DTC B2170 [ADVANCED KEYLESS SYSTEM]

id0902e2802500

DTC B2170

Push switch.
DETECTION CONDITION
•  Push switch OFF is detected even though ignition is switched ON
•  Push switch condition changed even though ignition is switched ON
POSSIBLE CAUSE
•  Ignition switch connector or terminal malfunction
•  Open circuit or short to ground in wiring harness between battery positive terminal and ignition switch terminal E
―  Short to ground in the wiring harness between ROOM 15 A fuse and ignition switch terminal E
―  ROOM 15 A fuse malfunction
―  Open circuit in wiring harness between battery positive terminal and ignition switch terminal E
•  Push switch malfunction
•  Keyless control module connector or terminal malfunction
•  Open circuit or short to ground in wiring harness between ignition switch terminal C and keyless control module terminal 3E
•  Keyless control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
IGNITION SWITCH CONNECTOR INSPECTION
•  Switch the ignition OFF (LOCK).
•  Disconnect the negative battery cable.
•  Disconnect the ignition switch connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 6.
No
Go to the next step.
2
INSPECT FOR OPEN CIRCUIT, SHORT TO GROUND IN WIRING HARNESS BETWEEN BATTERY POSITIVE TERMINAL AND PUSH SWITCH
•  Verify that the ignition switch connector is disconnected.
•  Reconnect the negative battery cable.
•  Measure the voltage at ignition switch terminal E (vehicle wiring harness side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the ROOM 15 A fuse.
•  If a fuse is burnt out:
―  Repair or replace the wiring harness which is shorted to ground.
―  Replace the fuse.
•  If a fuse is damaged:
―  Replace the fuse.
•  If the fuse is normal:
―  Repair or replace the wiring harness which has an open circuit.
Go to Step 6.
3
INSPECT PUSH SWITCH
•  Inspect the push switch.
•  Is there any malfunctioning part?
Yes
Replace the ignition switch, then go to Step 6.
(See IGNITION SWITCH REMOVAL/INSTALLATION.)
No
Go to the next step.
4
INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the negative battery cable.
•  Disconnect the keyless control module connector.
•  Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection.
•  Is there any malfunctioning part?
Yes
Repair or replace the connector, then go to Step 6.
No
Go to the next step.
5
INSPECT FOR OPEN CIRCUIT, SHORT TO GROUND BETWEEN PUSH SWITCH AND KEYLESS CONTROL MODULE
•  Reconnect all the disconnected connectors.
•  Reconnect the negative battery cable.
•  Switch the ignition ON.
•  Measure the voltage at keyless control module terminal 3E (vehicle wiring harness).
•  Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness which has an open circuit or short to ground, then go to the next step.
6
VERIFY THAT THE REPAIRS HAVE BEEN COMPLETED.
•  Reconnect all the disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC using the M-MDS.
•  Perform the DTC inspection for the advanced keyless entry and start system using the M-MDS.
•  Is the same DTC displayed?
Yes
Return to Step 1 and inspect for other possible causes.If the malfunction recurs, replace the keyless control module, then go to the next step.
No
Go to the next step.
7
Verify if other DTCs are displayed.
•  Are any other DTCs displayed?
Yes
Repair the malfunctioning part according to the applicable DTC troubleshooting.
No
DTC troubleshooting completed.