Mazda 2: M-MDS and Vehicle Not Communicating [Multiplex Communication System]
Mazda 2 2007-2014 Service Manual / Body and Accessories / M-MDS and Vehicle Not Communicating [Multiplex Communication System]
CAUTION:
- Perform the following on-board diagnosis according to FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] troubleshooting procedure.
Detection Condition
- Possible causes of communication errors between the M-MDS and vehicle include communication circuit interruption due to an open circuit in the CAN communication wiring harness, or poor contact of connector terminals, or a BUS OFF condition due to a short circuit in the CAN communication wiring harness.
Possible Causes
- Open circuit in wiring harness between PCM and DLC-2
- Open circuit in BCM CAN line
- Improper insertion, connector terminal damage, deformation, corrosion, or disconnection of PCM, BCM, or connector C-03
- Short circuit in wiring harness between CAN system-related module CAN_L and CAN_H lines
- Short circuit to power supply in wiring harness between CAN system-related module
- Short circuit to ground in wiring harness between CAN system-related module
- Short circuit to power supply in CAN system-related module internal CAN lines
- Short circuit to ground in CAN system-related module internal CAN lines
- Damage, deformation, corrosion, or disconnection of DLC-2
- PCM power supply is not normal
- PCM ground is not normal
- PCM internal resistance is not normal
- CAN system-related module malfunction
Wiring Diagram
Diagnostic Procedure
CAUTION:
- When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.
DTC U0001:88, U0073:00
Diagnostic procedure
CAUTION:
- When disconnecting the connector, verify that there is no looseness, damage, deformation, corrosion, or poor connection of the connector terminals.
READ NEXT:
ON-Board Diagnostic Wiring Diagram [Instrument Cluster]
DTC INSPECTION [Instrument Cluster]
1. Connect the M-MDS (IDS) to the DLC-2.
2. After the vehicle is identified, select the following items from the
initialization screen of
the IDS.
Select "S
DTC Table [Instrument Cluster]
*1 Vehicles with tire pressure monitoring system
*2 ATX
DTC B1A84:41/U0300:00
Diagnostic Procedure
DTC B1A84:51/U2100:00
Diagnostic Procedure
DTC P0070:14
System Wiring Diagram
Diagnostic P
ON-Board Diagnostic Wiring Diagram [BCM]
DTC INSPECTION [BCM]
1. Connect the M-MDS (IDS) to the DLC-2.
2. Verify the following vehicle conditions:
Switch the ignition to ON.
All the switches are turned off (except the ignition switch)
SEE MORE:
Rear Door Trim
REAR DOOR TRIM REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Remove the sail inner garnish. (See SAIL INNER GARNISH REMOVAL/INSTALLATION)
3. Pull the cover of inner handle while remove the tabs.
4. Remove the screw.
5. Pull in the direction of the arrow shown in the figure and
Control Valve Body
CONTROL VALVE BODY REMOVAL/INSTALLATION
On-Vehicle Removal
WARNING:
Using compressed air can cause dirt and other particles to fly out,
causing injury to the
eyes. Wear protective eyeglasses whenever using compressed air.
A hot transaxle and ATF can cause severe burns. Turn off the engine and
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