DTC B10E7:17 [START STOP UNIT]


id0902p6020300

System malfunction location

IG1 relay circuit malfunction

Detection condition
•  The start stop unit detects IG1 monitor voltage of 2.5 V or more for 1 s or more with the ignition switched off or ACC.
Fail-safe
•  Door locking operation inhibited while under i-stop control.
Possible cause
•  IG1 relay malfunction
•  Start stop unit connector or terminal malfunction
•  Short to power supply in wiring harness between IG1 relay terminal C and start stop unit terminal 1B
•  Start stop unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1
INSPECT IG1 RELAY FOR MALFUNCTION
•  Switch the ignition to off.
•  Remove the IG1 relay.
•  Inspect the IG1 relay.
•  Is the IG1 relay normal?
Yes
Go to the next step.
No
Replace the IG1 relay, then go to Step 4.
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 4.
3
INSPECT START STOP UNIT POWER SUPPLY CIRCUIT (IG1) FOR SHORT TO POWER SUPPLY
•  Reconnect all the disconnected connectors.
•  Measure the voltage at start stop unit terminal 1B (vehicle wiring harness side).
•  Is the voltage 2.5 V or more?
Yes
Repair or replace the wiring harness which has a short to the power supply, then go to the next step.
No
Go to the next step.
4
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Reconnect all the disconnected connectors.
•  Clear DTC for the start stop unit using the M-MDS.
•  Switch the ignition to off and wait for 1 s or more.
•  Perform the DTC inspection for the start stop unit using the M-MDS.
•  Is the DTC B10E7:17 displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the start stop unit, then go to the next step.
No
Go to the next step.
5
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.