DTC U2527

id080200000100

System Malfunction Location

Detection Condition

Warning

•  Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.

Possible Causes

System Wiring Diagram

am3zzw00011062

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT DSC HU/CM CONNECTOR •  Switch the ignition to off. •  Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Disconnect the DSC HU/CM connector. •  Inspect the DSC HU/CM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). •  Is there any malfunction?	Yes	Repair or replace the terminal, then go to next step.
		No	Go to the next step.
2	INSPECT SAS CONTROL MODULE CONNECTOR •  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.) •  Disconnect all SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.) •  Inspect the SAS control module connector terminal for poor connection (such as damaged/pulled-out pins, and corrosion). •  Is there any malfunction?	Yes	Repair or replace the terminal, then go to next step.
		No	Go to the next step.
3	INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG MODULE AND SAS CONTROL MODULE •  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) •  Disconnect the clock spring connector. •  Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.) •  Disconnect the passenger-side air bag module connector. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side front seat connector. (See FRONT SEAT REMOVAL/INSTALLATION.) •  Remove the C-pillar trim. (See C-PILLAR TRIM REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side curtain air bag module connector (harness side). (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION.) •  Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.) •  Disconnect the lap pre-tensioner seat belt connector. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side pre-tensioner seat belt connector. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Inspect the wiring harness between SAS control module terminal 2Z and DSC HU/CM terminal AP, SAS control module terminal 2AA and DSC HU/CM terminal AM for the following: ―  Short to body ground ―  Open circuit ―  Short circuit between terminals Note •  Inspect for continuity while shaking the wiring harness between the DSC HU/CM and SAS control module. •  Is the wiring harness normal?	Yes	Go to the next step.
		No	Replace the wiring harness between the SAS control module and the DSC HU/CM, then go to next step.
4	INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DSC HU/CM FOR A SHORT CIRCUIT TO THE POWER SUPPLY •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Switch the ignition to ON with SAS control module and DSC HU/CM connector disconnected. •  Measure the voltage of SAS control module connector terminals 2Z and 2AA of SAS control module harness side connector. Note •  Measure the voltage while shaking the wiring harness between the SAS control module and DSC HU/CM. •  Is the voltage measured?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
		No	Replace the DSC HU/CM, then go to the next step. (See DSC HU/CM REMOVAL/INSTALLATION.)
5	PERFORM SAS CONTROL MODULE DTC INSPECTION •  Switch the ignition to off. •  Disconnect the negative battery cable and wait for 1 min or more. •  Disconnect the SST (Fuel and thermometer checker) or the 2 ohms resistance. •  Connect the driver-side air bag module connector. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Switch the ignition to ON. •  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC.) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION.) •  Are the same DTCs present?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
		No	DTC troubleshooting completed.