DTC B1026:51 [ADVANCED KEYLESS AND START SYSTEM]

id0902e1387000

Detection Condition

• Steering lock unit not programmed

Possible Causes

• Programmed not performed after steering lock unit replacement

• Open or short circuit in the wiring harness between steering lock unit and keyless control module

• Steering lock unit malfunction

• Keyless control module malfunction

System wiring diagram

am2zzw00001631

Diagnostic Procedure

Step

Inspection

Action

1

PERFORM STEERING LOCK UNIT PROGRAMMING

•  Perform the steering lock unit programming.
(See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS AND START SYSTEM].)

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].)

•  Verify DTCs using the M-MDS.
(See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is DTC B1026:51 displayed?

Yes

Go to the next step.

No

DTC troubleshooting completed.

2

INSPECT WIRING HARNESS BETWEEN STEERING LOCK UNIT AND KEYLESS CONTROL MODULE

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the keyless control module and steering lock unit connectors.

•  Inspect the wiring harness between keyless control module connector terminal 2L and steering lock unit connector terminal G for the following:

―  Short to body ground

―  Short to power supply

―  Open circuit

•  Is the wiring harness normal?

Yes

Go to the next step.

No

Repair or replace the wiring harness between the steering lock unit and keyless control module, then go to the next step.

3

VERIFY DTCs

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].)

•  Verify DTCs using the M-MDS.
(See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is DTC B1026:51 displayed?

Yes

•  Replace the steering lock unit and perform steering lock unit programming.
(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].)

(See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [R.H.D.].)

(See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS AND START SYSTEM].)

•  Go to the next step.

No

DTC troubleshooting completed.

4

Verify DTCs

•  Clear DTCs using the M-MDS.
(See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].)

•  Verify DTCs using the M-MDS.
(See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is DTC B1026:51 displayed again?

Yes

Replace the keyless control module.

(See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)

No

DTC troubleshooting completed.

Step	Inspection		Action
1	PERFORM STEERING LOCK UNIT PROGRAMMING • Perform the steering lock unit programming. (See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS AND START SYSTEM].) • Clear DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) • Verify DTCs using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is DTC B1026:51 displayed?	Yes	Go to the next step.
1		No	DTC troubleshooting completed.
2	INSPECT WIRING HARNESS BETWEEN STEERING LOCK UNIT AND KEYLESS CONTROL MODULE • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the keyless control module and steering lock unit connectors. • Inspect the wiring harness between keyless control module connector terminal 2L and steering lock unit connector terminal G for the following: ― Short to body ground ― Short to power supply ― Open circuit • Is the wiring harness normal?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness between the steering lock unit and keyless control module, then go to the next step.
3	VERIFY DTCs • Reconnect the disconnected connectors. • Connect the negative battery cable. • Clear DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) • Verify DTCs using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is DTC B1026:51 displayed?	Yes	• Replace the steering lock unit and perform steering lock unit programming. (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [L.H.D.].) (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION [R.H.D.].) (See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS AND START SYSTEM].) • Go to the next step.
3		No	DTC troubleshooting completed.
4	Verify DTCs • Clear DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) • Verify DTCs using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is DTC B1026:51 displayed again?	Yes	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
4		No	DTC troubleshooting completed.