DTC B11C4:23 [ADVANCED KEYLESS ENTRY SYSTEM]


id0902p8026600

Description

Request switch (liftgate) circuit malfunction

Detection condition
•  Start stop unit detected any of the following conditions at a vehicle speed of 5 km/h {3 mph} or more.
―  The request switch (liftgate) is continuously ON for 2 min or more.
―  The request switch (liftgate) was ON 7 times.
Fail-safe function
Not applicable
Possible cause
•  Request switch (liftgate) connector or terminal malfunction
•  LF control unit connector or terminal malfunction
•  Short to ground in wiring harness between LF control unit terminal E and request switch (liftgate) terminal A
•  Request switch (liftgate) malfunction
•  LF control unit malfunction
•  Start stop unit malfunction

Diagnostic Procedure

Step

Inspection

Action

1
INSPECT REQUEST SWITCH (LIFTGATE) CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the request switch (liftgate) 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 6.
2
INSPECT LF CONTROL UNIT CONNECTOR CONDITION
•  Disconnect the LF control 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 6.
3
INSPECT FOR SHORT TO GROUND IN REQUEST SWITCH (LIFTGATE) CIRCUIT
•  Verify that the LF control unit and request switch (liftgate) connectors are disconnected.
•  Inspect for continuity between request switch (liftgate) terminal A (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 LF control unit terminal E and request switch (liftgate) terminal A.
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 6.
No
Go to the next step.
4
INSPECT REQUEST SWITCH (LIFTGATE)
•  Inspect the request switch (liftgate).
•  Is the request switch (liftgate) normal?
Yes
Go to the next step.
No
Replace the request switch (liftgate), then go to Step 6.
5
INSPECT LF CONTROL UNIT
•  Inspect the LF control unit.
•  Is the LF control unit normal?
Yes
Go to the next step.
No
Replace the LF control unit, then go to the next step.
6
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC for the advanced keyless entry system using the M-MDS.
•  Drive the vehicle at 5 km/h {3 mph} or more for 2 min or more.
•  Retrieve the advanced keyless entry system 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.
7
VERIFY IF OTHER DTCs DISPLAYED
•  Are any other DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.