DTC U3003:16 [i-ELOOP]

id130201001200

DTC U3003:16

DC-DC converter (i-ELOOP) system: power supply voltage low input

DETECTION CONDITION

•  The following all conditions are met for a continuous 5 s period:

―  DC-DC converter (i-ELOOP) terminal 4A voltage: 8 V or less

―  DC-DC converter (i-ELOOP) terminal 2A voltage: 8 V or less

FAIL-SAFE FUNCTION

•  Not applicable

POSSIBLE CAUSE

•  PCM DTC or pending code is stored.

•  Battery malfunction

•  Ignition relay (IG1_STAB) malfunction

•  Ignition relay (ACC_STAB) malfunction

•  DC-DC converter (i-ELOOP) connector or terminals malfunction

•  Malfunction in the following fuses:

―  STARTER 250 A fuse

―  MAIN 200 A fuse

―  DCDC REG 30 A fuse

―  METER2 7.5 A fuse

―  AUDIO2 7.5 A fuse

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

―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A

―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B

―  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C

―  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C

•  Open circuit in wiring harness between the following terminals:

―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A

―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B

―  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C

―  DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C

•  Generator malfunction

•  DC-DC converter (i-ELOOP) malfunction

DTC U3003:16	DC-DC converter (i-ELOOP) system: power supply voltage low input
DETECTION CONDITION	• The following all conditions are met for a continuous 5 s period: ― DC-DC converter (i-ELOOP) terminal 4A voltage: 8 V or less ― DC-DC converter (i-ELOOP) terminal 2A voltage: 8 V or less
FAIL-SAFE FUNCTION	• Not applicable
POSSIBLE CAUSE	• PCM DTC or pending code is stored. • Battery malfunction • Ignition relay (IG1_STAB) malfunction • Ignition relay (ACC_STAB) malfunction • DC-DC converter (i-ELOOP) connector or terminals malfunction • Malfunction in the following fuses: ― STARTER 250 A fuse ― MAIN 200 A fuse ― DCDC REG 30 A fuse ― METER2 7.5 A fuse ― AUDIO2 7.5 A fuse • Short to ground in wiring harness between the following terminals: ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C • Open circuit in wiring harness between the following terminals: ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C • Generator malfunction • DC-DC converter (i-ELOOP) malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
1		No	Go to the next step.
2	VERIFY PCM DTCs • Switch the ignition off, then ON (engine off). • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Are any DTCs present?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
2		No	Go to the next step.
3	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 11. (See BATTERY RECHARGING [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
3		No	Go to the next step.
4	INSPECT DC-DC CONVERTER (i-ELOOP) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Remove the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) • Disconnect the DC-DC converter (i-ELOOP) connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 11.
4		No	Go to the next step.
5	INSPECT IGNITION RELAY (IG1_STAB) • Remove the ignition relay (IG1_STAB). • Inspect the ignition relay (IG1_STAB). (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the ignition relay (IG1_STAB), then go to Step 11.
5		No	Go to the next step.
6	INSPECT IGNITION RELAY (ACC_STAB) • Remove the ignition relay (ACC_STAB). • Inspect the ignition relay (ACC_STAB). (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the ignition relay (ACC_STAB), then go to Step 11.
6		No	Go to the next step.
7	INSPECT FUSE • Remove the following fuses: ― STARTER 250 A fuse ― MAIN 200 A fuse ― DCDC REG 30 A fuse ― METER2 7.5 A fuse ― AUDIO2 7.5 A fuse • Inspect the following fuses: ― STARTER 250 A fuse ― MAIN 200 A fuse ― DCDC REG 30 A fuse ― METER2 7.5 A fuse ― AUDIO2 7.5 A fuse • Are all the fuses normal?	Yes	Install all the removed fuses, then go to the next step.
7		No	If the fuse is blown: • Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C 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 malfunctioning fuse. If the fuse is damaged: • Replace the malfunctioning fuse. Go to Step 11.
8	INSPECT DC-DC CONVERTER (i-ELOOP) CIRCUIT FOR SHORT TO GROUND • Ignition relay (IG1_STAB) and ignition relay (ACC_STAB) are removed. • Verify that the DC-DC converter (i-ELOOP) connector is disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― DC-DC converter (i-ELOOP) terminal 4A ― DC-DC converter (i-ELOOP) terminal 2B ― DC-DC converter (i-ELOOP) terminal 2A • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A • Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B • DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C • DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C 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 Step 11.
8		No	Go to the next step.
9	INSPECT DC-DC CONVERTER (i-ELOOP) CIRCUIT FOR OPEN CIRCUIT • Ignition relay (IG1_STAB) and ignition relay (ACC_STAB) are removed. • Verify that the DC-DC converter (i-ELOOP) connector is disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ― Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C ― DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A • Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B • DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (IG1_STAB) terminal C • DC-DC converter (i-ELOOP) terminal 2A—Ignition relay (ACC_STAB) terminal C 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 GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR INSPECTION [SKYACTIV-D 2.2 (WITH i-ELOOP)].) • Is there any malfunction?	Yes	Replace the generator, then go to the next step. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITH i-ELOOP)].) (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-D 2.2 (WITH i-ELOOP)].)
10		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Reinstall the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5].) • Clear the DTC for the DC-DC converter (i-ELOOP) using the M-MDS. (See CLEARING DTC [i-ELOOP].) • Switch the ignition off. • Switch the ignition ON (engine off) and wait for 5 s or more. • Retrieve the DC-DC converter (i-ELOOP) DTCs using the M-MDS. (See DTC INSPECTION [i-ELOOP].) • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the DC-DC converter (i-ELOOP). (See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].) Go to the next step.
11		No	Go to the next step.
12	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [i-ELOOP].)
12		No	DTC troubleshooting completed.