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DTC C0052:14 [START STOP UNIT]

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2016 – MX-5 – Body and Accessories

DTC C0052:14 [START STOP UNIT]

Description

Steering angle sensor A signal circuit malfunction

Detection condition

  • Start stop unit detects an open circuit or short to ground in the steering angle sensor A signal circuit.

Fail-safe

Not applicable

Possible cause

  • Steering angle sensor connector or terminal malfunction

  • Start stop unit connector or terminal malfunction

  • Short to ground in wiring harness between start stop unit terminal 1U and steering angle sensor terminal A

  • Open circuit in wiring harness between start stop unit terminal 1U and steering angle sensor terminal A

  • Steering angle sensor malfunction

  • Start stop unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1

INSPECT STEERING ANGLE SENSOR CONNECTOR CONDITION

  • Switch the ignition off.

  • Disconnect the negative battery cable.

    (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

  • Disconnect the steering angle sensor 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 START STOP UNIT CONNECTOR CONDITION

  • 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 6.

3

INSPECT STEERING ANGLE SENSOR A SIGNAL CIRCUIT FOR SHORT TO GROUND

  • Verify that the steering angle sensor and start stop unit connectors are disconnected.

  • Inspect for continuity between steering angle sensor terminal A (wiring harness-side) and body ground.

  • Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between start stop unit terminal 1U and steering angle sensor terminal A.

    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 ground.

  • Repair or replace the malfunctioning part.

    If there is no common connector:

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

Go to Step 6.

No

Go to the next step.

4

INSPECT STEERING ANGLE SENSOR A SIGNAL CIRCUIT FOR OPEN CIRCUIT

  • Verify that the steering angle sensor and start stop unit connectors are disconnected.

  • Inspect for continuity between start stop unit terminal 1U (wiring harness-side) and steering angle sensor terminal A (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 start stop unit terminal 1U and steering angle sensor terminal A.

    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 STEERING ANGLE SENSOR

Yes

Go to the next step.

No

Replace the steering angle sensor, then go to the next step.

(See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

(See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

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 [START STOP UNIT].)

No

DTC troubleshooting completed.

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