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:
Seat Precautions
WARNING
Make sure the adjustable components of a seat are locked in place:
Adjustable seats and seatbacks that are not securely locked are dangerous. In a
sudden
stop or collision, the seat or seatback could move, causing injury. Make sure
the
adjustable components of the seat are locked in
Road Test
WARNING:
When performing a road test, be aware of other vehicles, people,
impediments, etc. to avoid an accident.
NOTE:
When the legal speed limit must be exceeded, use a chassis dynamometer.
Road Test Preparation
1. Inspect the engine coolant. (See ENGINE COOLANT LEVEL INSPECTION).
2. Insp
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