DTC B108C:23 [START STOP UNIT]

id0902p6019500

Description

Push button start switch 2 circuit malfunction
Detection condition
•  Start stop unit detects the push button start switch 2 is stuck on for 120 s or more.
Fail-safe function
•  Perform the control with the push button start switch 2 turned off.
Possible cause
•  Push button start connector or terminal malfunction
•  Start stop unit connector or terminal malfunction
•  Short to ground 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.
•  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.
No
Repair or replace the connector, then go to Step 5.
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 5.
3
INSPECT FOR SHORT TO GROUND IN PUSH BUTTON START SWITCH 2 CIRCUIT
•  Verify that the push button start and start stop unit connectors are disconnected.
•  Inspect for continuity between push button start terminal I (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 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 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 5.
No
Go to the next step.
4
INSPECT PUSH BUTTON START SWITCH 2
•  Inspect push button start switch 2.
•  Is push button start switch 2 normal?
Yes
Go to the next step.
No
Replace the push button start, then go to the next step.
(See PUSH BUTTON START REMOVAL/INSTALLATION.)
5
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC for the start stop unit using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 120 s or more.
•  Retrieve the start stop unit DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the start stop unit.
Go to the next step.
No
Go to the next step.
6
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.