DTC U3004:16 [ADVANCED KEYLESS AND START SYSTEM]

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Detection Condition

• Short to ground in keyless control module ACC input

Possible Causes

• Short to wiring harness between ignition switch and keyless control module

• MIRROR 7.5 A fuse malfunction

• Battery malfunction

• Keyless control module malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action

1

FUSE INSPECTION

•  Turn the ignition switch to the LOCK position.

•  Disconnect the negative battery cable.

•  Remove the MIRROR 7.5 A fuse.

•  Is the fuse normal?

Yes

Go to the next step.

No

Replace the fuse.

2

BATTERY INSPECTION

•  Measure the battery positive voltage.

•  Is the voltage between 9—16 V?

Yes

Go to the next step.

No

Higher than specification

•  Replace or inspection the battery.
(See BATTERY INSPECTION [ZJ, ZY].)

(See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].)

•  Go to Step 4.

Lower than specification

•  Replace or charge the battery.
(See BATTERY RECHARGING [ZJ, ZY].)

(See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].)

•  Go to Step 4.

3

INSPECT WIRING HARNESS BETWEEN IGNITION SWITCH AND KEYLESS CONTROL MODULE

•  Disconnect the keyless control module connector and ignition switch connector.

•  Inspect the wiring harnesses between the ignition switch connector terminal B and keyless control module connector terminal 2A for the following:

―  Short to ground

―  Short to power supply

•  Is the wiring harness normal?

Yes

Go to the next step.

No

Repair or replace the wiring harness between the ignition switch and keyless control module.

4

MEASURE KEYLESS CONTROL MODULE INPUT VOLTAGE

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.

•  Turn the ignition switch to the ACC position.

•  Measure the voltage of keyless control module connector terminal 2A.
(See KEYLESS CONTROL MODULE INSPECTION [ADVANCED KEYLESS AND START SYSTEM].)

•  Is the voltage normal?

Yes

Go to the next step.

No

Replace the keyless control module.

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

5

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 U3004:16 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	FUSE INSPECTION • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable. • Remove the MIRROR 7.5 A fuse. • Is the fuse normal?	Yes	Go to the next step.
1		No	Replace the fuse.
2	BATTERY INSPECTION • Measure the battery positive voltage. • Is the voltage between 9—16 V?	Yes	Go to the next step.
2		No	Higher than specification • Replace or inspection the battery. (See BATTERY INSPECTION [ZJ, ZY].) (See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].) • Go to Step 4. Lower than specification • Replace or charge the battery. (See BATTERY RECHARGING [ZJ, ZY].) (See BATTERY REMOVAL/INSTALLATION [ZJ, ZY].) • Go to Step 4.
3	INSPECT WIRING HARNESS BETWEEN IGNITION SWITCH AND KEYLESS CONTROL MODULE • Disconnect the keyless control module connector and ignition switch connector. • Inspect the wiring harnesses between the ignition switch connector terminal B and keyless control module connector terminal 2A for the following: ― Short to ground ― Short to power supply • Is the wiring harness normal?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness between the ignition switch and keyless control module.
4	MEASURE KEYLESS CONTROL MODULE INPUT VOLTAGE • Reconnect the disconnected connectors. • Connect the negative battery cable. • Turn the ignition switch to the ACC position. • Measure the voltage of keyless control module connector terminal 2A. (See KEYLESS CONTROL MODULE INSPECTION [ADVANCED KEYLESS AND START SYSTEM].) • Is the voltage normal?	Yes	Go to the next step.
4		No	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
5	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 U3004:16 displayed?	Yes	Replace the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION [ADVANCED KEYLESS AND START SYSTEM].)
5		No	DTC troubleshooting completed.