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Electrical System and Main PDM Overview G02.01 Table of Contents System Overview Terms and Abbreviations Electronic Power Distribution Electrical Power Distribution Main Ground Junction Block (MGJB), Module 280 MEGA Fuse Junction Block (MFJB), Module 285 Powertrain PDM, Module 286 Load Disconnect Switch, Module 293 Trailer PDM, Module 296 PDM Diagram Related Subjects 500 501 502 503 504 505 506 507 508 509 Components Component Locations 600 Component Details 601 Troubleshooting Possible Causes 700 Diagnostic Tools Required 701 Diagnosis 702 Specifications SAM Cab Fuses and Relays SAM Chassis Fuses and Relays MFJB Fuses Powertrain PDM and Trailer PDM Fuses and Relays Cascadia Troubleshooting Manual, August 2007 800 801 802 803 Electrical System and Main PDM Overview G02.01 500 — Terms and Abbreviations Backbone—The main J1939 datalink wiring that lies between the two terminating resistors It does not include the branch circuits to each ECU or to the diagnostic connector CAN—Controller Area Network CAN ID—The identifier for a specific message, which also contains the source address of the sending ECU communicating on the J1939 datalink CGW—Central Gateway Communication Protocol—A set of rules governing communication between electronic devices Datalink—A collection of wires, connecting system components, through which data is transmitted Datalink Topology—The arrangement in which the nodes (ECUs) of a datalink are connected to each other Diagnostic CAN—Datalink that runs from the diagnostic connector to the CGW Diagnostic Connector—A 9-pin diagnostic connector is used for troubleshooting the electrical system MFJB—MEGA® Fuse Junction Block MGJB—Main Ground Junction Block SA—Source Address; indicates numeric assignment for a device that communicates on J1939 SAM—Signal Detect and Actuation Module SAM Cab—Signal Detect and Actuation Module Cab ("SAM Cabin"); this ECU controls mainly cab-related functionality See G02.04 — SAM Cab for more information SAM Chassis—Signal Detect and Actuation Module Chassis; this ECU controls mainly chassis-related functionality See G02.05 — SAM Chassis for more information 501 — Electronic Power Distribution The multiplexed system contains the following power distribution components: • SAM Cab (relays and fuses), Module 32A • SAM Chassis (relays and fuses), Module 32K The SAM Cab and SAM Chassis are electronic control units (ECUs) that have power distribution components such as fuses and relays on them Refer to G02.04 — SAM Cab and G02.05 — SAM Chassis for more information 502 — Electrical Power Distribution Standard electrical power distribution provides battery power to the electronics system, but it is not controlled by electronics The following modules are part of power distribution: • Main Ground Junction Block (MGJB), Module 280 • MEGA Fuse Junction Block (MFJB), Module 285 • Powertrain PDM, Module 286 Cascadia Troubleshooting Manual, August 2007 G02.01/1 G02.01 Electrical System and Main PDM Overview • Load Disconnect Switch, Module 293 • Trailer PDM, Module 296 503 — Main Ground Junction Block (MGJB), Module 280 The MGJB is a main node for connecting a returning ground to the battery Many of the ground circuits previously on the starter are now on the MGJB 504 — MEGA Fuse Junction Block (MFJB), Module 285 The MFJB houses up to MEGA fuses, and provides power to the engine harness, SAM Cab, SAM Chassis, chassis-mounted trailer PDM, and an inverter The advantage of using an MFJB is that it provides increased robustness in the engine control and cab control electronic systems during cranking This is because the cab electrical system is fed from the battery through the MFJB, and no longer from the starter Separate starter cables provide both higher voltage levels and cleaner power during cranking Additionally, there are improvements in circuit protection, and starter connection integrity (fewer circuits to connect at the starter stud) 505 — Powertrain PDM, Module 286 The Powertrain Power Distribution Module (PT-PDM) is dedicated to providing battery and ignition power to the engine (ECM), after treatment device (ATD), transmission (TCU), as well as other powertrain-related circuits It is mounted in the engine compartment, above the quarter fender on the driver side of the vehicle 506 — Load Disconnect Switch, Module 293 The load disconnect switch is used to disconnect (or open) the connection between the battery and the MFJB Turning the load disconnect switch to the off position does not disconnect the batteries from the starter NOTE: If the engine is running, turning the load disconnect switch to the OFF position will not shut off the engine The powertrain PDM still gets battery voltage from the emergency power feed on the SAM system The load disconnect switch is mounted on one of three locations: • Inside the cab on the left side of the driver’s seat on a left-hand-drive vehicle • On the battery box • Outboard-mounted on the left frame rail 507 — Trailer PDM, Module 296 The trailer PDM is used to supply trailer power to the chassis-mounted trailer receptacles The SAM Chassis supplies control outputs to the remote trailer PDM The trailer PDM is powered through the vehicle’s battery system The SAM Chassis does not supply battery power to the trailer PDM See Fig G02.01/2 Cascadia Troubleshooting Manual, August 2007 Electrical System and Main PDM Overview G02.01 508 — PDM Diagram PT−PDM SAM Cab Emergency Power Feed SAM Chassis Trailer PDM Inverter MFJB MGJB Load Disconnect Switch 04/24/2007 f545016 Fig 1, PDM Diagram 509 — Related Subjects • G02.04 — SAM Cab • G02.05 — SAM Chassis • P01.01 — Starting and Charging Cascadia Troubleshooting Manual, August 2007 G02.01/3 G02.01 Electrical System and Main PDM Overview 600 — Component Locations f001175 06/20/2007 SAM Cab Powertrain PDM SAM Chassis Main Ground Junction Block MEGA Fuse Junction Block Load Disconnect Switch Trailer PDM Fig 2, Component Locations G02.01/4 Cascadia Troubleshooting Manual, August 2007 G02.01 Electrical System and Main PDM Overview 601 — Component Details X18 X21 X19 R11 X20 R7 F22 F1 R1 F19 R3 X4 F29 X1 X5 X14 X2 X15 X6 X3 X16 X7 X17 X8 R14 X9 F40 R15 NOTE: The square labels indicate fuses and relays, and the circular labels indicate connectors F13 F18 R6 F28 R10 f545092 09/19/2007 Fig 3, SAM Cab Fuses and Relays (top) Cascadia Troubleshooting Manual, August 2007 G02.01/5 G02.01 Electrical System and Main PDM Overview 01/25/2007 f544954 Fig 4, SAM Chassis 06/20/2007 f545017 Position Position Position Position Position Supply Fig 5, MEGA Fuse Junction Block G02.01/6 Cascadia Troubleshooting Manual, August 2007 Electrical System and Main PDM Overview 05/18/2007 G02.01 f545054 Fig 6, Powertrain PDM 700 — Possible Causes • Water Intrusion • Voltage Spikes • Short Circuits • Missing Fuse/Relay • Incorrect Fuse Rating 701 — Diagnostic Tools Required • Digital Multimeter 702 — Diagnosis Refer to the schematic in modules 280 and 285 for an overview of the vehicle power distribution system for troubleshooting Use Table 1to cross reference the individual modules for each subsystem Cascadia Troubleshooting Manual, August 2007 G02.01/7 G02.01 Electrical System and Main PDM Overview Power Distribution with Module Numbers Source Input/Output Device Battery Node Module Starter Bat Terminal Starter Motor — 155 Alternator Bat Terminal Alternator — 125 Grid Heater Heater Element — 12C — 295 SAM Cab — 32A SAM Chassis — 32K Jump Start Post Battery Secondary Battery — Emergency Power Supply Load Disconnect Switch MFJB Powertrain PDM 286 SAM Cab 32A SAM Chassis 32K Trailer PDM 296 Inverter 337 Table 1, Power Distribution with Module Numbers 800 — SAM Cab Fuses and Relays SAM Cab Relays Part Name R1 PWR FD SPARE and 3, BAT R2 PWR FD SPARE and 4, BAT R3 HEATED SEAT, IGN R4 DASH PWR RCPT and 2, BAT R5 FLT MGM SYS and CB, BAT R6 PWR RCPT3 and STD HVAC, BAT R7 DRV INFO/GAUGE, IGN R8 ICU/VEHICLE SYS, IGN R9 AMPLIFIER PWR, ACC R10 MIRROR HEAT R11 PWR RCPT / FRIG, BAT R12 PWR RCPT 5, BAT R13 CAB LIGHTING, BAT R14 PWR RCPT4/CIR FAN/LAMP, BAT R15 PWR WINDOW, ACC Table 2, SAM Cab Relays G02.01/8 Cascadia Troubleshooting Manual, August 2007 Electrical System and Main PDM Overview G02.01 SAM Cab Fuses Part Name F1 PWR FD SPARE and (30A) F2 CAB/SLPR HVAC CTRL/SHF PNL (15A) F3 PWR FD SPARE and (30A) F4 MSF (15A) F5 OBD J1939—BAT (10A) F6 DASH PWR RCPT (15A) F7 DASH PWR RCPT (15A) F8 PHONE/RADIO—BAT (15A) F9 AMPLIFIER PWR (20A) F10 CAB HVAC MTR (30A) F11 SLPR HVAC MTR (30A) F12 DR CTRL L (20A) F13 DR LOCK/SM CRUISE (20A) F14 FLT MGM SYS and CB (25A) F15 SLPR PWR RCPT (20A) F16 STAND ALONE HVAC (7.5A) F17 SLPR PWR RCPT (20A) F18 TELEMATICS/WARNING SYS (15A) F19 HEATED SEAT (20A) F20 CGW (2A) F21 AREA LIGHT (15A) F22 ICU—BAT (5A) F23 DR INF /GAUGE (15A) F24 ICU—IGN (10A) F25 DASH SPLICE PACK (7.5A) F26 SRS—AIRBAG (5A) F27 MIRROR HEAT L (10A) F28 MIRROR HEAT R (10A) F29 SAM RELAY COILS (3A) F30 PWR RCPT / FRIG (20A) F31 SLPR PWR RCPT (20A) F32 PWR FD SPARE and (25A) F33 SPOT LIGHT (20A) F34 BAGGAGE COMP LAMP (3A) F35 DOMELAMP CAB (15A) F36 AUX CIR FAN/RD LAMP (15A) F37 CLK/DRV INFO/CD/KEYLESS (15A) Cascadia Troubleshooting Manual, August 2007 G02.01/9 P04.01 Cruise Control Clock Spring Connector 10 05/15/2007 f545040 Pin Function Air Bag (+), if used Air Bag (–), if used Not Used Backlighting Ground Steering Wheel, Right Switch Signal (S1) Backlighting PWM Steering Wheel, Left Switch Signal (S2) Not Used Horn Signal 10 Horn Table 2, Clock Spring Connector 12 B E 4 5 11 14 6 12 15 10 13 D B B B B C 3 3 f544920 04/30/2008 A B C D E A B 12 12 12 Steering Wheel Switch and Pinout MSF Slave Sub Bus Pinouts Stalk Switch Pinout Battery and Cabin CAN Pinout Rotary Switch Pinout Fig 3, MSF Master Cascadia Troubleshooting Manual, September 2008 P04.01/5 P04.01 Cruise Control 02/07/2007 f544945 Fig 4, SAM Cab 4 06/18/2008 Connector Connector Connector Connector (15 (18 (21 (18 f545325 pin) pin) pin) pin) Fig 5, Common Powertrain Controller 700 — Required Tools • ServiceLink • DDDL (Detroit Diesel and Mercedes engines) P04.01/6 Cascadia Troubleshooting Manual, September 2008 P04.01 Cruise Control 701 — Possible Causes • Incorrect parameter for the SAM Cab • Incorrect parameter for the CPC • Wiring, connections • Switches 702 — Fault Codes CAN Faults, MSF SA 49 49 SPN 520203 520203 Fault Description FMI Fault Trigger Steering wheel switch pin S1 — Voltage above normal, or shorted to high Trigger: Open or short circuit to battery power on the steering wheel switch pin S1 The two conditions cannot be differentiated by the ECU Vehicle Behavior: The steering wheel switch is without function Action: Check the wiring and connector Steering wheel switch pin S1 — Voltage below normal, or shorted to low Trigger: Short circuit to ground on steering wheel switch pin S1 Vehicle Behavior: The steering wheel switch is without function Action: Check the wiring and connector Table 3, CAN Faults, MSF 703 — Diagnostic Tests Verify the SAM Cab and CPC (where applicable) parameters are configured correctly NOTE: Some Cruise Control Disengage parameters from the SAM Cab may be dropping cruise control unexpectedly, even though it is working as programmed For example, the cruise control drops off when the wipers are ON Are the parameters set correctly? !Go to test NO ! Update the parameters as needed YES Open Datalink Monitor template "Cascadia Cruise Control" in ServiceLink, and verify the operation of the switch inputs and interlocks Are the inputs and interlocks functioning correctly? !Go to test NO ! Troubleshoot the switch inputs and/or interlocks Refer to G02.04 — SAM Caband G02.06 — ModuYES lar Switch Fieldfor more information Use Datalink Monitor template "Cascadia Cruise Control" to troubleshoot the status messages from the engine controller Are the control messages from the engine reflecting the state change when the input switches are operated? Cascadia Troubleshooting Manual, September 2008 P04.01/7 P04.01 Cruise Control ! NO ! Use the engine OEM diagnostic software for troubleshooting the engine controller YES Perform a functional check of the cruise control Be sure to double check the possible interlocks (hazard lights, headlights, and wipers) 800 — Parameters Parameters Module Part Number Description 002 447 18 58 Cruise control disengage input not present PARM-CAB, CRC, NO CNT 002 447 19 58 Disengage with hazard lights, headlights, or wipers on PARM-CAB, CRC, DIS, HDL, WW 002 447 20 58 Disengage with hazard lights or wipers on PARM-CAB, CRC, DIS, WW 002 447 21 58 Disengage with hazard lights or headlights on PARM-CAB, CRC, DIS, HDL 149 Parameter ECU SAM Cab Table 4, Parameters P04.01/8 Cascadia Troubleshooting Manual, September 2008 Virtual Technician P04.02 Table of Contents System Overview Terms and Abbreviations 500 General Information 501 Modes of Operation 502 Components Component Locations 600 Component Details 601 Troubleshooting Diagnostic Overview Fault Codes DL1 and DL2 Alternate Functionality External Antennas Updating Firmware Vehicle Fault Monitoring Ring Buffer Files 700 701 702 703 704 705 706 Specifications Virtual Technician ECU Connector Reference 800 Cascadia Troubleshooting Manual, September 2011 Virtual Technician P04.02 500 — Terms and Abbreviations CSC—Customer Support Center ECM—Engine Control Module ECU—Electronic Control Unit FMI—Failure Mode Indicator The part of a J1587, J1939, and CAN fault code that identifies how part of a device, or item on a device, failed GPS—Global Positioning System GSM—Global System for Mobile Communications; the cellular telephone network LED—Light-Emitting Diode OTA—Over the Air; OTA refers to software updates made to the Virtual Technician system over the GPS system Parameter—A parameter is a specific value that is assigned to a feature or function of the vehicle, and allows the customer to choose how that particular feature or function will work on the vehicle SA—Source Address, indicates any device that communicates on J1939 SPN—Suspect Parameter Number The part of a J1939 or CAN fault code that identifies how part of a device, or item on a device, failed VT—Virtual Technician 501 — General Information The Virtual Technician (VT) ECU generates diagnostic information to aid Detroit Diesel and the technician in diagnosing complex engine control issues The system creates sensor log files, captures fault codes, and sends alert messages and other advanced diagnostic information to the Detroit Diesel Customer Support Center The ECU utilizes GPS navigation, GSM (cellular telephone) communication, and a J1939 connection for databus monitoring Virtual Technician does not require any driver input to function The ECU is located behind the sunglass holder on the passenger side of the overhead console, and is mounted to a bracket via hook and loop tape See Fig The ECU can safely be removed from the mount while remaining wired into the vehicle for visual diagnostic purposes 502 — Modes of Operation There are three modes of operation for the Virtual Technician ECU: • Registration Mode: The vehicle identification number (VIN), engine serial number, and GPS ID are gathered at the manufacturing facility in this mode Registration mode also occurs when a new unit is installed at the dealership • Normal Operation Mode: This mode occurs after electronic registration of the unit In this mode, the ECU gathers fault codes, ring buffer files, and GPS data This mode monitors the databus for general information and fault codes Transmission of this information to Detroit Diesel generally occurs within minutes of collection depending on GSM network availability Normal mode also allows for over-the-air updates of VT firmware • Dormant Mode: In dormant mode, activity and data usage is minimized or eliminated This mode is activated only by remote modification of the firmware settings by the CSC This may occur if the VT subscription ends Cascadia Troubleshooting Manual, September 2011 P04.02/1 P04.02 Virtual Technician A GSM DL1 DL2 GSM GPS STATUS AUX B TAMPER GPS 04/04/2011 f545755 A Top View B Side View (connectors shown) Fig 1, Virtual Technician ECU 600 — Component Locations NOTE: The Virtual Technician is located in the overhead console, behind the sunglass holder 04/07/2011 f545757 Fig 2, Sunglass Holder P04.02/2 Cascadia Troubleshooting Manual, September 2011 P04.02 Virtual Technician GSM DL1 DL2 GSM GPS STATUS AUX 04/13/2011 f545759 GSM Antenna Fig 3, Virtual Technician ECU, Installed 601 — Component Details 08/08/2011 f545794 Passenger-Side Cab Door Overhead Commodity Harness Antenna Cable Antenna Pigtail Connector Fig 4, Antenna Connector (daycab) Cascadia Troubleshooting Manual, September 2011 P04.02/3 P04.02 Virtual Technician 08/02/2011 f545761a Right-Hand Sleeper Dome Light Interior Wiring GPS Antenna Dome Light Mounting Bracket Fig 5, Dome Light Connections 08/08/2011 f545793 Antenna Mounting Nut Antenna Bracket Fig 6, External Antenna (daycab) 700 — Diagnostic Overview All testing of the GPS and cellular reception must be done outside, and at a distance of at least 40 feet (12 meters) from any buildings This ensures adequate GPS signal strength and good cellular reception P04.02/4 Cascadia Troubleshooting Manual, September 2011 P04.02 Virtual Technician Diagnosing Virtual Technician requires access to the ECU to view the LEDs on the unit The LEDs provide diagnostic information needed by the technician and the CSC (Customer Support Center) To access the unit, remove the sunglass holder from the passenger side of the overhead console and detach the VT box from the hook and loop tape mounting To diagnose the unit, turn the ignition to the ON position There are seven LEDs visible on the VT ECU module If no LEDs light up with the ignition ON, diagnose supplied power and ground to the unit See Table Diagnostic LEDs Name DL1 DL2 Color Red Red and Green Function Action Red Blink (1Hz): J1708 connectivity (disabled) No Red is the normal and J1708 activity detected (device is awake) Device is Expected state not wired for J1708 connectivity Red Blink (1Hz): J1939 connectivity No J1939 activity detected (device is awake) Green Blink (1Hz): J1939 activity detected (device is awake) Green blink is expected, if LED is blinking red diagnose J1939 connectivity issue at the terminals GSM Green Solid: GPS connection successful Solid is expected – if One Blink: Initializing Two Blinks: Acquiring time otherwise call the CSC for zone information further instruction Three Blinks: Attempting to make a GPS connection GPS Green Solid: Satellites acquired One Blink: Acquiring satellites Refer to J1939 Fault codes if problem is suspected Green Solid: Engine running One Blink: Engine not running; no data to send Two Blinks: Data is available to be sent Four Blinks: GPS storage log is full Refer to J1939 Fault codes if problem is suspected Status AUX Red Tamper Red Solid: GSM Modem Comm Error, or panic line is active Two Blinks: Not Used Three Blinks: GSM modem Refer to J1939 Fault codes is not starting up if problem is suspected Four Blinks: SIM Card read error Five Blinks: GSM CTS (clear-to-send) line is active Disabled N/A Table 1, Diagnostic LEDs Cascadia Troubleshooting Manual, September 2011 P04.02/5 P04.02 Virtual Technician 701 — Fault Codes NOTE: The VT ECU source address (SA) is usually 74 Due to the addition of other telematics devices, SA 74 may be taken by another ECU In this case the VT ECU will be assigned another source address This has no effect on the operation of the ECU or the vehicle Fault Codes Fault Sim Card Error SPN FMI 524283 Details Action 11 Installed SIM Card Contact CSC/ cannot be read Replace ECU GPS Shorted 524286 Check the antenna cable; Center lead shorted to ground replace GPS Antenna if or cable ground necessary GPS Not Connected 524286 Antenna open or cut Attach GPS Antenna Replace Antenna if wiring damaged NAND Full 524285 Full Contact CSC/ Replace ECU NAND ++Checksum Error 524285 Error Contact CSC/ Replace ECU NAND I/O Error 524285 11 Cannot read/write Contact CSC/ Replace ECU uSD Full 524284 Full Contact CSC/ Replace ECU uSD Checksum Error 524284 Read/write error Contact CSC/ Replace ECU uSD I/O Error (micro SD) 524284 11 Cannot read/write Contact CSC/ – not present Replace ECU RTC Error (real time clock) 524282 11 VTECU RTC out of range Contact CSC/ Replace ECU Table 2, Fault Codes 702 — DL1 and DL2 Alternate Functionality These LEDs indicate other behavior than those indicated at startup: • Fast alternating red DL1 and DL2 blinks: indicates that the device is booting • Fast-alternating green DL1 and DL2 blinks: indicates that a new firmware file is detected and is being loaded • Solid red DL1 and OFF (dark) DL2: indicates that the device is updating the vehicle interface firmware 703 — External Antennas There are two SMA connectors on the VT ECU module One connector is for an external GPS antenna, and the other is for an external GSM antenna The GSM antenna is mounted directly to the ECU P04.02/6 Cascadia Troubleshooting Manual, September 2011 Virtual Technician P04.02 704 — Updating Firmware The approved method for updating the VT ECU firmware is through an over-the-air (OTA) update OTA updates occur when VT is sent a firmware file over the GSM connection This allows remote programming of modules in the field If a software issue is suspected, contact the Detroit Diesel Customer Support Center for further diagnostics The OTA process begins by scheduling the device to update to Zonar and Daimler approved firmware Once the OTA update is scheduled the device uploads the necessary data The download occurs when the ignition wire is powered off and the device is no longer seeing engine RPM data The OTA process is underway when the Tamper, Aux, Status, GSM and GPS LEDs all blink together at a 1hz rate The device must stay powered on while the OTA update is downloading Cycling the ignition will not interrupt an OTA update The module will stop downloading only if power is removed from the unit Data is not collected during an OTA update 705 — Vehicle Fault Monitoring When the VT ECU receives a new fault code, it compares the received message to a list stored internally If the fault code is already on the list, it will be ignored New fault codes are added to the list and the appropriate information is uploaded to the Zonar server If the fault code is a ring buffer trigger, a ring buffer will be created and uploaded along with the normal fault data 706 — Ring Buffer Files The VT ECU is capable of generating diagnostic ring buffer files A ring buffer file is a recording of J1939 databus activity over a predefined period This information is sent directly to the CSC for analysis Cascadia Troubleshooting Manual, September 2011 P04.02/7 P04.02 Virtual Technician 800 — Virtual Technician ECU Connector Reference Power Connector Connector Pin 4-Pin Name Type Power Minimum Input Maximum VDC 30 VDC Notes Requires External Fuse Ignition Input VDC 30 VDC Requires External Fuse VDC = Logic 1.8 VDC = Logic Ground — VDC VDC — Panic Switch Input VDC VDC Ground Closure Switch Only Table 3, Power Connector Expansion and Diagnostics Connector Connector 6-Pin Pin Name Type Minimum Maximum Notes RS-232 TX Output -15 VDC 15 VDC Proprietary Ground — VDC VDC — 5V Supply Output VDC VDC — RS-232 RX Input -15 VDC 15 VDC Proprietary DSR-IN Input -15 VDC 15 VDC — VDC Ground Closure Switch Only Panic Switch Input VDC Table 4, Expansion and Diagnostics Connector 12 10 6 04/04/2011 f545754 Fig 7, ECU Connector Reference P04.02/8 Cascadia Troubleshooting Manual, September 2011 P04.02 Virtual Technician EVIR Connector Connector 8-Pin Pin Name Type Minimum Maximum Notes RS-232 TX Output -15 VDC 15 VDC Proprietary CTS IN Input -15 VDC 15 VDC — DSR OUT Output -15 VDC 15 VDC — Power Out Output — — System Supply Voltage, Unregulated NC — — — — Ground — — — — NC — — — — RS-232 RX Input -15 VDC 15 VDC Proprietary Table 5, EVIR Connector General Purpose I/O Connector Connector 12-Pin Pin Name Type Minimum Maximum Notes GPIO Input VDC 30 VDC VDC = Logic 1.8 VDC = Logic GPIO Input VDC 30 VDC VDC = Logic 1.8 VDC = Logic GPIO Input VDC 30 VDC VDC = Logic 1.8 VDC = Logic SPI-IN Input 3.3 VDC Proprietary SPI-OUT Output 3.3 VDC Proprietary SPI-CLK Output 3.3 VDC Proprietary GPIO Input VDC 30 VDC VDC = Logic 1.8 VDC = Logic GPIO Input VDC 30 VDC VDC = Logic 1.8 VDC = Logic SPI-CS Output 3.3 VDC Proprietary 10 Relay Output — 2A Open Drain Output 11 Ground — — — — 12 3.3V Supply Output 3.3 VDC 3.3 VDC — Table 6, General Purpose I/O Connector Cascadia Troubleshooting Manual, September 2011 P04.02/9 P04.02 Virtual Technician Vehicle Communication Connector Connector 10-Pin Pin Name Type Minimum Maximum Notes J1939 –H — –27 VDC 40 VDC — CAN-Shield — VDC VDC J1939, –11 Only J1708 (–) — — — NC — — — — NC — — — — J1939 –L — –27 VDC 40 VDC — J1708 (+) — — — Disabled NC — — — — NC — — — — 10 Ground — VDC VDC — Table 7, Vehicle Communication Connector P04.02/10 Cascadia Troubleshooting Manual, September 2011 ... RH Headlamp High Beam 11/20/2006 f543944a Fig 1, Example of Multiplexed System with ECUs and Electrical Components The multiplexed electrical system on this vehicle combines traditional power distribution... • G03.04 — Datalink, Diagnostic CAN G02.03/4 Cascadia Troubleshooting Manual, November 2007 G02.03 Central Gateway 507 — Datalink Network Topology Cascadia Network Topology Diagnostic CAN (500kbps)... documentation, available in ServiceLink’s "Help" menu Cascadia Troubleshooting Manual, March 2010 G02.04/3 G02.04 SAM Cab 507 — Datalink Network Topology Cascadia Network Topology Diagnostic CAN (500kbps)