DTC B112A:11 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]


id09021c404600

DETECTION CONDITION
Voltage lower than the specification (2.2—6.5 V) is detected for 0.1 s with the IG2 relay output circuit operating
POSSIBLE CAUSE
•  Connector or terminal malfunction
•  Short circuit to ground in wiring harness between relay block connector terminal 2A and keyless control module connector terminal 4H
•  Relay block malfunction
•  Keyless control module malfunction

Diagnostic Procedure

Step

Inspection

Action

1
INSPECT RELAY BLOCK CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the relay block connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is the connector normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.After repair procedure, go to Step 5.
2
INSPECT RELAY BLOCK
•  Is the relay block normal?
Yes
Go to the next step.
No
Replace the relay block.
After replacement, go to Step 5.
3
INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the keyless control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is the connector normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
After repair procedure, go to Step 5.
4
INSPECT IG2 RELAY OUTPUT CIRCUIT FOR SHORT CIRCUIT TO GROUND
•  Inspect for continuity between relay block connector terminal 2A and body ground.
•  Is there continuity?
Yes
Repair/replace the wiring harness.
After repair procedure, go to the next step.
No
Go to the next step.
5
VERIFY DTC
•  Reconnect the disconnected connectors and the negative battery cable.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the keyless control module.
Go to the next step.
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are there other DTCs output?
Yes
Perform the corresponding DTC inspection.
No
DTC troubleshooting completed.