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Home >> Mazda >> 2019 >> 6 Signature >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> On-Board Diagnostics - Instrument Cluster >> DTC U2105-02: Drive Selection Switch Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

DTC U2105:02 (INSTRUMENT CLUSTER) DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT DRIVE SELECTION SWITCH CONNECTOR
  • Switch the ignition to off.
  • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  • Disconnect the drive selection switch connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
Yes Go to the next step.
No Repair or replace the connector, then go to Step 6.
2 INSPECT FOR OPEN CIRCUIT IN DRIVE SELECTION SWITCH GROUND CIRCUIT
  • Verify that the drive selection switch connector is disconnected.
  • Inspect for continuity between drive selection switch terminal C (wiring harness-side) and body round.
  • Is there continuity?
Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between drive selection switch terminal C and body ground.
If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to Step 6.
3 INSPECT INSTRUMENT CLUSTER CONNECTOR
  • Disconnect the instrument cluster connector.
  • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
  • Is the connector normal?
Yes Go to the next step.
No Repair or replace the connector, then go to Step 6.
4 INSPECT FOR OPEN CIRCUIT IN DRIVE SELECTION SWITCH CIRCUIT
  • Verify that the drive selection switch and instrument cluster connectors are disconnected.
  • Inspect for continuity between instrument cluster terminal W (wiring harness-side) and drive selection switch terminal B (wiring harness-side).
  • Is there continuity?
Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between instrument cluster terminal W and drive selection switch terminal B. If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to Step 6.
5 INSPECT DRIVE SELECTION SWITCH Yes Go to the next step.
No Replace the drive selection switch, then go to the next step. (See DRIVE SELECTION SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .) (See DRIVE SELECTION SWITCH REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)] .)
 
6 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
7 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE (INSTRUMENT CLUSTER) .)
No DTC troubleshooting completed.