DTC B1026:87 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM]

id09021c387100

DESCRIPTION

Communication error between keyless control module and steering lock unit
DETECTION CONDITION
•  No response from the steering lock unit.
•  Keyless control module receives the signal of communication error from the steering lock unit.
•  Keyless control module receives unexpected message from the steering lock unit.
POSSIBLE CAUSE
•  Steering lock unit connector or terminals malfunction
•  Keyless control module connector or terminals malfunction
•  Open circuit in wiring harness between the following terminals:
―  Steering lock unit terminal G—Keyless control module terminal 2I
•  Steering lock unit malfunction
•  Keyless control module malfunction

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY RELATED STORED DTC
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the DTC B1026:08, B1026:51, B1026:71 or B1026:96 also present?
Yes
Go to the applicable DTC inspection.
(See DTC B1026:08 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
(See DTC B1026:51 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
(See DTC B1026:71 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
(See DTC B1026:96 [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
No
Go to the next step.
2
INSPECT STEERING LOCK UNIT CONNECTOR AND TERMINALS
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  Disconnect the steering lock unit 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 6.
No
Go to the next step.
3
INSPECT KEYLESS CONTROL MODULE CONNECTOR AND TERMINALS
•  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 6.
No
Go to the next step.
4
INSPECT STEERING LOCK UNIT COMMUNICATION CIRCUIT FOR OPEN CIRCUIT
•  Steering lock unit and keyless control module connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
―  Steering lock unit terminal G—Keyless control module terminal 2I
•  Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for a possible open circuit, then go to Step 6.
5
INSPECT STEERING LOCK UNIT
•  Reconnect the steering lock unit connector.
•  Reconnect the negative battery cable.
•  Inspect the steering lock unit.
•  Is there any malfunction?
Yes
Replace the steering lock unit and perform the steering lock unit programming, then go to the next step.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [WITH ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM].)
(See STEERING LOCK UNIT ID CODE REGISTRATION.)
No
Go to the next step.
6
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect the disconnected connectors.
•  Reconnect the negative battery cable.
•  Switch the ignition to off, then open the door to lock the steering.
•  Clear the DTC from the keyless control module using the M-MDS.
•  Switch the ignition to off, then open the door to lock the steering.
•  Perform the advanced keyless entry and push button start system DTC inspection using the M-MDS.
•  Is the same DTC present?
Yes
Replace the keyless control module, then go to the next step.
(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
7
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.