DTC U3003:16, U3003:17 [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)]

id0702k3731000

System malfunction location	•  U3003:16: Climate control unit power supply circuit voltage below threshold (10 V or less) •  U3003:17: Climate control unit power supply circuit voltage above threshold (17.3 V or more)
Detection condition	•  Climate control unit power supply voltage is other than 10.1—17.2 V
Fail-safe function	Not applicable
Possible cause	•  Battery malfunction •  DTCs stored in PCM. •  Generator system malfunction •  Climate control unit connector or terminal malfunction •  Climate control unit power supply circuit malfunction: ―  Short to ground in wiring harness between climate control unit terminal W — ROOM 15 A fuse ―  Short to ground in wiring harness between climate control unit terminal X — front body control module (FBCM) terminal 1C ―  ROOM 15 A fuse malfunction ―  Open circuit in wiring harness between climate control unit terminal W — MAIN 200 A fuse ―  Open circuit in wiring harness between climate control unit terminal X — front body control module (FBCM) terminal 1C •  Climate control unit malfunction •  Front body control module (FBCM) malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	PERFORM PCM DTC INSPECTION •  Perform the PCM DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See ON-BOARD DIAGNOSTIC TEST [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, 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 (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
		No	Go to the next step.
2	PERFORM FRONT BODY CONTROL MODULE (FBCM) DTC INSPECTION •  Perform the front body control module (FBCM) DTC inspection using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) •  Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
		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 [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See BATTERY REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See BATTERY RECHARGING.) Then go to Step 11.
4	INSPECT GENERATOR •  Inspect the generator. (See GENERATOR INSPECTION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See GENERATOR INSPECTION [SKYACTIV-G 2.5T].) (See GENERATOR INSPECTION [WITHOUT i-ELOOP (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2].) •  Is the generator normal?	Yes	Go to the next step.
		No	Replace the generator. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) Then go to Step 11.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION •  Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].) •  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 11.
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): ―  Climate control unit terminal W •  Is the voltage 10.1—17.2 V?	Yes	Go to the next step.
		No	Inspect the ROOM 15 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 ROOM 15 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 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 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 11.
7	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY VOLTAGE •  Climate control unit connector is disconnected. •  Measure the voltage at the following terminals (wiring harness-side): ―  Climate control unit terminal X •  Is the voltage 10.1—17.2 V?	Yes	Go to Step 11.
		No	Go to the next step.
8	VERIFY FRONT BODY CONTROL MODULE (FBCM) CONNECTOR CONDITION •  Switch the ignition off. •  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the front body control module (FBCM) connector. (See FRONT BODY CONTROL MODULE (FBCM) 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 11.
9	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT (IG2) FOR OPEN CIRCUIT •  Climate control unit and front body control module (FBCM) connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): ―  Climate control unit terminal X—front body control module (FBCM) terminal 1C •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and front body control module (FBCM) 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. Go to Step 11.
10	INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT (IG2) FOR SHORT TO GROUND •  Climate control unit and front body control module (FBCM) connectors are disconnected. •  Inspect for continuity between the following terminal (wiring harness-side) and body ground: ―  Climate control unit terminal X •  Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and front body control module (FBCM) 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 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. Go to the next step.
		No	Go to the next step.
11	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN •  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 (MANUAL AIR CONDITIONER)].) •  Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)].) •  Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. •  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.
12	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 (MANUAL AIR CONDITIONER)].)
		No	DTC troubleshooting completed.