Mazda 2: DTC U0028:88
System Malfunction Location
- DSC HU/CM communication fault
Detection Condition
WARNING:
- Detection conditions are for understanding the DTC outline before
performing an inspection. Performing an
inspection with only detection conditions may cause injury due to an
operating error, or damage the system.
When performing an inspection, always follow the inspection procedure.
- Communication error to DSC HU/CM
Possible Causes
- DSC HU/CM connector malfunction
- SAS control module connector malfunction
- Open circuit in wiring harness between SAS control module and DSC HU/CM
- Short to power supply in wiring harness between SAS control module and DSC HU/CM
- Short to GND in wiring harness between SAS control module and DSC HU/CM
- DSC HU/CM malfunction
- SAS control module malfunction
System Wiring Diagram
Diagnostic Procedure
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System Malfunction Location
Detection Condition
WARNING:
Detection conditions are for understanding the DTC outline before
performing an
inspection. Performing an inspection according to only th
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System Malfunction Location
Detection Condition
WARNING:
Detection conditions are for understanding the DTC outline before
performing an
inspection. Performing an inspection according to only th
PID/DATA Monitor
PID/DATA MONITOR DISPLAY
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 "DataLogger".
Sel
SEE MORE:
Engine Control System Operation Inspection
Main Relay Operation Inspection
1. Verify that the main relay clicks when the ignition switch is turned to
the ON position, then off.
If there is no operation sound, inspect the following:
Main relay (See RELAY INSPECTION).
Wiring harness and connector between battery and main relay terminal
Manifold Absolute Pressure (MAP) Sensor
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION
1. Disconnect the negative battery cable.
2. Remove the fresh-air duct and the air cleaner as a single unit. (See
INTAKE-AIR SYSTEM REMOVAL/INSTALLATION).
3. Disconnect the MAP sensor connector.
4. Remove the MAP sensor
5. Install in
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