DTC B112A:16 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c404800

DESCRIPTION

IG2 relay circuit malfunction
DETECTION CONDITION
•  IG2 monitor input circuit voltage less than threshold (2.2—6.5 V) is detected for 1 s, while IG2 relay output circuit is active.
POSSIBLE CAUSE
•  Relay block connector or terminals malfunction
•  Relay block malfunction
•  Keyless control module connector or terminals malfunction
•  Open circuit or short to ground in IG2 monitor input circuit
―  Short to ground in wiring harness between WIPER 20 A fuse and keyless control module terminal 4X
―  WIPER 20 A fuse malfunction
―  Open circuit in wiring harness between relay block terminal 1C and keyless control module terminal 4X
•  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 there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 5.
No
Go to the next step.
2
INSPECT RELAY BLOCK
•  Inspect the relay block.
•  Is there any malfunction?
Yes
Replace the relay block, then go to Step 5.
(See RELAY BLOCK REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
3
INSPECT KEYLESS CONTROL MODULE CONNECTOR CONDITION
•  Disconnect the keyless control module connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Is there any malfunction?
Yes
Repair or replace the connector or terminals, then go to Step 5.
No
Go to the next step.
4
INSPECT IG1 MONITOR INPUT CIRCUIT FOR OPEN CIRCUIT OR SHORT TO GROUND
•  Relay block and keyless control module connectors are disconnected.
•  Reconnect the relay block connector.
•  Reconnect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at the keyless control module terminal 4X (wiring harness-side).
•  Is the voltage B+?
Yes
Go to the next step.
No
Inspect the WIPER 20 A fuse.
•  If the fuse is melt:
―  Repair or replace the wiring harness for a possible short to ground.
―  Replace the fuse.
•  If the fuse is deterioration:
―  Replace the fuse.
•  If the fuse is normal:
―  Repair or replace the wiring harness for a possible open circuit.
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Clear the DTC from the keyless control module using the M-MDS.
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
6
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
DTC troubleshooting completed.