Description

Cruise control switch circuit malfunction

Detection condition

• Start stop unit detects any cruise control switch stuck on for 2 min or more with the ignition switched ON (engine off or on).

Fail-safe function

Not applicable

Possible cause

• Instrument cluster configuration error

• Clock spring connector or terminal malfunction

• Clock spring malfunction

• Start stop unit connector or terminal malfunction

• Short to power supply in wiring harness between start stop unit terminal 1Y and clock spring (start stop unit side) terminal J

• Cruise control switch malfunction

• Start stop unit malfunction

Step

Inspection

Action

1

• Using the M-MDS, perform the instrument cluster configuration (using As-Built data).

  (See INSTRUMENT CLUSTER CONFIGURATION (USING AS-BUILT DATA).)

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• Switch the ignition ON (engine off or on) and wait for 2 min or more.

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Using the M-MDS, perform the instrument cluster configuration (using As-Built data) again, then go to the next step.

(See INSTRUMENT CLUSTER CONFIGURATION (USING AS-BUILT DATA).)

No

Go to Step 8.

2

• Switch the ignition off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Disconnect the clock spring 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 the clock spring.

  (See CLOCK SPRING INSPECTION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

  (See CLOCK SPRING INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Is the clock spring normal?

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

• Disconnect the start stop 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.

5

• Verify that the start stop unit and clock spring connectors are disconnected.

• Reconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the clock spring (start stop unit side) terminal J (wiring harness-side).

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between start stop unit terminal 1Y and clock spring (start stop unit side) terminal J.

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 a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to Step 7.

6

• Inspect the cruise control switch.

  (See CRUISE CONTROL SWITCH INSPECTION [SKYACTIV-G 2.5].)

  (See CRUISE CONTROL SWITCH INSPECTION [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)

• Is the cruise control switch normal?

Yes

Go to the next step.

No

Replace the cruise control switch, then go to the next step.

(See STEERING SWITCH REMOVAL/INSTALLATION.)

7

• Always reconnect all disconnected connectors.

• Reconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Clear the DTC for the start stop unit using the M-MDS.

  (See CLEARING DTC [START STOP UNIT].)

• Switch the ignition ON (engine off or on) and wait for 2 min or more.

• Retrieve the start stop unit DTCs using the M-MDS.

  (See DTC INSPECTION [START STOP UNIT].)

• Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the start stop unit.

  (See START STOP UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

8

• Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [START STOP UNIT].)

No

DTC troubleshooting completed.