DTC C2003:13 [START STOP UNIT]

id0902p6021800

System malfunction location

Open circuit in steering switch

Detection condition

•  The start stop unit detects an open circuit in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).

Fail-safe

—

Possible cause

•  Clock spring connector or terminal malfunction

•  Clock spring malfunction

•  Start stop unit connector or terminal malfunction

•  Open circuit in wiring harness between the following terminals:

―  Start stop unit terminal 1AA and clock spring (start stop unit side) terminal K

―  Start stop unit terminal 1AB and clock spring (start stop unit side) terminal C

•  Steering switch malfunction

•  Start stop unit malfunction

System malfunction location	Open circuit in steering switch
Detection condition	• The start stop unit detects an open circuit in the steering switch circuit for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	—
Possible cause	• Clock spring connector or terminal malfunction • Clock spring malfunction • Start stop unit connector or terminal malfunction • Open circuit in wiring harness between the following terminals: ― Start stop unit terminal 1AA and clock spring (start stop unit side) terminal K ― Start stop unit terminal 1AB and clock spring (start stop unit side) terminal C • Steering switch malfunction • Start stop unit malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT CLOCK SPRING 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 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.
1		No	Repair or replace the connector, then go to Step 6.
2	INSPECT CLOCK SPRING • Inspect the clock spring. (See CLOCK SPRING INSPECTION.) • Is the clock spring normal?	Yes	Go to the next step.
2		No	Replace the clock spring, then go to Step 6. (See CLOCK SPRING REMOVAL/INSTALLATION.)
3	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.
3		No	Repair or replace the connector, then go to Step 6.
4	INSPECT STEERING SWITCH CIRCUIT FOR OPEN CIRCUIT • Verify that the clock spring and start stop unit connectors are disconnected. • Inspect the wiring harness between the following terminals (vehicle wiring harness side) for continuity. ― Start stop unit terminal 1AA and clock spring (start stop unit side) terminal K ― Start stop unit terminal 1AB and clock spring (start stop unit side) terminal C • 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 SWITCH • Inspect the steering switch. (See STEERING SWITCH INSPECTION.) • Is the steering switch normal?	Yes	Go to the next step.
5		No	Replace the steering switch, then go to the next step. (See STEERING SWITCH 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].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • Perform the DTC inspection for the start stop unit using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) • Is DTC C2003:13 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.