DTC B10A5:12 [ADVANCED KEYLESS AND START SYSTEM]

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Detection Condition

• Keyless beeper output voltage malfunction

Possible Causes

• Keyless beeper connector or terminals malfunction

• Open circuit in wiring harness between keyless beeper and body ground

• Keyless control module connector or terminals malfunction

• Open or short circuit in wiring harness between keyless beeper and keyless control module

• Keyless beeper malfunction

• Keyless control module malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

INSPECT KEYLESS BEEPER CONNECTOR

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Disconnect the keyless beeper connector.

•  Inspect the keyless beeper connector. (Corrosion, damage, and disconnected pins)

•  Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the keyless beeper connector or terminal, then go to Step 6.

2

INSPECT WIRING HARNESS BETWEEN KEYLESS BEEPER AND GROUND

•  Keyless beeper connector is disconnected.

•  Inspect for continuity between keyless beeper terminal B (wiring harness-side) and body ground.

•  Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness between keyless beeper and body ground, then go to Step 6.

3

INSPECT KEYLESS CONTROL MODULE CONNECTOR

•  Disconnect the keyless control module connector.

•  Inspect the keyless control module connector. (Corrosion, damage, and disconnected pins)

•  Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the keyless control module connector or terminal, then go to Step 6.

4

INSPECT WIRING HARNESS BETWEEN KEYLESS BEEPER AND KEYLESS CONTROL MODULE

•  Inspect the wiring harness between keyless beeper terminal A and keyless control module terminal 3K for the following:

―  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 keyless beeper and keyless control module, then go to Step 6.

5

INSPECT KEYLESS BEEPER

•  Inspect the keyless beeper.
(See KEYLESS BEEPER INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is the keyless beeper normal?

Yes

Go to the next step.

No

Replace the keyless beeper, then go to the next step.

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

6

VERIFY DTCs

•  Reconnect all disconnected connectors.

•  Reconnect the negative battery cable.

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

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

•  Is the DTC B10A5:12 displayed?

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	INSPECT KEYLESS BEEPER CONNECTOR • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Disconnect the keyless beeper connector. • Inspect the keyless beeper connector. (Corrosion, damage, and disconnected pins) • Are the connector and terminals normal?	Yes	Go to the next step.
1		No	Repair/replace the keyless beeper connector or terminal, then go to Step 6.
2	INSPECT WIRING HARNESS BETWEEN KEYLESS BEEPER AND GROUND • Keyless beeper connector is disconnected. • Inspect for continuity between keyless beeper terminal B (wiring harness-side) and body ground. • Is there continuity?	Yes	Go to the next step.
2		No	Repair or replace the wiring harness between keyless beeper and body ground, then go to Step 6.
3	INSPECT KEYLESS CONTROL MODULE CONNECTOR • Disconnect the keyless control module connector. • Inspect the keyless control module connector. (Corrosion, damage, and disconnected pins) • Are the connector and terminals normal?	Yes	Go to the next step.
3		No	Repair/replace the keyless control module connector or terminal, then go to Step 6.
4	INSPECT WIRING HARNESS BETWEEN KEYLESS BEEPER AND KEYLESS CONTROL MODULE • Inspect the wiring harness between keyless beeper terminal A and keyless control module terminal 3K for the following: ― Short to power supply ― Open circuit • Is the wiring harness normal?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness between keyless beeper and keyless control module, then go to Step 6.
5	INSPECT KEYLESS BEEPER • Inspect the keyless beeper. (See KEYLESS BEEPER INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is the keyless beeper normal?	Yes	Go to the next step.
5		No	Replace the keyless beeper, then go to the next step. (See KEYLESS BEEPER REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
6	VERIFY DTCs • Reconnect all disconnected connectors. • Reconnect the negative battery cable. • Clear the DTCs using the M-MDS. (See CLEARING DTC [ADVANCED KEYLESS AND START SYSTEM].) • Verify the DTCs using the M-MDS. (See DTC INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is the DTC B10A5:12 displayed?	Yes	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
6		No	DTC troubleshooting completed.