoint Test O»(ref-357141-S01068392052010030800000) . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
11. P11 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 P12 . NO : Go to P25 .
12. P12 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 P13 . NO : Go to P26 .
13. P13 VERIFY VEHICLE EQUIPMENT - APIM Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to P14 . NO : Go to P15 .
14. P14 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C2298 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 P15 . NO : Go to P27 .
15. P15 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IC DISCONNECTED Disconnect: IC C220 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 P16 . NO : Go to P28 .
16. P16 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RCM DISCONNECTED Disconnect: RCM C2041b 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 P17 . NO : Go to P29 .
17. P17 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE OCSM DISCONNECTED Disconnect: OCSM C3285 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 battery. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to P30 .
18. P18 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 : Go to P25 . NO : Go to P19 .
19. P19 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 : Go to P26 . NO : Go to P20 .
20. P20 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to P21 . NO : Go to P22 .
21. P21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C2298 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances greater than 1,000 ohms? YES : Go to P27 . NO : Go to P22 .
22. P22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE IC DISCONNECTED Disconnect: IC C220 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 : Go to P28 . NO : Go to P23 .
23. P23 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM DISCONNECTED Disconnect: RCM C2041b 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 : Go to P29 . NO : Go to P24 .
24. P24 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCSM DISCONNECTED Disconnect: OCSM C3285 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 : Go to P30 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
25. P25 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-357164) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
26. P26 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-357152) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
27. P27 CHECK FOR CORRECT APIM OPERATION Disconnect the APIM connector. Check for: corrosion damaged pins pushed-out pins Connect the APIM 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 APIM module. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(ref-357169) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
28. P28 CHECK FOR CORRECT IC OPERATION Disconnect the IC connector. Check for: corrosion damaged pins pushed-out pins Connect the IC 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 IC. REFER to «INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES»(ref-357146) . CONNECT all modules. CONNECT the battery ground cable. 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. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
29. P29 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-357180) . CONNECT all modules. CONNECT the battery. 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. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
30. P30 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-357180) . CONNECT all modules. CONNECT the battery. 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. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test Q: No Power To The Scan Tool

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Module Communications Network, for schematic and connector information.