Module Communications Network Ford Explorer Sport Trac II

Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).

Vehicle communication utilizes both medium and high speed controller area network (CAN) communications. CAN is used for many modules to communicate with each other on a common network. CAN in-vehicle networking, is a method for transferring data among distributed electronic modules via serial data bus. Without serial networking, intermodule communication requires dedicated, point to point wiring resulting in bulky, expensive, complex, and difficult to install wiring harnesses. Applying a serial data network reduces the number of wires, combining the signals on a single network. Information is sent to the individual control modules that control each function.

The vehicle has 2 module communication networks

1. Medium speed (MS) CAN
2. High speed (HS) CAN

Both networks are connected to the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one scan tool to be able to diagnose and control any module on both networks from one connector. The DLC can be found under the instrument panel between the steering column and the audio unit.

Scheme 1

MS-CAN Operation

The MS-CAN communicates using bussed messages. The MS-CAN has an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.

The MS-CAN is a medium speed communication network used for the following modules

1. SJB
2. Accessory protocol interface module (APIM)
3. Audio control module (ACM)
4. Instrument cluster (IC)
5. Driver seat module (DSM) (if equipped)
6. Rear entertainment module (RETM) (if equipped)
7. Heating ventilation air conditioning (HVAC) module (if equipped)
8. Parking aid module (PAM) (if equipped)
9. Satellite digital audio receiver system (SDARS) module (if equipped)
10. Power running board (PRB) module (if equipped)

HS-CAN Operation

The HS-CAN communicates using bussed messages. The HS-CAN uses an unshielded twisted pair cable, data bus (+) and data bus (-) circuits. In addition to scan tool communication, this network allows sharing of information between all modules on the network.

The HS-CAN is a high speed communication network used for the following modules

1. PCM
2. APIM
3. Transmission control module (TCM) (if equipped)
4. Restraints control module (RCM)
5. ABS module
6. Instrument cluster (IC)
7. Occupant classification system module (OCSM)
8. 4X4 control module (if equipped)

Network Termination

The CAN uses a network termination circuit to improve communication reliability. The network termination of the CAN bus takes place inside the termination modules by termination resistors. Termination modules are located at either end of the bus network. As network messages are broadcast in the form of voltage signals, the network voltage signals are stabilized by the termination resistors. Each termination module has a 120 ohm resistor across the positive and negative bus connection in the termination module. With 2 termination modules on each network, and the 120 ohm resistors located in a parallel circuit configuration, the total network impedance, or total resistance is 60 ohms.

Network termination improves bus message reliability by

1. Stabilizing bus voltage
2. Eliminating electrical interference

Gateway Module

The IC is the gateway module, translating HS-CAN to MS-CAN and vice versa. This information allows a message to be distributed throughout both networks. The IC is the only module on this vehicle that has this ability.

Special Tools Illustration Tool Name Tool Number 73III Automotive Meter 105-R0057 or equivalent Vehicle Communication Module (VCM) and Integrated Diagnostic System (IDS) software with appropriate hardware, or equivalent scan tool Flex Probe Kit 105-R025C or equivalent

Scheme 2

Scheme 3

Principles of Operation

Note. The smart junction box (SJB) is also known as the generic electronic module (GEM).

Vehicle communication utilizes both medium and high speed controller area network (CAN) communications. CAN is a method for transferring data among distributed electronic modules via a serial data bus.

The vehicle is equipped with 2 module communication networks

1. Medium speed (MS) CAN
2. High speed (HS) CAN

MS-CAN

The MS-CAN is a medium speed communication network that uses an unshielded twisted pair cable of data (+) and data (-) circuits. The data (+) and the data (-) circuits are each regulated to approximately 2.5 volts during neutral or rested network traffic. As bus messages are sent on the data (+) circuit, voltage is increased by approximately 1.0 volt. Inversely, the data (-) circuit is reduced by approximately 1.0 volt when a bus message is sent. Multiple bus messages can be sent over the network CAN circuits allowing multiple modules to communicate with each other. The MS-CAN will not communicate while certain faults are present, but will operate with diminished performance with other faults present. The MS-CAN may remain operational when 1 of the 2 termination resistors are not present.

The MS-CAN operates at a maximum data transfer speed of 125 Kbps for bus messages and designed for general information transfer. The network will remain operational, but at a degraded level, when certain circuit faults are present.

The following modules are on the MS-CAN

1. Accessory protocol interface module (APIM) (if equipped)
2. Audio control module (ACM)
3. Instrument cluster (IC)
4. Smart junction box (SJB)
5. Parking aid module (PAM) (if equipped)
6. Driver seat module (DSM) (if equipped)
7. Satellite digital audio receiver system (SDARS) module (if equipped)
8. Power running board (PRB) module (if equipped)
9. Rear entertainment module (RETM) (if equipped)
10. Heating ventilation air conditioning (HVAC) module (if equipped)

The following fault chart describes the specific MS-CAN failures and their resulting symptom

MS-CAN COMMUNICATION FAULT CHART

HS-CAN

The HS-CAN is a high speed communication network that uses an unshielded twisted pair cable of data (+) and data (-) circuits. The data (+) and the data (-) circuits are each regulated to approximately 2.5 volts during neutral or rested network traffic. As bus messages are sent on the data (+) circuit, voltage is increased by approximately 1.0 volt. Inversely, the data (-) circuit is reduced by approximately 1.0 volt when a bus message is sent. Multiple bus messages can be sent over the network CAN circuits allowing multiple modules to communicate with each other. The HS-CAN will not communicate while certain faults are present, but will operate with diminished performance with other faults present. The HS-CAN bus may remain operational when 1 of the 2 termination resistors are not present.

The HS-CAN operates at a maximum data transfer speed of 500 Kbps and is designed for real time information transfer and control. The network will remain operational, but at a degraded level, when certain circuit faults are present.

The following modules are on the HS-CAN

1. APIM (if equipped)
2. Instrument cluster (IC)
3. PCM
4. ABS module
5. Restraints control module (RCM)
6. Occupant classification system module (OCSM)
7. Transmission control module (TCM) (if equipped)
8. 4X4 control module (if equipped)

The following fault chart describes the specific HS-CAN failures and their resulting symptom

HS-CAN COMMUNICATION FAULT CHART

The following chart describes the specific CAN messages broadcast by each module, and the module(s) that receive the message

CAN MODULE COMMUNICATION MESSAGE CHART

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): 3 (50A) (no communication with smart junction box [SJB]) 6 (40A) (no communication with ABS module) 19 (30A) (no communication with power running board [PRB] module) 23 (20A) (no communication with 4X4 control module) 24 (10A) (no communication with PCM) 26 (20A) (no communication with 4X4 control module) 27 (20A) (no communication with transmission control module [TCM]) 33 (30A) (no communication with ABS module) 39 (15A) (no communication with PCM) 41 (15A) (no communication with accessory protocol interface module [APIM], satellite digital audio receiver system [SDARS] module, rear entertainment module [RETM]) SJB fuse(s): 1 (20A) (no communication with driver seat module [DSM]) 2 (5A) (no communication with SJB) 3 (20A) (no communication with audio control module [ACM]) 4 (20A) (no power to scan tool) 8 (15A) (no communication with instrument cluster [IC]) 9 (2A) (no communication with TCM, PCM) 12 (5A) (no communication with ACM) 17 (10A) (no communication with restraints control module [RCM], occupant classification system module [OCSM]) 18 (10A) (no communication with ABS module, 4X4 control module, parking aid module [PAM]) 20 (10A) (no communication with heating ventilation air conditioning [HVAC]) module 24 (10A) (no communication with IC) 28 (10A) (no communication with HVAC module) Data link connector (DLC) Wiring harness 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 U»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-u-no-power-to) , 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network) to identify the module not communicating.
6. If the DTCs retrieved are related to the concern, go to DTC Tables. For all other DTCs, refer to «MULTIFUNCTION ELECTRONIC MODULES»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#multifunction-electronic-modules) article.
7. If no DTCs related to the concern are retrieved, go to «Symptom Chart»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network) .

DTC Tables

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 article.

Note. DTC U1900 will set 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.

NETWORK DTC TABLE

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 - 4.0L for schematic and connector information.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Electronic Engine Controls - 4.6L for schematic and connector information.

Normal Operation

The PCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the PCM. The PCM shares the HS-CAN with the transmission control module (TCM) (if equipped), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the occupant classification system module (OCSM), the accessory protocol interface module (APIM) and the instrument cluster (IC).

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. PCM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 4

Scheme 5

Scheme 6

1. A1 POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS (PC/ED) MANUAL PINPOINT TEST QA VERIFICATION CHECK Verify that pinpoint test QA has been performed. Has pinpoint test QA been performed? YES : Go to A2 . NO : REFER to the «Introduction - Gasoline Engines»(/ford/explorer-sport-trac/ii-2006-2010/remont/testing-diagnostics/#engine-controls-introduction-except-diesel-hybrid) article, Section 5, 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 CAN CIRCUITS BETWEEN THE DLC AND THE PCM FOR AN OPEN Disconnect: PCM C175b 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 : 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/removal-installation/#electronic-engine-controls) article. 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 the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test B: The Transmission Control Module (TCM) 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, Transmission Controls - 6R60 for schematic and connector information.

The 6R60 transmission utilizes a transmission control module (TCM) to control transmission functions. The TCM communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the TCM. The TCM shares the HS-CAN with the PCM, the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the occupant classification system module (OCSM), the accessory protocol interface module (APIM) (if equipped) and the instrument cluster (IC). Voltage for the TCM is provided by circuits SBB27 (BU/RD) and CE517 (BU/GN). Circuit GD113 (BK/YE) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. TCM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 7

Scheme 8

1. B1 CHECK THE TCM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: TCM C199 (6R60 Transmission) Key in ON position. Measure the voltage between the TCM, harness side and ground as follows: TCM Connector-Pin Circuit C199-9 CE517 (BU/GN) C199-14 SBB27 (BU/RD) Are the voltages greater than 10 volts? YES : Go to B2 . NO : VERIFY that the battery junction box (BJB) fuse 27 (20A) or smart junction box (SJB) fuse 9 (2A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. B2 CHECK THE TCM GROUND CIRCUITS FOR AN OPEN Key in OFF position. Measure the resistance between the TCM, harness side and ground as follows: TCM Connector-Pin Circuit C199-13 GD113 (BK/YE) C199-16 GD113 (BK/YE) Are the resistances less than 5 ohms? YES : Go to B3 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. B3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE TCM FOR AN OPEN Measure the resistance between the TCM C199-6, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the TCM C199-2, 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 B4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. B4 CHECK FOR CORRECT TCM OPERATION Disconnect the TCM connector. Check for: corrosion damaged pins pushed-out pins Connect the TCM 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 TCM. REFER to Mechatronic Assembly in «AUTOMATIC TRANSAXLE/TRANSMISSION - 6R60»(/ford/explorer-sport-trac/ii-2006-2010/remont/automatic-trans/#automatic-transmission-6r60) article. 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 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.

The ABS module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the ABS module. The ABS module shares the HS-CAN with the PCM, the transmission control module (TCM) (if equipped), the restraints control module (RCM), the 4X4 control module (if equipped), the occupant classification system module (OCSM), the accessory protocol interface module (APIM) (if equipped) and the instrument cluster (IC). Voltage for the ABS module is provided by circuits CBP18 (GY/OG), SBB06 (BN/RD) and SBB33 (RD). Ground is provided by circuit GD120 (BK/GN).

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. ABS module

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 9

Scheme 10

Scheme 11

1. C1 CHECK THE ABS VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: ABS Module C155 Key in ON position. Measure the voltage between the ABS module, harness side and ground as follows: Connector-Pin Circuit C155-1 SBB06 (BN/RD) C155-8 CBP18 (GY/OG) C155-32 SBB33 (RD) Are the voltages greater than 10 volts? YES : Go to C2 . NO : VERIFY the battery junction box (BJB) fuse 6 (40A) or fuse 33 (30A) and the smart junction box (SJB) fuse 18 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. C2 CHECK THE ABS GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ABS module C155-16, circuit GD120 (BK/GN) harness side and ground. Is the resistance less than 5 ohms? YES : Go to C3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. C3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE ABS MODULE FOR AN OPEN Measure the resistance between the ABS module C135-12, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the ABS module C135-13, 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 C4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. C4 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/anti-locktraction-control/#anti-lock-brake-system) article. 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 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.

The restraints control module (RCM) communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the RCM. The RCM shares the HS-CAN with the PCM, the transmission control module (TCM) (if equipped), the ABS module, the 4X4 control module (if equipped), the occupant classification system module (OCSM), the accessory protocol interface module (APIM) (if equipped) and the instrument cluster (IC). Voltage for the RCM is provided by circuit CBP17 (BN/GN), and the RCM is case grounded.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. RCM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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 12

Scheme 13

Scheme 14

1. D1 CHECK THE RCM CONNECTION Key in OFF position. Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Disconnect: RCM C310a Disconnect: RCM C310b Are RCM C310a pin 24 and RCM C310b pins 17 and 18 OK? YES : Go to D2 . NO : REPAIR the RCM connector pins as necessary. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. D2 CHECK THE RCM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Deactivate the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Repower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Key in ON position. Measure the voltage between the RCM C310a-24, circuit CBP17 (BN/GN), harness side and ground. Is the voltage greater than 10 volts? YES : Go to D3 . NO : VERIFY the smart junction box (SJB) fuse 17 (10A) is OK. If OK, REPAIR the circuit. REACTIVATE the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. D3 CHECK THE RCM CASE GROUND Key in OFF position. Measure the resistance between the RCM case and a good chassis ground. Is the resistance less than 5 ohms? YES : Go to D4 . NO : REPAIR the RCM case ground as necessary. REACTIVATE the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. D4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE RCM FOR AN OPEN Measure the resistance between the RCM C310b-18, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the RCM C310b-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 D5 . NO : REPAIR the circuit in question. REACTIVATE the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. D5 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test E: The 4X4 Control 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, Four Wheel Drive Systems for schematic and connector information.

The 4X4 control module communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the 4X4 control module. The 4X4 control module shares the HS-CAN with PCM, the transmission control module (TCM) (if equipped), the ABS module, the restraints control module (RCM), the occupant classification system module (OCSM), the accessory protocol interface module (APIM) (if equipped) and the instrument cluster (IC). Voltage is supplied by circuits CBP18 (GY/OG), SBB23 (RD/WH) and SBB26 (RD/BK). Ground is supplied by circuits GD138 (BK/WH) and GD145 (BK/BU).

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. 4X4 control module

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 15

Scheme 16

1. E1 CHECK THE 4X4 CONTROL MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: 4X4 Control Module C281a Disconnect: 4X4 Control Module C281b Key in ON position. Measure the voltage between the 4X4 control module, harness side and ground as follows: Connector-Pin Circuit C281a-8 CBP18 (GY/OG) C281b-6 SBB23 (WH/RD) C281b-7 SBB26 (YE/RD) Are the voltages greater than 10 volts? YES : Go to E2 . NO : VERIFY the battery junction box (BJB) fuse 23 (20A) or fuse 26 (20A) is OK and the smart junction box (SJB) fuse 18 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. E2 CHECK THE 4X4 CONTROL MODULE GROUND CIRCUITS FOR AN OPEN Key in OFF position. Measure the resistance between the 4X4 control module, harness side and ground as follows: Connector-Pin Circuit C281b-3 GD145 (BK/BU) C281b-10 GD138 (BK/WH) Are the resistances less than 5 ohms? YES : Go to E3 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. E3 CHECK THE HIGH SPEED CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (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 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 : Go to E4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. E4 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/transfer-case/#four-wheel-drive-4wd-systems) article. 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 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.

The occupant classification system module (OCSM) communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the network connection to the OCSM. The OCSM shares the HS-CAN with the PCM, the transmission control module (TCM) (if equipped), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the instrument cluster (IC). Voltage to the OCSM is supplied by circuit CBP17 (BN/GN). Ground is supplied by circuit GD145 (BK/BU).

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. OCSM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 17

Scheme 18

Scheme 19

Scheme 20

1. F1 CHECK THE OCSM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN WARNING: Never probe the electrical connectors on safety belt buckle/retractor pretensioners or adaptive load limiting retractors. 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: 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. Key in OFF position. Depower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Disconnect: OCSM C3159 Deactivate the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Repower the SRS. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. Key in ON position. Measure the voltage between the OCSM C3159-1, circuit CBP17 (BN/GN), harness side and ground. Is the voltage greater than 10 volts? YES : Go to F2 . NO : VERIFY the smart junction box (SJB) fuse 17 (10A) is OK. If OK, REPAIR the circuit. REACTIVATE the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. F2 CHECK THE OCSM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the OCSM C3159-14, circuit GD145 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to F3 . NO : REPAIR the circuit. REACTIVATE the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. F3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE OCSM FOR AN OPEN Measure the resistance between the OCSM C3159-18, circuit VDB04 (WH/BU), harness side and the 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 : Go to F4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. F4 CHECK FOR CORRECT OCCUPANT CLASSIFICATION SYSTEM MODULE 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. 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. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. CLEAR the DTCs. REPEAT the network test with the scan tool.

Pinpoint Test G: 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.

The instrument cluster (IC) communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the HS-CAN connection to the IC and circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the MS-CAN connection to the IC. The IC shares the HS-CAN with the PCM, the transmission control module (TCM) (if equipped), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped) and the occupant classification system module (OCSM). The IC shares the MS-CAN with the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the driver seat module (DSM) (if equipped), the parking aid module (PAM) (if equipped), the PRB module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the rear entertainment module (RETM) (if equipped). Voltage for the IC is provided by circuits CDC34 (WH/OG) and SBP24 (VT/RD). Circuit GD145 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. IC

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 21

Scheme 22

Scheme 23

1. G1 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 G2 . NO : Go to G4 .
2. G2 CHECK THE IC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Disconnect: IC C220 Connect the battery ground cable. Key in ON position. Measure the voltage between the IC, harness side and ground as follows: Instrument Cluster Connector-Pin Circuit C220-1 SBP24 (VT/RD) C220-2 CDC34 (WH/OG) Are the voltages greater than 10 volts? YES : Go to G3 . NO : VERIFY the smart junction box (SJB) fuse 8 (15A) or fuse 24 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. G3 CHECK THE IC GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the IC C220-13, circuit GD145 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to G5 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. G4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE IC FOR AN OPEN Measure the resistance between the IC C220-7, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-8, 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 G5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. G5 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/gauges-instrument-panels/#information-center) article. 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 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.

The smart junction box (SJB) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the SJB. The SJB shares the MS-CAN with the IC, the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the driver seat module (DSM) (if equipped), the parking aid module (PAM) (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the rear entertainment module (RETM) (if equipped). Voltage for the SJB is provided by circuit SBB03 (BU/RD). Circuit GD108 (BK/VT) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. SJB

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

1. H1 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 2 (5A) and ground. Is the voltage greater than 10 volts? YES : Go to H3 . NO : VERIFY the smart junction box (SJB) fuse 2 (5A) is OK. If OK, go to H2 .
2. H2 CHECK THE SJB VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Disconnect: SJB C2280e Measure the voltage between the SJB C2280e-1, circuit SBB03 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to H5 . NO : VERIFY the battery junction box (BJB) fuse 3 (50A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. H3 CHECK THE SJB GROUND CIRCUIT FOR AN OPEN Disconnect: SJB C2280e Measure the resistance between the SJB C2280e-22, circuit GD108 (BK/VT), harness side and ground. Is the resistance less than 5 ohms? YES : Go to H4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. H4 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE SJB FOR AN OPEN Disconnect: SJB C2280d Measure the resistance between the SJB C2280d-16, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280d-15, 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 H5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. H5 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#multifunction-electronic-modules) article. 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 Heating Ventilation Air Conditioning (HVAC) 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, Automatic Climate Control System for schematic and connector information.

The heating ventilation air conditioning (HVAC) module communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the HVAC module. The HVAC module shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the rear entertainment module (RETM) (if equipped), the driver seat module (DSM) (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the HVAC module is provided by circuits CBP20 (YE/VT) and SBP28 (GN/RD). Circuit GD145 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. HVAC module

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 29

Scheme 30

Scheme 31

Scheme 32

1. I1 CHECK THE HVAC MODULE VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: HVAC Module C228a Key in ON position. Measure the voltage between the HVAC module C228a-13, circuit SBP28 (GN/RD), and between the HVAC module C228a-3, circuit CBP20 (YE/VT) and ground. Are the voltages greater than 10 volts? YES : Go to I2 . NO : VERIFY smart junction box (SJB) fuse 20 (10A) or fuse 28 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. I2 CHECK THE HVAC GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the HVAC module C228a-2, circuit GD145 (BK/BU) 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 MEDIUM SPEED CAN (MS-CAN) CIRCUITS BETWEEN THE DLC AND THE HVAC MODULE FOR AN OPEN Measure the resistance between the HVAC module C228a-11, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the HVAC module C228a-1, 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 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/manual-hvac-system/#hvac-control-system) article. 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 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/Navigation for schematic and connector information.

Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the audio control module (ACM). The ACM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the rear entertainment module (RETM), the driver seat module (DSM) (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the ACM is provided by circuits CBP12 (GN/WH) and SBP03 (BU/RD). Circuit GD114 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. ACM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 33

Scheme 34

Scheme 35

Scheme 36

1. J1 CHECK THE ACM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN Key in OFF position. Disconnect: ACM C290a Key in ON position. Measure the voltage between the ACM C290a-1, circuit SBP03 (BU/RD), harness side and ground; and between the ACM C290a-2, circuit CBP12 (GN/WH), harness side and ground. Are the voltages greater than 10 volts? YES : Go to J2 . NO : VERIFY the smart junction box (SJB) fuse 3 (20A) or fuse 12 (5A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. J2 CHECK THE ACM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the ACM C290a-13, circuit GD114 (BK/BU), harness side and ground. Is the resistance 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 ACM FOR AN OPEN Measure the resistance between the ACM C290b-15, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the base ACM C290b-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 J4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. J4 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. TEST the system for normal operation. 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 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/Navigation for schematic and connector information.

The satellite digital audio receiver system (SDARS) module communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the SDARS module. The SDARS module shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the rear entertainment module (RETM) (if equipped), the driver seat module (DSM) (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the SDARS module is provided by circuit SBB41 (RD). Circuit GD114 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. SDARS module

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 37

Scheme 38

Scheme 39

Scheme 40

1. K1 CHECK THE SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: SDARS C3290 Key in ON position. Measure the voltage between the SDARS module C3290-9, circuit SBB41 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to K2 . NO : VERIFY the battery junction box (BJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. K2 CHECK THE SDARS MODULE GROUND CIRCUIT FOR AN OPEN Measure the resistance between the SDARS module C3290-3, 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 DATA LINK CONNECTOR (DLC) AND THE SDARS MODULE FOR AN OPEN Measure the resistance between the SDARS module C3290-1, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SDARS module C3290-7, 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 K4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. K4 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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 Rear Entertainment Module (RETM) 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/Navigation for schematic and connector information.

The rear entertainment module (RETM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the RETM. The RETM is only on vehicles equipped with rear seat entertainment. The RETM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the driver seat module (DSM) (if equipped), the RETM (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the RETM is provided by circuit SBB41 (RD). Circuit GD114 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. RETM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 41

Scheme 42

Scheme 43

Scheme 44

1. L1 CHECK THE RETM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: RETM C9029 Key in ON position. Measure the voltage between the RETM C9029-16, circuit SBB41 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to L2 . NO : VERIFY the battery junction box (BJB) fuse 41 (15A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. L2 CHECK THE RETM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the RETM C9029-1, circuit GD114 (BK/BU), 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 DATA LINK CONNECTOR (DLC) AND THE RETM FOR AN OPEN Measure the resistance between the RETM C9029-8, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the RETM C9029-7, 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 L4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. L4 CHECK FOR CORRECT RETM OPERATION Disconnect the RETM connector. Check for: corrosion damaged pins pushed-out pins Connect the RETM 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 RETM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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: The Driver Seat Module (DSM) 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, Memory Seats for schematic and connector information.

The driver seat module (DSM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the DSM. The DSM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the rear entertainment module (RETM) (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the power running board (PRB) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the DSM is provided by circuit SBP01 (RD). Circuit GD143 (BK/OG) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. DSM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 45

Scheme 46

Scheme 47

Scheme 48

1. M1 CHECK THE DSM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: DSM C341c Key in ON position. Measure the voltage between the DSM C341c-1, circuit SBP01 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to M2 . NO : VERIFY the smart junction box (SJB) fuse 1 (20A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. M2 CHECK THE DSM GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the DSM C341c-13, circuit GD143 (BK/OG), harness side and ground. Is the resistance less than 5 ohms? YES : Go to M3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. M3 CHECK THE MEDIUM SPEED CAN CIRCUITS BETWEEN THE DLC AND THE DSM FOR AN OPEN Measure the resistance between the DSM C341c-11, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the DSM C341c-12, 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 M4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. M4 CHECK FOR CORRECT DSM OPERATION Disconnect all the DSM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the DSM 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 DSM. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#multifunction-electronic-modules) article. 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 N: The Power Running Board Module Does Not Respond To The Scan Tool

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

The power running board (PRB) module communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the PRB module. The PRB module shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the rear entertainment module (RETM) (if equipped), the driver seat module (DSM) (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the accessory protocol interface module (APIM) (if equipped) and the parking aid module (PAM) (if equipped). Voltage for the PRB module is provided by circuit SBB19 (BU/RD). Circuit GD151 (BK/GN) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. PRB module

PINPOINT TEST N: THE POWER RUNNING BOARD (PRB) MODULE 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.

Scheme 49

Scheme 50

Scheme 51

Scheme 52

1. N1 CHECK THE POWER RUNNING BOARD (PRB) MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Key in OFF position. Disconnect: PRB Module C4322b Key in ON position. Measure the voltage between the PRB module C4322b-1, circuit SBB19 (BU/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to N2 . NO : VERIFY the battery junction box (BJB) fuse 19 (30A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. N2 CHECK THE PRB MODULE GROUND CIRCUIT FOR AN OPEN Key in OFF position. Measure the resistance between the PRB module C4322b-4, circuit GD151 (BK/GN), harness side and ground. Is the resistance less than 5 ohms? YES : Go to N3 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. N3 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE PRB MODULE FOR AN OPEN Measure the resistance between the PRB module C4322b-8, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the PRB module C4322b-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 N4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. N4 CHECK FOR CORRECT PRB MODULE OPERATION Disconnect all the PRB module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PRB 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 PRB module. REFER to «EXTERIOR TRIM AND ORNAMENTATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/exteriorinterior-trim/#exterior-trim-and-ornamentation) article. 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 O: The Parking Aid 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, Parking Aid for schematic and connector information.

The parking aid module (PAM) communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the PAM. The PAM shares the MS-CAN with the instrument cluster (IC), the smart junction box (SJB), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the rear entertainment module (RETM) (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), , the accessory protocol interface module (APIM) (if equipped) and the power running board (PRB) module (if equipped). Voltage for the PAM is provided by circuit CBP18 (GY/OG). Circuit GD145 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. PAM

PINPOINT TEST O: THE PARKING AID MODULE (PAM) 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.

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

1. O1 VERIFY PARKING AID SYSTEM TYPE NOTE: The Explorer uses a radar parking aid system while the Mountaineer and Explorer Sport Trac use an ultrasonic system. Verify the parking aid system. Is the vehicle equipped with a RADAR parking aid system? YES : Go to O2 . NO : Go to O5 .
2. O2 CHECK THE PARKING AID MODULE (PAM) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN (RADAR) Key in OFF position. Disconnect: PAM C4226 Key in ON position. Measure the voltage between the PAM C4226-18, circuit CBP18 (GY/OG), harness side and ground. Is the voltage greater than 10 volts? YES : Go to O3 . NO : VERIFY the smart junction box (SJB) fuse 18 (10A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. O3 CHECK THE PAM ROUND CIRCUIT FOR AN OPEN (RADAR) Key in OFF position. Measure the resistance between the PAM C4226-6, circuit GD145 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to O4 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. O4 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE PAM FOR AN OPEN (RADAR) Measure the resistance between the PAM C4226-4, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the PAM C4226-5, 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 O8 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. O5 CHECK THE PAM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN (ULTRASONIC) Key in OFF position. Disconnect: PAM C4014 (Mountaineer) or C3267 (Explorer Sport Trac) Key in ON position. Measure the voltage between the PAM C4014-1 (Mountaineer) or C3267-1 (Explorer Sport Trac), circuit CBP18 (GY/OG), harness side and ground. Is the voltage greater than 10 volts? YES : Go to O6 . NO : VERIFY the smart junction box (SJB) fuse 18 (10A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
6. O6 CHECK THE PAM GROUND CIRCUIT FOR AN OPEN (ULTRASONIC) Key in OFF position. Measure the resistance between the PAM C4014-4 (Mountaineer) or C3267-4 (Explorer Sport Trac), circuit GD145 (BK/BU), harness side and ground. Is the resistance less than 5 ohms? YES : Go to O7 . NO : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
7. O7 CHECK THE MS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE PAM FOR AN OPEN (ULTRASONIC) Measure the resistance between the PAM C4014-3 (Mountaineer) or C3267-3 (Explorer Sport Trac), circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the PAM C4014-11 (Mountaineer) or C3267-11 (Explorer Sport Trac), 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 O8 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
8. O8 CHECK FOR CORRECT PAM OPERATION Disconnect the PAM connector. Check for: corrosion damaged pins pushed-out pins Connect the PAM 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 PAM. REFER to «PARKING AID»(/ford/explorer-sport-trac/ii-2006-2010/remont/collisionavoidance/#parking-aid-system) article. 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 P: 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.

The accessory protocol interface module (APIM) communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the HS-CAN connection to the APIM. Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the MS-CAN connection to the APIM. Voltage for the APIM is provided by circuit SBB41 (RD). Circuit GD114 (BK/BU) provides ground.

The APIM shares the HS-CAN with the PCM, the ABS module, the instrument cluster (IC), the transmission control module (TCM), the 4X4 control module, the occupant classification system module (OCSM) and the restraints control module (RCM).

The APIM shares the MS-CAN with the audio control module (ACM), the power running board module (PRB), the parking aid module (PAM), the front controls interface module (FCIM), the front display interface module (FDIM), the satellite digital audio receiver system (SDARS) module, the HVAC module, the instrument cluster (IC) and the smart junction box (SJB).

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. APIM

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 61

Scheme 62

Scheme 63

Scheme 64

Scheme 65

Scheme 66

1. P1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Disconnect: APIM C3342 Key in ON position. Measure the voltage between the APIM C3342-1, circuit SBB41 (RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to P2 . NO : VERIFY the SJB fuse 41 (15A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. P2 CHECK THE APIM GROUND CIRCUITS FOR AN OPEN Key in OFF position. Measure the resistance between the APIM C3342-37, 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 P3 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
3. P3 CHECK THE HS-CAN CIRCUITS BETWEEN THE APIM AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN Measure the resistance between the APIM C3342-53, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the APIM C3342-54, 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 P4 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
4. P4 CHECK THE MS-CAN CIRCUITS BETWEEN THE DLC AND THE APIM FOR AN OPEN Measure the resistance between the APIM C3342-16, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the APIM C3342-17, 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 P5 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
5. P5 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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 Q: 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.

The medium speed controller area network (MS-CAN) uses an unshielded twisted pair cable, circuits VDB06 (GY/OG) and VDB07 (VT/OG) provide the network connection to all modules on the network. The smart junction box (SJB), the instrument cluster (IC), the heating ventilation air conditioning (HVAC) module (if equipped), the audio control module (ACM), the satellite digital audio receiver system (SDARS) module (if equipped), the rear entertainment module (RETM) (if equipped), the power running board (PRB) module (if equipped), the parking aid module (PAM) (if equipped), the accessory protocol interface module (APIM) (if equipped) and the driver seat module (DSM) (if equipped) all communicate with the scan tool using the MS-CAN.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. SJB
3. IC
4. ACM
5. Accessory protocol interface module (APIM) (if equipped)
6. HVAC module (if equipped)
7. RETM (if equipped)
8. DSM (if equipped)
9. SDARS module (if equipped)
10. PRB module (if equipped)
11. PAM (if equipped)

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 67

Scheme 68

Scheme 69

Scheme 70

1. Q1 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 3 and 11 for damage. Are DLC pins 3 and 11 OK? YES : Go to Q2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. Q2 CHECK THE MS-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 C251-3, 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 Q5 . NO : Go to Q3 .
3. Q3 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 Q7 . NO : Go to Q4 .
4. Q4 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 Q8 . NO : Go to Q7 .
5. Q5 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 Q6 . NO : Go to Q25 .
6. Q6 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 in question. 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. Q7 CHECK THE MS-CAN CIRCUITS BETWEEN THE SJB AND THE DLC FOR AN OPEN Disconnect: SJB C2280d Measure the resistance between the SJB C2280d-16, circuit VDB06 (GY/OG), harness side and the DLC C251-3, circuit VDB06 (GY/OG), harness side. Measure the resistance between the SJB C2280d-15, 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 battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
8. Q8 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SJB DISCONNECTED Disconnect: SJB C2280d 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 Q9 . NO : CONNECT the battery. Go to Q42 .
9. Q9 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE INSTRUMENT CLUSTER (IC) DISCONNECTED Disconnect: ICC220 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 Q10 . NO : CONNECT the battery. Go to Q43 .
10. Q10 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE AUDIO CONTROL MODULE (ACM) DISCONNECTED Disconnect: ACMC290b 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 Q11 . NO : CONNECT the battery. Go to Q44 .
11. Q11 VERIFY VEHICLE EQUIPMENT - HVAC MODULE Inspect the vehicle for a HVAC module. Is the vehicle equipped with a HVAC module? YES : Go to Q12 . NO : Go to Q13 .
12. Q12 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C228a 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 Q13 . NO : CONNECT the battery. Go to Q45 .
13. Q13 VERIFY VEHICLE EQUIPMENT - RETM Inspect the vehicle for a RETM. Is the vehicle equipped with a RETM? YES : Go to Q14 . NO : Go to Q15 .
14. Q14 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RETM DISCONNECTED Disconnect: RETM C9029 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 Q15 . NO : CONNECT the battery. Go to Q46 .
15. Q15 VERIFY VEHICLE EQUIPMENT - DRIVER SEAT MODULE (DSM) Inspect the vehicle for a DSM. Is the vehicle equipped with a DSM? YES : Go to Q16 . NO : Go to Q17 .
16. Q16 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE DRIVER SEAT MODULE (DSM) DISCONNECTED Disconnect: DSM C341c 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 Q17 . NO : CONNECT the battery. Go to Q47 .
17. Q17 VERIFY VEHICLE EQUIPMENT - SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE Inspect the vehicle for a SDARS module. Is the vehicle equipped with a SDARS module? YES : Go to Q18 . NO : Go to Q19 .
18. Q18 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS C3290 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 Q19 . NO : CONNECT the battery. Go to Q48 .
19. Q19 VERIFY VEHICLE EQUIPMENT - POWER RUNNING BOARD (PRB) MODULE Inspect the vehicle for a PRB module. Is the vehicle equipped with a PRB module? YES : Go to Q20 . NO : Go to Q21 .
20. Q20 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PRB MODULE DISCONNECTED Disconnect: PRB Module C4322b 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 Q21 . NO : CONNECT the battery. Go to Q49 .
21. Q21 VERIFY VEHICLE EQUIPMENT - PARKING AID MODULE (PAM) Inspect the vehicle for a PAM. Is the vehicle equipped with a PAM? YES : Go to Q22 . NO : Go to Q23 .
22. Q22 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PAM DISCONNECTED Disconnect: PAM C4014 (Mountaineer), C3267 (Explorer Sport Trac) or C4226 (Explorer) 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 battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : CONNECT the battery. Go to Q50 .
23. Q23 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to Q24 . NO : REPAIR the circuits. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
24. Q24 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C3342 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 : CONNECT the battery. Go to Q51 .
25. Q25 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SMART JUNCTION BOX (SJB) DISCONNECTED Disconnect: SJB C2280d 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 : CONNECT the battery. Go to Q42 . NO : Go to Q26 .
26. Q26 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE INSTRUMENT CLUSTER (IC) DISCONNECTED Disconnect: ICC220 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 : CONNECT the battery. Go to Q43 . NO : Go to Q27 .
27. Q27 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE AUDIO CONTROL MODULE (ACM) DISCONNECTED Disconnect: ACM C290b 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 : CONNECT the battery. Go to Q44 . NO : Go to Q28 .
28. Q28 VERIFY VEHICLE EQUIPMENT - HVAC MODULE Inspect the vehicle for an HVAC module. Is the vehicle equipped with an HVAC module? YES : Go to Q29 . NO : Go to Q30 .
29. Q29 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE HVAC MODULE DISCONNECTED Disconnect: HVAC Module C228a 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 : CONNECT the battery. Go to Q45 . NO : Go to Q30 .
30. Q30 VERIFY VEHICLE EQUIPMENT - REAR ENTERTAINMENT MODULE (RETM) Inspect the vehicle for a RETM. Is the vehicle equipped with a RETM? YES : Go to Q31 . NO : Go to Q32 .
31. Q31 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RETM DISCONNECTED Disconnect: RETM C9029 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 : CONNECT the battery. Go to Q46 . NO : Go to Q32 .
32. Q32 VERIFY VEHICLE EQUIPMENT - DRIVER SEAT MODULE (DSM) Inspect the vehicle for a DSM. Is the vehicle equipped with a DSM? YES : Go to Q33 . NO : Go to Q34 .
33. Q33 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE DSM DISCONNECTED Disconnect: DSM C341c 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 : CONNECT the battery. Go to Q47 . NO : Go to Q34 .
34. Q34 VERIFY VEHICLE EQUIPMENT - SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE Inspect the vehicle for a SDARS module. Is the vehicle equipped with a SDARS module? YES : Go to Q35 . NO : Go to Q36 .
35. Q35 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE SDARS MODULE DISCONNECTED Disconnect: SDARS Module C3290 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 : CONNECT the battery. Go to Q48 . NO : Go to Q36 .
36. Q36 VERIFY VEHICLE EQUIPMENT - POWER RUNNING BOARD (PRB) MODULE Inspect the vehicle for a PRB module. Is the vehicle equipped with a PRB module? YES : Go to Q37 . NO : Go to Q38 .
37. Q37 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PRB MODULE DISCONNECTED Disconnect: PRB Module C4322b 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 : CONNECT the battery. Go to Q49 . NO : Go to Q38 .
38. Q38 VERIFY VEHICLE EQUIPMENT - PARKING AID MODULE (PAM) Inspect the vehicle for a PAM. Is the vehicle equipped with a PAM? YES : Go to Q39 . NO : Go to Q40 .
39. Q39 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PAM DISCONNECTED Disconnect: PAM C4014 (Mountaineer), C3267 (Explorer Sport Trac) or C4226 (Explorer) 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 : CONNECT the battery. Go to Q50 . NO : Go to Q40 .
40. Q40 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to Q41 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
41. Q41 CHECK THE MS-CAN (+) AND MS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C3342 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 : CONNECT the battery. Go to Q51 . 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.
42. Q42 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#multifunction-electronic-modules) article. 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.
43. Q43 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/gauges-instrument-panels/#information-center) article. 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.
44. Q44 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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.
45. Q45 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/manual-hvac-system/#hvac-control-system) article. 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.
46. Q46 CHECK FOR CORRECT RETM OPERATION Disconnect the RETM connector. Check for: corrosion damaged pins pushed-out pins Connect the RETM 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 RETM. REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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.
47. Q47 CHECK FOR CORRECT DSM OPERATION Disconnect all the DSM connectors. Check for: corrosion damaged pins pushed-out pins Connect all the DSM 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 DSM. REFER to «MULTIFUNCTION ELECTRONIC MODULES»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#multifunction-electronic-modules) article. 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.
48. Q48 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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.
49. Q49 CHECK FOR CORRECT PRB MODULE OPERATION Disconnect all the PRB module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the PRB 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 PRB module. REFER to «EXTERIOR TRIM AND ORNAMENTATION»(/ford/explorer-sport-trac/ii-2006-2010/remont/exteriorinterior-trim/#exterior-trim-and-ornamentation) article. 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.
50. Q50 CHECK FOR CORRECT PAM OPERATION Disconnect the PAM connector. Check for: corrosion damaged pins pushed-out pins Connect the PAM 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 PAM. REFER to «PARKING AID»(/ford/explorer-sport-trac/ii-2006-2010/remont/collisionavoidance/#parking-aid-system) article. 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.
51. Q51 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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.

An open circuit VDB06 (GY/OG) (MS-CAN +) or VDB07 (VT/OG) (MS-CAN -) may cause intermittent or unreliable communication to all modules on the high speed controller area network (HS-CAN). The HS-CAN is used for communication between the following modules

1. Audio control module (ACM)
2. Accessory protocol interface module (APIM)
3. Rear entertainment module (RETM)
4. Driver seat module (DSM)
5. Heating ventilation air conditioning (HVAC) module
6. Instrument cluster (IC)
7. Parking aid module (PAM)
8. Power running board (PRB) module
9. Satellite digital audio receiver system (SDARS) module
10. Smart junction box (SJB)

In the event that one of the 2 network circuits (MS-CAN + or MS-CAN -) becomes open to a module on the network, unreliable network communication to all modules on the network may result.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors

PINPOINT TEST R: INTERMITTENT NO MEDIUM SPEED CONTROLLER AREA NETWORK (MS-CAN) COMMUNICATION, ONE OR MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST

1. R1 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. NOTE: Various network DTCs will set while disabling modules in this test procedure which will need to be cleared after the diagnostic procedure is completed. 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 R2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. R2 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 R3 . NO : Go to «Pinpoint Test P»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-p-the-accessory-protocol) .
3. R3 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 R4 . NO : Go to «Pinpoint Test P»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-p-the-accessory-protocol) .
4. R4 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 in question. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to R5 .
5. R5 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE HEATING VENTILATION AIR CONDITIONING (HVAC) MODULE DISABLED Disconnect: SJB Fuses 20 (10A) and 28 (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 I»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-i-the-heating-ventilation) . NO : INSTALL the removed fuses. Go to R6 .
6. R6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE AUDIO CONTROL MODULE (ACM) DISABLED Disconnect: SJB Fuse 3 (20A) and 12 (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 fuses. Go to «Pinpoint Test J»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-j-the-audio-control) . NO : INSTALL the removed fuses. Go to R7 .
7. R7 VERIFY VEHICLE EQUIPMENT - DRIVER SEAT MODULE (DSM) Inspect the vehicle for a DSM. Is the vehicle equipped with a DSM? YES : Go to R8 . NO : Go to R9 .
8. R8 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE DSM DISABLED Disconnect: SJB Fuse 1 (20A) 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 M»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-m-the-driver-seat) . NO : INSTALL the removed fuse. Go to R9 .
9. R9 VERIFY VEHICLE EQUIPMENT - POWER RUNNING BOARD (PRB) MODULE Inspect the vehicle for power running boards. Is the vehicle equipped with power running boards? YES : Go to R10 . NO : Go to R11 .
10. R10 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PRB MODULE DISABLED Disconnect: BJB Fuse 19 (30A) 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 N»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-n-the-power-running) . NO : INSTALL the removed fuse. Go to R11 .
11. R11 VERIFY VEHICLE EQUIPMENT - REAR ENTERTAINMENT MODULE (RETM) ACCESSORY PROTOCOL INTERFACE MODULE (APIM) AND/OR SATELLITE DIGITAL AUDIO RECEIVER SYSTEM (SDARS) MODULE Inspect the vehicle for a RETM, APIM, and/or a SDARS module. Is the vehicle equipped with a RETM, APIM and/or a SDARS module? YES : Go to R12 . NO : Go to R14 .
12. R12 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RETM, APIM, AND/OR SDARS MODULE DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: BJB Fuse 41 (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. For vehicles equipped with two or more of the following modules: RETM, APIM, SDARS module, go to R13 . For vehicles equipped with a RETM only, go to «Pinpoint Test L»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-l-the-rear-entertainment) . For vehicles equipped with a APIM only, go to «Pinpoint Test P»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-p-the-accessory-protocol) . For vehicles equipped with a SDARS module only, go to «Pinpoint Test K»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-k-the-satellite-digital) . NO : INSTALL the removed fuse. Go to R16 .
13. R13 VERIFY VEHICLE EQUIPMENT - RETM Inspect the vehicle for a RETM. Is the vehicle equipped with a RETM? YES : Go to R14 . NO : Go to R15 .
14. R14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RETM DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: RETM C9029 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 RETM. Go to «Pinpoint Test L»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-l-the-rear-entertainment) . NO : Go to R15
15. R15 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: APIM C3342 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 APIM. Go to «Pinpoint Test P»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-p-the-accessory-protocol) . NO : CONNECT the APIM. Go to «Pinpoint Test K»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-k-the-satellite-digital) .
16. R16 VERIFY VEHICLE EQUIPMENT - PARKING AID MODULE (PAM) Inspect the vehicle for a PAM. Is the vehicle equipped with a PAM? YES : Go to R17 . NO : Go to R18 .
17. R17 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE PAM DISABLED Disconnect: SJB Fuse 18 (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 O»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-o-the-parking-aid) . NO : INSTALL the removed fuse. Go to R18 .
18. R18 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE INSTRUMENT CLUSTER (IC) DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 8 (15A) and 24 (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 G»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-g-the-instrument-cluster) . NO : INSTALL the removed fuses. An intermittent fault is not present. Go to «Pinpoint Test Q»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-q-no-medium-speed) .

Pinpoint Test S: 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.

The high speed controller area network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). The PCM, the transmission control module (TCM), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the occupant classification system module (OCSM) and the instrument cluster (IC) all communicate with the scan tool using the HS-CAN.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. PCM
3. RCM
4. ABS module
5. IC
6. TCM (if equipped)
7. 4X4 control module (if equipped)
8. OCSM
9. Accessory protocol interface module (APIM) (if equipped)

Note. Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Scheme 71

Scheme 72

Scheme 73

1. S1 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 S2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. S2 CHECK THE HS-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 C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side. Is the resistance between 54 and 66 ohms? YES : Go to S3 . NO : Go to S5 .
3. S3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : Go to S4 . NO : Go to S22 .
4. S4 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 : The CAN has tested within specifications. VERIFY the scan tool operation on a known good vehicle and REPEAT the network test on the suspect vehicle.
5. S5 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 S6 . NO : Go to S9 .
6. S6 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 S7 . NO : Go to S8 .
7. S7 CHECK THE 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 battery. Go to S33 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
8. S8 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE INSTRUMENT CLUSTER (IC) FOR AN OPEN Disconnect: IC C220 Measure the resistance between the IC C220-7, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side. Measure the resistance between the IC C220-8, 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 battery. Go to S37 . NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
9. S9 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 S11 . NO : Go to S10 .
10. S10 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN Disconnect: PCM C175b 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 : The CAN has tested within specifications. VERIFY the scan tool operation on a known good vehicle, and REPEAT the network test on the suspect vehicle. NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
11. S11 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 S12 . NO : CONNECT the battery.Go to S33 .
12. S12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C155 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 S13 . NO : CONNECT the battery. Go to S34 .
13. S13 VERIFY VEHICLE EQUIPMENT - 6R60 TRANSMISSION Inspect the vehicle for a 6R60 transmission. Is the vehicle equipped with a 6R60 transmission? YES : Go to S14 . NO : Go to S15 .
14. S14 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE TCM DISCONNECTED Disconnect: TCM C199 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 S15 . NO : CONNECT the battery. Go to S35 .
15. S15 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE Inspect the vehicle for 4X4. Is the vehicle equipped with 4X4? YES : Go to S16 . NO : Go to S17 .
16. S16 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 S17 . NO : CONNECT the battery. Go to S36 .
17. S17 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE INSTRUMENT CLUSTER (IC) DISCONNECTED Disconnect: Instrument Cluster (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 S18 . NO : CONNECT the battery. Go to S37 .
18. S18 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RESTRAINTS CONTROL MODULE (RCM) DISCONNECTED Disconnect: RCM C310b 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 S19 . NO : CONNECT the battery. Go to S38 .
19. S19 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (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 : Go to S20 . NO : CONNECT the battery. Go to S39 .
20. S20 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to S21 . NO : REPAIR the circuit. CONNECT all modules. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
21. S21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED Disconnect: APIM C3342 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 : CONNECT the battery. Go to S40 .
22. S22 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 battery. Go to S33 . NO : Go to S23 .
23. S23 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE ABS MODULE DISCONNECTED Disconnect: ABS Module C155 Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery. Go to S34 . NO : Go to S24 .
24. S24 VERIFY VEHICLE EQUIPMENT - 6R60 TRANSMISSION Inspect the vehicle for a 6R60 transmission. Is the vehicle equipped with a 6R60 transmission? YES : Go to S25 . NO : Go to S26 .
25. S25 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE TRANSMISSION CONTROL MODULE (TCM) DISCONNECTED Disconnect: TCM C199 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 : CONNECT the battery. Go to S35 . NO : Go to S26 .
26. S26 VERIFY VEHICLE EQUIPMENT - 4X4 CONTROL MODULE Inspect the vehicle for 4X4. Is the vehicle equipped with 4X4? YES : Go to S27 . NO : Go to S28 .
27. S27 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 the DLC C251-14, circuit VDB05 (WH), harness side. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery. Go to S36 . NO : Go to S28 .
28. S28 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE INSTRUMENT CLUSTER (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 : CONNECT the battery. Go to S37 . NO : Go to S29 .
29. S29 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE RCM DISCONNECTED Disconnect: RCM C310b Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground. Are the resistances greater than 1,000 ohms? YES : CONNECT the battery. Go to S38 . NO : Go to S30 .
30. S30 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE OCCUPANT CLASSIFICATION SYSTEM MODULE (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 battery. Go to S39 . NO : Go to S31 .
31. S31 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to S32 . NO : REPAIR the circuit in question. CONNECT all modules. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
32. S32 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE APIM DISCONNECTED Disconnect: APIM C3342 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 : CONNECT the battery. Go to S40 . NO : REPAIR the circuit in question. CONNECT all modules. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
33. S33 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/removal-installation/#electronic-engine-controls) article. 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.
34. S34 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/anti-locktraction-control/#anti-lock-brake-system) article. 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.
35. S35 CHECK FOR CORRECT TCM OPERATION Disconnect the TCM connector. Check for: corrosion damaged pins pushed-out pins Connect the TCM 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 TCM. REFER to Mechatronic Assembly in «AUTOMATIC TRANSAXLE/TRANSMISSION - 6R60»(/ford/explorer-sport-trac/ii-2006-2010/remont/automatic-trans/#automatic-transmission-6r60) article. 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.
36. S36 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION Disconnect the 4X4 control module connector. Check for: corrosion damaged pins pushed-out pins Connect the 4X4 control 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 4X4 control module. REFER to «FOUR WHEEL DRIVE (4WD) SYSTEMS»(/ford/explorer-sport-trac/ii-2006-2010/remont/transfer-case/#four-wheel-drive-4wd-systems) article. 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.
37. S37 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/gauges-instrument-panels/#information-center) article. 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.
38. S38 CHECK FOR CORRECT RCM OPERATION Disconnect all the RCM module connectors. Check for: corrosion damaged pins pushed-out pins Connect all the RCM module connectors and make sure they seat correctly. Verify the concern is still present. Is the concern still present? YES : INSTALL a new RCM module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. 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. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
39. S39 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»(/ford/explorer-sport-trac/ii-2006-2010/remont/airbag/#supplemental-inflatable-restraint-system) article. 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.
40. S40 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. Verify the concern is still present. Is the concern still present? YES : INSTALL a new APIM . REFER to «INFORMATION AND ENTERTAINMENT SYSTEMS»(/ford/explorer-sport-trac/ii-2006-2010/remont/entertainment-systems/#information-system-and-entertainment-systems) article. 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 the battery ground cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

An open circuit VDB04 (WH/BU) (HS-CAN +) or VDB05 (WH) (HS-CAN -) may cause intermittent or unreliable communication to all modules on the HS-CAN. The HS-CAN is used for communication between the following modules

1. ABS module
2. Accessory protocol interface module (APIM) (if equipped)
3. Instrument cluster (IC)
4. Occupant classification system module (OCSM)
5. PCM
6. Restraints control module (RCM)
7. Transmission control module (TCM) (6R60 transmission only)
8. 4X4 control module (if equipped)

In the event that one of the 2 network circuits (HS-CAN + or HS-CAN -) becomes open to a module on the network, unreliable network communication to all modules on the network may result.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors

PINPOINT TEST T: 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.

1. T1 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 T2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. T2 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 T3 . NO : Go to «Pinpoint Test R»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-r-intermittent-no-medium) .
3. T3 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 T4 . NO : Go to «Pinpoint Test R»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-r-intermittent-no-medium) .
4. T4 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 in question. CLEAR the DTCs. REPEAT the network test with the scan tool. NO : Go to T5 .
5. T5 CHECK FOR RESTORED COMMUNICATION WITH THE PCM DISABLED NOTE: A scan tool 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 will not automatically run a network test. The network test must be manually selected and run. Disconnect: BJB Fuse 24 (10A) and 39 (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 fuses. Go to «Pinpoint Test A»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-a-the-pcm-does) . NO : INSTALL the removed fuses. Go to T6 .
6. T6 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE AND 4X4 CONTROL MODULE (IF EQUIPPED) DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB fuse 18 (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. If the vehicle is equipped with 4X4, go to T7 . If the vehicle is not equipped with 4X4, go to «Pinpoint Test C»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-c-the-abs-module) . NO : INSTALL the removed fuse. Go to T8 .
7. T7 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE ABS MODULE DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: ABS Module C155 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 ABS module. Go to «Pinpoint Test C»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-c-the-abs-module) . NO : CONNECT the ABS module. Go to «Pinpoint Test E»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-e-the-4x4-control) .
8. T8 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 will revert back to the prior run network test results. Disconnect: SJB Fuse 17 (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 T9 . NO : INSTALL the removed fuse. Go to T10 .
9. T9 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE RCM DISCONNECTED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: RCM C310b 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 RCM. Go to «Pinpoint Test D»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-d-the-restraints-control) . NO : CONNECT the RCM. Go to «Pinpoint Test F»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-f-the-occupant-classification) .
10. T10 VERIFY VEHICLE EQUIPMENT - TRANSMISSION CONTROL MODULE (TCM) A TCM is present in 6R60 transmission equipped vehicles only. Inspect the vehicle for a 6R60 transmission. Is the vehicle equipped with a 6R60 transmission? YES : Go to T11 . NO : Go to T12 .
11. T11 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE TCM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: BJB Fuse 27 (20A) and SJB Fuse 9 (2A) 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 B»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-b-the-transmission-control) . NO : INSTALL the removed fuses. Go to T12 .
12. T12 VERIFY VEHICLE EQUIPMENT - ACCESSORY PROTOCOL INTERFACE MODULE (APIM) Inspect the vehicle for an APIM. Is the vehicle equipped with an APIM? YES : Go to T13 . NO : Go to T14 .
13. T13 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE APIM DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: BJB Fuse 41 (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 P»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-p-the-accessory-protocol) . NO : INSTALL the removed fuse. Go to T14 .
14. T14 CHECK FOR RESTORED NETWORK COMMUNICATION WITH THE INSTRUMENT CLUSTER (IC) DISABLED NOTE: When re-running the network test, the network test application must be first closed or the screen display will revert back to the prior run network test results. Disconnect: SJB Fuse 8 (15A) and 24 (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 G»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-g-the-instrument-cluster) . NO : INSTALL the removed fuses. An intermittent fault is not present. Go to «Pinpoint Test S»(/ford/explorer-sport-trac/ii-2006-2010/remont/communication-devices/#module-communications-network__pinpoint-test-s-no-high-speed) .

Pinpoint Test U: No Power To The Scan Tool

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

The scan tool is connected to the data link connector (DLC) to communicate with the high speed controller area network (HS-CAN) and the medium speed controller area network (MS-CAN) communications network. Voltage for the scan tool is provided by circuit SBP04 (GN/RD). Ground is provided by circuits GD108 (BK/VT) and GD138 (BK/WH).

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Scan tool

Scheme 74

Scheme 75

Scheme 76

1. U1 CHECK THE 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. Disconnect the scan tool cable from the DLC. Inspect DLC pins 4, 5 and 16 for damage. Are DLC pins 4, 5 and 16 OK? YES : Go to U2 . NO : REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
2. U2 CHECK THE DLC VOLTAGE SUPPLY CIRCUIT FOR AN OPEN Measure the voltage between the DLC C251-16, circuit SBP04 (GN/RD), harness side and ground. Is the voltage greater than 10 volts? YES : Go to U3 . NO : VERIFY the smart junction box (SJB) fuse 4 (20A) is OK. If OK, REPAIR the circuit. REPEAT the network test with the scan tool.
3. U3 CHECK THE DLC GROUND CIRCUITS FOR AN OPEN Measure the resistance between the DLC C251-5, circuit GD108 (BK/VT), harness side and ground; and between the DLC C251-4, circuit GD138 (BK/WH), harness side and ground. Are the resistances less than 5 ohms? YES : REPAIR the scan tool. REPEAT the network test with the scan tool. NO : REPAIR the circuit in question. REPEAT the network test with the scan tool.

See also:
• MULTIFUNCTION ELECTRONIC MODULES
• BATTERY, MOUNTING AND CABLES
• INFORMATION AND ENTERTAINMENT SYSTEMS
• VEHICLE DYNAMIC SYSTEMS
• INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES
• ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS)
• Introduction - Gasoline Engines
• ELECTRONIC ENGINE CONTROLS
• AUTOMATIC TRANSAXLE/TRANSMISSION - 6R60
• SUPPLEMENTAL RESTRAINT SYSTEM
• FOUR WHEEL DRIVE (4WD) SYSTEMS
• CLIMATE CONTROL
• EXTERIOR TRIM AND ORNAMENTATION
• PARKING AID
• Pinpoint Test U
• Symptom Chart
• Pinpoint Test A
• Pinpoint Test B
• Pinpoint Test C
• Pinpoint Test D
• Pinpoint Test E
• Pinpoint Test F
• Pinpoint Test G
• Pinpoint Test H
• Pinpoint Test I
• Pinpoint Test J
• Pinpoint Test K
• Pinpoint Test L
• Pinpoint Test M
• Pinpoint Test N
• Pinpoint Test O
• Pinpoint Test P
• Pinpoint Test Q
• Pinpoint Test R
• Pinpoint Test S
• Pinpoint Test T