DTC B108C:24 [START STOP UNIT]

id0902p6019600

Description

Push button start switch 2 circuit malfunction

Detection condition

•  Start stop unit detects that the push button start switch 2 is kept in an off condition 5 times or more even though the push button start switch 1 is on.

Fail-safe function

Not applicable

Possible cause

•  Push button start connector or terminal malfunction

•  Open circuit in wiring harness between push button start terminal E and body ground

•  Start stop unit connector or terminal malfunction

•  Open circuit in wiring harness between start stop unit terminal 2J and push button start terminal I

•  Push button start switch 2 malfunction

•  Start stop unit malfunction

Description	Push button start switch 2 circuit malfunction
Detection condition	• Start stop unit detects that the push button start switch 2 is kept in an off condition 5 times or more even though the push button start switch 1 is on.
Fail-safe function	Not applicable
Possible cause	• Push button start connector or terminal malfunction • Open circuit in wiring harness between push button start terminal E and body ground • Start stop unit connector or terminal malfunction • Open circuit in wiring harness between start stop unit terminal 2J and push button start terminal I • Push button start switch 2 malfunction • Start stop unit malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PUSH BUTTON START CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • Disconnect the push button start 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 FOR OPEN CIRCUIT IN PUSH BUTTON START SWITCH 2 GROUND CIRCUIT • Verify that the push button start connector is disconnected. • Inspect for continuity between push button start terminal E (wiring harness-side) and body ground. • Is there continuity?	Yes	Go to the next step.
2		No	Refer to the wiring diagram and verify whether or not there is a common connector between push button start terminal E and body ground. 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.
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 FOR OPEN CIRCUIT IN PUSH BUTTON START SWITCH 2 CIRCUIT • Verify that the push button start and start stop unit connectors are disconnected. • Inspect for continuity between start stop unit terminal 2J (wiring harness-side) and push button start terminal I (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between start stop unit terminal 2J and push button start terminal I. 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 PUSH BUTTON START SWITCH 2 • Inspect the push button start switch 2. (See PUSH BUTTON START INSPECTION.) • Is the push button start switch 2 normal?	Yes	Go to the next step.
5		No	Replace the push button start, then go to the next step. (See PUSH BUTTON START REMOVAL/INSTALLATION.)
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [MZR 1.6].) • 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 press the push button start 5 times 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.
6		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].)
7		No	DTC troubleshooting completed.