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Home >> Mazda >> 2017 >> 5 GT, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> On-Board Diagnostic - Instrument Cluster >> DTC U3003-16: Instrument Cluster Power Supply Circuit Malfunction [Instrument Cluster] >> Diagnostic Procedure

Diagnostic Procedure

DTC U3003:16 (INSTRUMENT CLUSTER) DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 PERFORM PCM DTC INSPECTION Yes Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.5] .)
No Go to the next step.
2 INSPECT BATTERY Yes Recharge or replace the battery, then go to Step 6.
(See BATTERY RECHARGING [MZR 2.5] .)
(See BATTERY REMOVAL/INSTALLATION [MZR 2.5] .)
No Go to the next step.
3 INSPECT GENERATOR Yes Replace the generator, then go to Step 6.
(See GENERATOR REMOVAL/INSTALLATION [MZR 2.5] .)
No Go to the next step.
4 INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS
  • Switch the ignition to off.
  • Disconnect the negative battery cable.
  • Disconnect the instrument cluster connector.
  • Inspect the connector and terminals (corrosion, damage, pin disconnection).
  • Is there any malfunction?
Yes Repair or replace the connector or terminals, then go to Step 6.
No Go to the next step.
5 INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT AND SHORT TO GROUND
  • Verify that the instrument cluster connector is disconnected.
  • Reconnect the negative battery cable.
  • Measure the voltage at the following terminals (wiring harness-side):
    • Instrument cluster terminal U
      • Instrument cluster terminal S
  • Is the voltage B+?
Yes Go to the next step.
No Inspect the ROOM 15 A fuse and METER 10 A fuse.
If the fuse is blown:
  • Repair or replace the wiring harness for a possible short to ground.
  • Replace the fuse.

If the fuse is deteriorated:
  • Replace the fuse.

If the fuse is normal:
  • Repair or replace the wiring harness for a possible open circuit.

Go to the next step.
6 VERIFY TROUBLESHOOTING COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
7 VERIFY THAT NO OTHER DTCs ARE PRESENT
  • Are any DTCs present?
Yes Go to the applicable DTC inspection.
(See DTC TABLE [INSTRUMENT CLUSTER] .)
No DTC troubleshooting completed.