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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 163 (On-Board Diagnostic - Connectivity Master Unit) >> DTC B11BA-15; Steering Switch Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE

Step Inspection Action
1 INSPECT CLOCK SPRING CONNECTOR CONDITION Yes Go to the next step.
No Repair or replace the connector, then go to Step 7.
2 INSPECT CONNECTIVITY MASTER UNIT CONNECTOR CONDITION
  • Disconnect the connectivity master unit 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 7.
3 INSPECT CLOCK SPRING Yes Go to the next step.
No Replace the clock spring, then go to Step 7.
(See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] .)
(See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
4 INSPECT STEERING SWITCH CIRCUIT FOR SHORT TO POWER SUPPLY Yes Go to the next step.
No Refer to the wiring diagram and verify if there is a common connector between connectivity master unit terminal 1M and clock spring (instrument panel harness-side) terminal 1G.
If there is a common connector:
  • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location.
  • Repair or replace the malfunctioning location.

    If there is no common connector:

  • Repair or replace the wiring harness which is shorted to the power supply.

Go to Step 7.
5 INSPECT STEERING SWITCH CIRCUIT FOR OPEN CIRCUIT
  • Verify that the clock spring and connectivity master unit connectors are disconnected.
  • Switch the ignition off.
  • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
  • Inspect the wiring harness for continuity between the following terminals (wiring harness-side).
    • Connectivity master unit terminal 1M and clock spring (instrument panel harness-side) terminal 1G
      • Connectivity master unit terminal 1N and clock spring (instrument panel harness-side) terminal 1E
  • Is there continuity?
 Yes Go to the next step.
No Refer to the wiring diagram and verify if there is a common connector between the following terminals.
  • Connectivity master unit terminal 1M and clock spring (instrument panel harness-side) terminal 1G
  • Connectivity master unit terminal 1N and clock spring (instrument panel harness-side) terminal 1E

    If there is a common connector:

  • Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location.
  • Repair or replace the malfunctioning location.

    If there is no common connector:

  • Repair or replace the wiring harness which has an open circuit.

Go to Step 7.
6 INSPECT STEERING SWITCH Yes Go to the next step.
No Replace the steering switch, then go to the next step.
(See STEERING SWITCH REMOVAL/INSTALLATION .)
7 VERIFY THAT REPAIRS HAVE BEEN COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
8 VERIFY IF OTHER DTCs DISPLAYED
  • Are any other DTCs displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
(See DTC TABLE [CONNECTIVITY MASTER UNIT] .)
No DTC troubleshooting completed.
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