Principles of Operation
The vehicle has three module communication networks: one high speed and one medium speed CAN network, which are comprised of unshielded twisted pair cable, and the international standards organization (ISO) 9141 communications network, which is a single wire network. All three networks are connected to the data link connector (DLC). This makes diagnosis and testing of these systems easier by allowing one diagnostic tester to be able to diagnose and control any module on the three networks from one connector. The DLC can be found under the instrument panel between the steering column and the radio.
The high speed and medium speed CAN will remain operational even with the severing of one of the bus wires. Communications will also continue if one of the bus wires is shorted to ground or voltage. If any of the termination resistors are lost, communication will not be possible.
The ISO 9141 communications network does not permit intermodule communication. When the WDS or equivalent Tester communicates to modules on the ISO 9141 communication network, the WDS or equivalent Tester must ask for all information; the modules cannot initiate communications.
The ISO 9141 communications network will not function if the wire is shorted to ground or battery voltage. Also, if one of the modules on the ISO 9141 communications network loses power or shorts internally, communications to that module will fail.
Vehicle Identification (VID) Block
Some PCMs contain a memory area called a VID block. The PCM VID block may contain the factory settings for the configurable modules unless the PCM is flashed with a new calibration, in which case some PCM parameters may be modified.
As-Built Data Center
The As-Built Data Center maintains a record of the vehicle configuration in a database. The vehicle identification number (VIN) is required to obtain this information. The As-Built Data Center records the applicable module configurations stored in each module before the vehicle leaves the factory. The As-Built Data Center will always reflect the original build of the vehicle as it left the factory. Only contact the As-Built Data Center when directed to do so by the diagnostic tool.
| Module | Calibration Updatable | PMI | Programmable Parameter |
|---|---|---|---|
| Instrument cluster | No | Yes | Oil change reminder Not in park chime Turn signal on reminders Park brake on chime Button press chime Default language |
| Anti-lock brake system (ABS) module | No | Yes | Tire size (revolutions per miles) |
| Smart junction box (SJB) | No | Yes | Smart unlocking Central unlock with key cylinder Headlight battery save timeout Perimeter anti-theft Heated backlight timeout Headlight type Front fog lighting Daytime running lights Drive configuration Door lock inhibit Two state unlock toggle |
| Powertrain control module (PCM) | Yes | Yes | Tire/wheel size Axle ratio Transmission type 4WD present |
PROGRAMMABLE PARAMETERS INDEX
The SJB is located under the front passenger-side floor console. For removal information, see SMART JUNCTION BOX (SJB). For additional information on interior lamps and illuminated entry, see INTERIOR LIGHTING. For additional information on exterior lighting, see TROUBLESHOOTING (LIGHTING SYSTEMS). For additional information on power door locks, keyless entry keypad and RKE, see LOCKS, LATCHES AND ENTRY SYSTEMS. For additional information on the rear windshield wiper, see WIPERS AND WASHERS. For additional information on anti-theft, see ANTI-THEFT SYSTEM. For additional information on the climate control system, see CLIMATE CONTROL SYSTEM. For additional information on the warning chimes, see GAUGES AND WARNING DEVICES.
| Diagnostic Tool Message | Explanation | Action |
|---|---|---|
| Unable to Retrieve VIN from vehicle - Enter the VIN below. | PCM VIN area blank. | Enter VIN using WDS or equivalent Tester. |
| This module has not been configured - Reinstall original module to retrieve config. data - If old module is not available, continue for backup data. | Module was replaced before retrieving configuration data from suspect module DTC B2477. | Install the original module and retrieve configuration data. If the original module is currently in the vehicle, continue with the routine to retrieve backup data from the PCM. Continue with the routine to extract backup data from the PCM. |
| Data previously stored for the following vehicle VIN# - Data will be lost if you continue - Press trigger to continue. | The WDS or equivalent Tester has configuration data stored for the same module that could be overwritten. | Make sure that data already stored on WDS or equivalent Tester is not needed, then continue with routine to retrieve configuration data. |
| This module is not configurable - See service manual for info | The module has no configuration information. | Make sure module supports programmable module installation. See Module Configuration Index. |
| Unable to retrieve (XXX) data from (XXX) module. Unable to locate (XXX) backup data in PCM. Call Mazda Technical Hotline. PCM requires programming. | The module returned DTC B2477 and the PCM did not have backup data. | Make sure module is listed on the Module Configuration Index and that it supports as-built data. Only if Mazda Technical Hotline supports the module, contact the Mazda Technical Hotline. |
| No data available for module - Select retrieve module config. to obtain vehicle data. | The restore routine was run without retrieving configuration data. The WDS or equivalent Tester memory storing configuration data has expired. | See PROGRAMMABLE MODULE INSTALLATION, to retrieve module configuration data. |
| Unable to retrieve VIN from vehicle - Enter the last five characters of VIN below. | The WDS or equivalent Tester was unable to extract VIN for verification. | Enter the last five characters of the VIN. |
| VIN mismatch for stored data. VIN ##### Current VIN ##### - If you continue, data may not match intended configuration. | The VIN was entered incorrectly. The VIN assigned to the data stored in the WDS or equivalent Tester does not match the VIN number of the vehicle that is attempting to utilize the configuration data. | Exit the routine and attempt to retrieve module configuration data entering the correct VIN. |
| Entered data is not valid. | Vehicle data was incorrectly entered. Module configuration data was incorrectly entered. | See Mazda Technical Hotline information and enter the correct module configuration. |
| Unable to verify download - See service manual for info. | The module will not allow the WDS or equivalent Tester to verify the correct information was configured. | Exit the routine and verify correct information manually. |
| Block data is not valid for the vehicle - Clear block 1 and re-enter. | Block data entered for the module is not correct. | See Mazda Technical Hotline information and enter correct data for each block. |
| Data is not valid for the entered VIN - Check VIN and re-enter. | The VIN was entered incorrectly. | Exit the routine and re-run the routine entering the correct VIN. |
DIAGNOSTIC TOOL MESSAGE INDEX
Normal Operation
The PCM communicates with the diagnostic tool through the high speed CAN communications network, circuits (W) and (B). If one of the bus wires becomes shorted to ground or voltage, communications can continue at a reduced level. The PCM and instrument cluster share network termination responsibilities with the use of a split termination resistor in each module. If either of these termination resistors is lost, network communications will not be possible. Check circuits (W) and (B) between the PCM 0140-175b and the data link connector (DLC) D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC D-01, damage to the PCM 0140-175b, or a problem in an in-line connector.
The RCM communicates with the diagnostic tool through the ISO 9141 communications network circuit (LB/W). If circuit (LB/W) becomes open or shorted to ground, communications to that module will not be possible. Check circuit (LB/W) between the RCM 0810-101 and the DLC D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in the ISO network circuit, damage to the DLC D-01, or damage to the 0810-101.
The ABS module communicates with the diagnostic tool through the high speed CAN communications network, circuits (W) and (B). If one of the bus wires becomes shorted to ground or voltage, communications can continue at a reduced level. Check circuits (W) and (B) between the ABS module 0413-101 and the DLC D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC D-01, damage to the ABS module 0413-101, or a problem in an in-line connector.
The 4WD control module communicates with the diagnostic tool through the high speed CAN communications network, circuits (W) and (B). If one of the bus wires becomes shorted to ground or voltage, communications can continue at a reduced level. Check circuits (W) and (B) between the 4WD control module 0318-01 and the DLC D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC D-01, damage to the 4WD control module 0318-01, or a problem in an in-line connector.
The RCM communicates with the diagnostic tool through the ISO 9141 communications network circuit (LB/W). If circuit (LB/W) becomes open or shorted to ground, communications to those modules will not be possible. Check circuit (LB/W) between the RCM 0810-101 and the DLC D-01. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in circuit (LB/W), damage to the DLC D-01, damage to the RCM or a problem in one of the in-line connectors. If, after individual checks of each circuit leading to a module show resistance values less than 5 ohms and no in-line connector issues present, the data link diagnostics test must be run with the module in question disconnected. If the data links diagnostics test passes with the module in question disconnected, the module is the source of the concern. A new module should be installed.
The medium speed CAN has an unshielded twisted pair cable, circuits (W/O) and (P/O). The SJB and the instrument cluster are the only modules on the medium speed CAN. Total network resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the medium speed CAN circuits, damage to the DLC D-01, damage to one of the network module connectors, or damage to an in-line connector. Since both the SJB and the instrument cluster share network termination responsibilities, a problem in either of these modules can result in a medium speed CAN failure.
The high speed CAN has an unshielded twisted pair cable, circuits (W) and (B). The PCM, ABS module, 4WD control module and the instrument cluster are all on the high speed CAN. Total network resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the high speed CAN circuits, damage to the DLC D-01, damage to one of the network module connectors, or damage to an in-line connector. Since both the PCM and the instrument cluster share network termination responsibilities, a problem in either of these modules can result in a high speed CAN failure.
The diagnostic tool is connected to the DLC D-01 to communicate with both the high speed and medium speed CAN as well as the ISO 9141 communication networks. If communication cannot be established, the diagnostic tool and the DLC D-01 must be checked for damage. If the diagnostic tool and the DLC D-01 are OK, circuits (O/LG), (B/LB), and (B) must be checked for an open condition.