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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> On-Board Diagnostic - Dynamic Stability Control (DSC) >> DTC U3003-08; U3003-16 U3003-17; Power Supply Systems >> Diagnostic procedure

Diagnostic procedure

DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT BATTERY VOLTAGE
  • Is the battery positive terminal voltage normal?
Yes Inspect for normal connection of the battery terminals.
Go to the next step.
No Charge or replace the battery, then go to Step 7.
BATTERY RECHARGING (See.)
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
2 INSPECT BATTERY GRAVITY
  • Is battery specific gravity as specified?
Yes Go to the next step.
No Replace the battery, then go to Step 7.
(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
3 INSPECT CHARGING SYSTEM
  • Are the generator and the drive belt tensions normal?
Yes Go to the next step.
No Replace the generator and/or drive belt if necessary.
(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
(See DRIVE BELT REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Go to Step 7.
4 INSPECT FUSE CONDITION
  • Inspect the following fuses.
    • SRS1 7.5A
    • ABS/DSC S 30A
    • ABS/DSC M 50A
  • Is the fuse normal?
Yes Go to the next step.
No Replace the fuse, then go to Step 7.
5 INSPECT DSC HU/CM POWER SUPPLY FOR OPEN CIRCUIT
  • Disconnect the DSC HU/CM connectors.
  • Switch the ignition ON (engine off).
  • Measure the voltage between following connector terminals of the DSC HU/CM (vehicle harness-side) and body ground:
    • DSC HU/CM: A-Body ground
    • DSC HU/CM: B-Body ground
    • DSC HU/CM: Q-Body ground
  • Is the voltage 10 V or more?
Yes Go to the next step.
No Repair or replace the wiring harness, then go to Step 7.
6 INSPECT DSC HU/CM GROUND FOR POOR GROUND OR OPEN CIRCUIT
  • Switch the ignition to off.
  • Measure the resistance between the DSC HU/CM terminal AL (vehicle harness-side) and body ground.
  • Is the resistance within 0-1 ohm?
Yes Go to the next step.
No If there is open circuit:
  • Repair or replace the wiring harness, then go to the next step.

If resistance is not within specification:
  • Repair or replace the poor ground part, then go to the next step.
7 VERIFY THAT THE SAME DTC IS NOT PRESENT Yes Repeat the inspection from Step 1.
No Go to the next step.
8 VERIFY THAT NO OTHER DTCS ARE PRESENT
  • Are any other DTCs output?
Yes Go to the applicable DTC inspection.
(See DTC TABLE [DYNAMIC STABILITY CONTROL (DSC)] .)
No DTC troubleshooting completed.