DTC U3003:16, U3003:17, U3006:16, U3006:17 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

id0702k2902500

System malfunction location

•  U3003:16: Front climate control unit power supply circuit voltage below threshold (10 V or less)

•  U3003:17: Front climate control unit power supply circuit voltage above threshold (17.3 V or more)

•  U3006:16: Rear climate control unit power supply circuit voltage below threshold (10 V or less)

•  U3006:17: Rear climate control unit power supply circuit voltage above threshold (17.3 V or more)

Detection condition

•  Front climate control unit power supply voltage is other than 10.1—17.2 V

•  Rear climate control unit power supply voltage is other than 10.1—17.2 V

Fail-safe function

Not applicable

Possible cause

•  DTCs stored in PCM.

―  DC-DC converter connector or terminal malfunction

―  DC-DC converter malfunction

•  Battery malfunction

•  Generator system malfunction

•  Front climate control unit connector or terminal malfunction

•  Rear climate control unit connector or terminal malfunction

•  MAIN 200 A fuse malfunction

•  ROOM 15 A fuse malfunction

•  METER2 7.5 A fuse malfunction

•  Ignition relay (IG1_STAB) malfunction

•  Short to ground in wiring harness between front climate control unit terminal 1U — ROOM 15 A fuse

•  Short to ground in wiring harness between rear climate control unit terminal V — ROOM 15 A fuse

•  Open circuit in wiring harness between front climate control unit terminal 1U — positive battery terminal

•  Open circuit in wiring harness between rear climate control unit terminal V — positive battery terminal

•  Open circuit in wiring harness between front climate control unit terminal 1W — DC-DC converter terminal K

•  Open circuit in wiring harness between rear climate control unit terminal X — DC-DC converter terminal K

•  Short to ground in wiring harness between front climate control unit terminal 1W — MAIN 200 A fuse

•  Short to ground in wiring harness between rear climate control unit terminal X — MAIN 200 A fuse

•  Front climate control unit malfunction

•  Rear climate control unit malfunction

System malfunction location	• U3003:16: Front climate control unit power supply circuit voltage below threshold (10 V or less) • U3003:17: Front climate control unit power supply circuit voltage above threshold (17.3 V or more) • U3006:16: Rear climate control unit power supply circuit voltage below threshold (10 V or less) • U3006:17: Rear climate control unit power supply circuit voltage above threshold (17.3 V or more)
Detection condition	• Front climate control unit power supply voltage is other than 10.1—17.2 V • Rear climate control unit power supply voltage is other than 10.1—17.2 V
Fail-safe function	Not applicable
Possible cause	• DTCs stored in PCM. ― DC-DC converter connector or terminal malfunction ― DC-DC converter malfunction • Battery malfunction • Generator system malfunction • Front climate control unit connector or terminal malfunction • Rear climate control unit connector or terminal malfunction • MAIN 200 A fuse malfunction • ROOM 15 A fuse malfunction • METER2 7.5 A fuse malfunction • Ignition relay (IG1_STAB) malfunction • Short to ground in wiring harness between front climate control unit terminal 1U — ROOM 15 A fuse • Short to ground in wiring harness between rear climate control unit terminal V — ROOM 15 A fuse • Open circuit in wiring harness between front climate control unit terminal 1U — positive battery terminal • Open circuit in wiring harness between rear climate control unit terminal V — positive battery terminal • Open circuit in wiring harness between front climate control unit terminal 1W — DC-DC converter terminal K • Open circuit in wiring harness between rear climate control unit terminal X — DC-DC converter terminal K • Short to ground in wiring harness between front climate control unit terminal 1W — MAIN 200 A fuse • Short to ground in wiring harness between rear climate control unit terminal X — MAIN 200 A fuse • Front climate control unit malfunction • Rear climate control unit malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT IGNITION RELAY (IG1_STAB) FOR MALFUNCTION

•  Switch the ignition off.

•  Disconnect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

•  Remove the ignition relay (IG1_STAB).
(See RELAY LOCATION.)

•  Inspect the ignition relay (IG1_STAB).
(See RELAY INSPECTION.)

•  Is the ignition relay (IG1_STAB) normal?

Yes

Go to the next step.

No

Replace the ignition relay (IG1_STAB), then go to Step 8.

(See RELAY LOCATION.)

2

PERFORM PCM DTC INSPECTION

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

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].)

•  Are any DTCs present?

Yes

Go to the applicable DTC inspection.

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

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

No

Go to the next step.

3

INSPECT BATTERY

•  Inspect the battery.
(See BATTERY INSPECTION.)

•  Is the battery normal?

Yes

Go to the next step.

No

Replace or charge the battery.

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

(See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

(See BATTERY RECHARGING.)

Then go to Step 8.

4

INSPECT GENERATOR

•  Inspect the generator.
(See GENERATOR INSPECTION [SKYACTIV-G 2.5].)

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

•  Is the generator normal?

Yes

Go to the next step.

No

Replace or charge the generator.

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

(See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)

Then go to Step 8.

5

VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION

•  Disconnect the climate control unit connector.
(See FRONT FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)

(See REAR CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)

•  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 Step 8.

6

INSPECT CLIMATE CONTROL UNIT POWER SUPPLY VOLTAGE

•  Climate control unit connector is disconnected.

•  Connect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

•  Switch the ignition ON (engine off or on).

•  Measure the voltage at the following terminals (wiring harness-side):

―  Front climate control unit terminal 1U

―  Rear climate control unit terminal V

•  Is the voltage 10.1—17.2 V?

Yes

Go to the next step.

No

Inspect the ROOM 15 A fuse and MAIN 200 A fuse.

•  If the fuse is blown:

―  Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and MAIN 200 A fuse.

If there is a common connector:

•  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.

If there is no common connector:

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

―  Replace the fuse.

•  If the fuse is damaged:

―  Replace the fuse.

•  If the fuse is normal:

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

If there is a common connector:

•  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.

If there is no common connector:

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

Then go to Step 8.

7

INSPECT CLIMATE CONTROL UNIT POWER SUPPLY VOLTAGE

•  Climate control unit connector is disconnected.

•  Measure the voltage at the following terminals (wiring harness-side):

―  Front climate control unit terminal 1W

―  Rear climate control unit terminal X

•  Is the voltage 10.1—17.2 V?

Yes

Go to the next step.

No

Inspect the METER2 7.5 A fuse.

•  If the fuse is blown:

―  Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and METER2 7.5 A fuse.

If there is a common connector:

•  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.

If there is no common connector:

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

―  Replace the fuse.

•  If the fuse is damaged:

―  Replace the fuse.

•  If the fuse is normal:

―  Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and DC-DC converter terminal K.

If there is a common connector:

•  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.

If there is no common connector:

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

Then go to the next step.

8

VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN

•  Switch the ignition off.

•  Disconnect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

•  Reconnect the disconnected connectors.

•  Connect the negative battery terminal.
(See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

•  Clear the DTC from the climate control unit memory using the M-MDS.
(See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

•  Perform the DTC inspection for the climate control unit using the M-MDS.
(See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

•  Is the same DTC displayed?

Yes

Repeat the inspection from Step 1.

•  If the malfunction recurs, replace the climate control unit.
(See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.)

Go to the next step.

No

Go to the next step.

9

VERIFY THAT NO OTHER DTCs ARE PRESENT

•  Verify other DTCs displayed.

•  Are any other DTCs displayed?

Yes

Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.

(See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)

No

DTC troubleshooting completed.

STEP	INSPECTION		ACTION
1	INSPECT IGNITION RELAY (IG1_STAB) FOR MALFUNCTION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Remove the ignition relay (IG1_STAB). (See RELAY LOCATION.) • Inspect the ignition relay (IG1_STAB). (See RELAY INSPECTION.) • Is the ignition relay (IG1_STAB) normal?	Yes	Go to the next step.
1		No	Replace the ignition relay (IG1_STAB), then go to Step 8. (See RELAY LOCATION.)
2	PERFORM PCM DTC INSPECTION • Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5)].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5)].) (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
2		No	Go to the next step.
3	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • Is the battery normal?	Yes	Go to the next step.
3		No	Replace or charge the battery. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See BATTERY RECHARGING.) Then go to Step 8.
4	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 2.5].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2].) • Is the generator normal?	Yes	Go to the next step.
4		No	Replace or charge the generator. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Then go to Step 8.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION • Disconnect the climate control unit connector. (See FRONT FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.) (See REAR CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.) • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
5		No	Repair/replace the connector or terminal. After repair procedure, go to Step 8.
6	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY VOLTAGE • Climate control unit connector is disconnected. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ― Front climate control unit terminal 1U ― Rear climate control unit terminal V • Is the voltage 10.1—17.2 V?	Yes	Go to the next step.
6		No	Inspect the ROOM 15 A fuse and MAIN 200 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and MAIN 200 A fuse. If there is a common connector: • 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. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. ― Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and positive battery terminal. If there is a common connector: • 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. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Then go to Step 8.
7	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY VOLTAGE • Climate control unit connector is disconnected. • Measure the voltage at the following terminals (wiring harness-side): ― Front climate control unit terminal 1W ― Rear climate control unit terminal X • Is the voltage 10.1—17.2 V?	Yes	Go to the next step.
7		No	Inspect the METER2 7.5 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and METER2 7.5 A fuse. If there is a common connector: • 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. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. ― Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and DC-DC converter terminal K. If there is a common connector: • 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. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Then go to the next step.
8	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Reconnect the disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC from the climate control unit memory using the M-MDS. (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the climate control unit. (See FRONT CLIMATE CONTROL UNIT REMOVAL/INSTALLATION.) Go to the next step.
8		No	Go to the next step.
9	VERIFY THAT NO OTHER DTCs ARE PRESENT • Verify other DTCs displayed. • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
9		No	DTC troubleshooting completed.