DTC U3003:16, U3003:17 [MANUAL AIR CONDITIONER]

id0702c2731000

System malfunction location

•  U3003:16: Climate control unit power supply circuit voltage below threshold (9.98 V or less)

•  U3003:17: Climate control unit power supply circuit voltage above threshold (16.21 V or more)

Detection condition

•  Climate control unit power supply voltage is other than 9.99—16.20 V

Fail-safe

Not applicable

Possible cause

•  Generator system malfunction

•  ROOM 15 A fuse malfunction

•  Battery malfunction

•  Climate control unit connector malfunction

•  Open or short circuit to ground in wiring harness between battery positive terminal and climate control unit

•  Climate control unit malfunction

System malfunction location	• U3003:16: Climate control unit power supply circuit voltage below threshold (9.98 V or less) • U3003:17: Climate control unit power supply circuit voltage above threshold (16.21 V or more)
Detection condition	• Climate control unit power supply voltage is other than 9.99—16.20 V
Fail-safe	Not applicable
Possible cause	• Generator system malfunction • ROOM 15 A fuse malfunction • Battery malfunction • Climate control unit connector malfunction • Open or short circuit to ground in wiring harness between battery positive terminal and climate control unit • Climate control unit malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT PCM DTC (INSPECT GENERATOR CIRCUIT)

•  Switch the ignition off.

•  Connect the M-MDS to the DLC-2.

•  Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See DTC TABLE [SKYACTIV-D 2.2].)

No

Go to the next step.

2

INSPECT FUSE

•  Switch the ignition off.

•  Disconnect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  Remove the ROOM 15 A fuse.

•  Is the fuse normal?

Yes

Install the ROOM 15 A fuse, then go to the next step.

No

Replace the ROOM 15 A fuse, then go to the next step.

3

INSPECT BATTERY

•  Inspect the battery.
(See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)

(See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

(See BATTERY INSPECTION [SKYACTIV-D 2.2].)

•  Is the battery normal?

Yes

Go to the next step.

No

Replace/charge the battery, then go to the next step.

4

VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION

•  Disconnect the climate control unit connector.

•  Inspect the connector and terminals (corrosion, damage, pin disconnection).

•  Are the connector and terminals normal?

Yes

Go to the next step.

No

Repair/replace the connector or terminal.

After repair procedure, go to the next step.

5

INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR SHORT TO GROUND

•  Disconnect the climate control unit connector.

•  Inspect for continuity between climate control unit terminal B and body ground.

•  Is there continuity?

Yes

If there is a common connector:If there is no common connector:

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal B and battery positive terminal.

•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

•  Repair or replace the malfunctioning part.

•  Repair or replace the wiring harness which has a short to ground.

Go to Step 7.

No

Go to the next step.

6

INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

•  Inspect for continuity between climate control unit terminal B and battery positive terminal.

•  Is there continuity?

Yes

Go to the next step.

No

If there is a common connector:If there is no common connector:

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal B and battery positive terminal.

•  Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

•  Repair or replace the malfunctioning part.

•  Repair or replace the wiring harness which has an open circuit.

Go to the next step.

7

INSPECT CLIMATE CONTROL UNIT

•  Reconnect the disconnected connectors.

•  Connect the negative battery cable.
(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  Clear DTCs using the M-MDS.

•  Perform the climate control unit DTC inspection using the M-MDS.
(See DTC DISPLAY [MANUAL AIR CONDITIONER].)

•  Are DTCs U3003:16 or U3003:17 displayed?

Yes

Repeat the inspection from Step 1.

•  If the malfunction does not recur, go to the next step.

•  If the malfunction recurs, replace the climate control unit.
(See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

8

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Verify other DTCs displayed.

•  Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	INSPECT PCM DTC (INSPECT GENERATOR CIRCUIT) • Switch the ignition off. • Connect the M-MDS to the DLC-2. • Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 2.2].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC TABLE [SKYACTIV-D 2.2].)
1		No	Go to the next step.
2	INSPECT FUSE • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Remove the ROOM 15 A fuse. • Is the fuse normal?	Yes	Install the ROOM 15 A fuse, then go to the next step.
2		No	Replace the ROOM 15 A fuse, then go to the next step.
3	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See BATTERY INSPECTION [SKYACTIV-D 2.2].) • Is the battery normal?	Yes	Go to the next step.
3		No	Replace/charge the battery, then go to the next step.
4	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION • Disconnect the climate control unit connector. • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
4		No	Repair/replace the connector or terminal. After repair procedure, go to the next step.
5	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Disconnect the climate control unit connector. • Inspect for continuity between climate control unit terminal B and body ground. • Is there continuity?	Yes	If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal B and battery positive terminal. • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. • Repair or replace the wiring harness which has a short to ground. Go to Step 7.
5		No	Go to the next step.
6	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Inspect for continuity between climate control unit terminal B and battery positive terminal. • Is there continuity?	Yes	Go to the next step.
6		No	If there is a common connector:If there is no common connector: Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal B and battery positive terminal. • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. • Repair or replace the wiring harness which has an open circuit. Go to the next step.
7	INSPECT CLIMATE CONTROL UNIT • Reconnect the disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)(See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear DTCs using the M-MDS. • Perform the climate control unit DTC inspection using the M-MDS. (See DTC DISPLAY [MANUAL AIR CONDITIONER].) • Are DTCs U3003:16 or U3003:17 displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction does not recur, go to the next step. • If the malfunction recurs, replace the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].) Go to the next step.
7		No	Go to the next step.
8	VERIFY THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs output?	Yes	Perform the corresponding DTC inspection.
8		No	DTC troubleshooting completed.