DTC C0052:14 [START STOP UNIT]

id0902p6021400

System malfunction location

Steering angle sensor A signal circuit malfunction

Detection condition

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

Fail-safe

—

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

System malfunction location	Steering angle sensor A signal circuit malfunction
Detection condition	• The start stop unit detects an open circuit in the steering angle sensor A signal circuit or a short to ground.
Fail-safe	—
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 to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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.
1		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.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT STEERING ANGLE SENSOR 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 (vehicle wiring harness side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness which is shorted to ground, then go to Step 6.
3		No	Go to the next step.
4	INSPECT STEERING ANGLE SENSOR CIRCUIT FOR OPEN CIRCUIT • Verify that the steering angle sensor and start stop unit connectors are disconnected. • Inspect the wiring harness for an open circuit between start stop unit terminal 1U (vehicle wiring harness side) and steering angle sensor terminal A (vehicle wiring harness side). • Is there continuity?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness which has an open circuit, then go to Step 6.
5	INSPECT STEERING ANGLE SENSOR • Inspect the steering angle sensor. (See STEERING ANGLE SENSOR INSPECTION.) • Is the steering angle sensor normal?	Yes	Go to the next step.
5		No	Replace the steering angle sensor, then go to the next step. (See CLOCK SPRING REMOVAL/INSTALLATION.)
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear DTC for the start stop unit using the M-MDS. (See CLEARING DTC [START STOP UNIT].) • Perform the DTC inspection for the start stop unit using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) • Is DTC C0052:14 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the start stop unit, then go to the next step. (See START STOP UNIT REMOVAL/INSTALLATION.)
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [START STOP UNIT].)
7		No	DTC troubleshooting completed.