DTC U3003:16 [INSTRUMENT CLUSTER]

id0902e8999400

Description

Low power supply voltage input to instrument cluster

Detection condition

•  Instrument cluster power supply circuit voltage of 10 V or less is detected with the ignition switched ON (engine off or on).

Fail-safe

Not applicable

Possible cause

•  DTCs are stored in the PCM.

•  Battery malfunction

•  Generator malfunction

•  Instrument cluster connector or terminal malfunction

•  Instrument cluster power supply circuit malfunction

―  Short to ground in wiring harness between METER1 10 A fuse and instrument cluster terminal 1S

―  METER1 10 A fuse malfunction

―  Open circuit in wiring harness between IG1 relay terminal C and instrument cluster terminal 1S

•  Ignition relay (IG1_STAB) malfunction

•  DC-DC converter connector or terminal malfunction

•  Short to ground in wiring harness between the following terminals:

―  DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D

―  Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I

•  METER2 7.5 A fuse malfunction

•  Open circuit in wiring harness between the following terminals:

―  DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D

―  Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I

•  DC-DC converter malfunction

•  Instrument cluster malfunction

Description	Low power supply voltage input to instrument cluster
Detection condition	• Instrument cluster power supply circuit voltage of 10 V or less is detected with the ignition switched ON (engine off or on).
Fail-safe	Not applicable
Possible cause	• DTCs are stored in the PCM. • Battery malfunction • Generator malfunction • Instrument cluster connector or terminal malfunction • Instrument cluster power supply circuit malfunction ― Short to ground in wiring harness between METER1 10 A fuse and instrument cluster terminal 1S ― METER1 10 A fuse malfunction ― Open circuit in wiring harness between IG1 relay terminal C and instrument cluster terminal 1S • Ignition relay (IG1_STAB) malfunction • DC-DC converter connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ― DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D ― Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I • METER2 7.5 A fuse malfunction • Open circuit in wiring harness between the following terminals: ― DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D ― Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I • DC-DC converter malfunction • Instrument cluster malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs • Perform the DTC inspection for the PCM 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 displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.5)].) (See DTC TABLE [PCM (SKYACTIV-D 2.2)].)
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • Is the battery normal?	Yes	Go to the next step.
2		No	Recharge or replace the battery, then go to Step 11. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
3	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.
3		No	Replace the generator, then go to Step 11. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
4	INSPECT INSTRUMENT CLUSTER CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the instrument cluster connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
4		No	Repair or replace the connector, then go to Step 11.
5	VERIFY INSTRUMENT CLUSTER POWER SUPPLY VOLTAGE • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Is the VPWR monitor value B+?	Yes	Go to the next step.
5		No	Inspect the METER1 10 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between METER1 10 A fuse and instrument cluster terminal 1S. 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 IG1 relay terminal C and instrument cluster terminal 1S. 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.
6	INSPECT IGNITION RELAY (IG1_STAB) • 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.
6		No	Replace the ignition relay (IG1_STAB), then go to Step 11. (See RELAY LOCATION.)
7	INSPECT DC-DC CONVERTER CONNECTOR CONDITION • Disconnect the DC-DC converter connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
7		No	Repair or replace the connector, then go to Step 11.
8	INSPECT DC-DC CONVERTER CIRCUIT FOR SHORT TO GROUND • Verify that the DC-DC converter and instrument cluster connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Ignition relay (IG1_STAB) terminal D ― Instrument cluster terminal 1I • Is there continuity?	Yes	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 the following terminals: • METER2 7.5 A fuse—Ignition relay (IG1_STAB) terminal D • Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I 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. Go to Step 11.
8		No	Go to the next step.
9	INSPECT DC-DC CONVERTER CIRCUIT FOR OPEN CIRCUIT • Verify that the DC-DC converter and instrument cluster connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D ― Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I • Is there continuity?	Yes	Go to the next step.
9		No	Inspect the METER2 7.5 A 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 the following terminals: • DC-DC converter terminal K—Ignition relay (IG1_STAB) terminal D • Ignition relay (IG1_STAB) terminal C—Instrument cluster terminal 1I 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 DC-DC CONVERTER • Inspect the DC-DC converter. (See DC-DC CONVERTER INSPECTION [SKYACTIV-G 2.5].) (See DC-DC CONVERTER INSPECTION [SKYACTIV-D 2.2].) • Is the DC-DC converter normal?	Yes	Go to the next step.
10		No	Replace the DC-DC converter, then go to the next step. (See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-G 2.5].) (See DC-DC CONVERTER REMOVAL/INSTALLATION [SKYACTIV-D 2.2].)
11	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the disconnected negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear DTC for the instrument cluster using the M-MDS. (See CLEARING DTC [INSTRUMENT CLUSTER].) • Retrieve the DTC inspection for the instrument cluster using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Is the same Pending DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
11		No	Go to the next step.
12	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER].)
12		No	DTC troubleshooting completed.