DTC P0A12:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0102h4569000

Details On DTCs

DESCRIPTION	DC-DC converter (i-ELOOP): low input/output
DETECTION CONDITION	Determination conditions	•  Any one of the following conditions is met: ―  Any DC-DC converter (i-ELOOP) terminal value, either 2A, 3A, or 4A, is specified value or less ―  Ignition switch ON condition detected by DC-DC converter (i-ELOOP) and PCM differ
	Preconditions	•  Not applicable
	Drive cycle	•  1
	Self test type	•  CMDTC self test
	Sensor used	•  Not applicable
FAIL-SAFE FUNCTION	•  Inhibits engine-stop by operating the i-stop function. •  Depending on the type of malfunction, any of the following controls may be implemented. ―  Transition to i-ELOOP bypass mode. ―  i-ELOOP bypass mode inhibited.
VEHICLE STATUS WHEN DTCs ARE OUTPUT	•  Illuminates the i-stop warning light (amber) •  Illuminates the charging system warning light •  Depending on the type of malfunction, the following control may be implemented. ―  i-ELOOP pre-charge mode operates.
POSSIBLE CAUSE	•  Connector or terminal malfunction of the following parts: ―  PCM ―  Generator ―  Battery ―  Capacitor (i-ELOOP) ―  DC-DC converter (i-ELOOP) ―  Electric load part connected to C/U IG1 15-A fuse •  Malfunction in the following fuses: ―  DCDC REG 30A fuse ―  STARTER 250A fuse •  Short to ground in wiring harness between the following terminals: ―  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A ―  Capacitor (i-ELOOP) terminal 3A—DC-DC converter (i-ELOOP) terminal 3A ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ―  IG1 relay terminal C—DC-DC converter (i-ELOOP) terminal 1H (DTC P1628:11 may be detected simultaneously) ―  IG1 relay terminal C—Generator terminal 2C (DTC P1628:11, P2503:00 may be detected simultaneously) ―  Electric load part connected to C/U IG1 15-A fuse—C/U IG1 15 A fuse ―  DC-DC converter (i-ELOOP) terminal 2A—AUDIO2 7.5 A ―  DC-DC converter (i-ELOOP) terminal 2A—METER2 7.5 A •  Open circuit in wiring harness between the following terminals: ―  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A ―  Capacitor (i-ELOOP) terminal 3A—DC-DC converter (i-ELOOP) terminal 3A ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A ―  IG1 relay terminal C—DC-DC converter (i-ELOOP) terminal 1H (DTC P1628:11 may be detected simultaneously) ―  Electric load part connected to C/U IG1 15-A fuse—C/U IG1 15 A fuse •  High-power load, non-genuine part installed to line connected to DC-DC converter (i-ELOOP) terminal 2A (DTC P0A94:00 may be detected simultaneously) •  DC-DC converter (i-ELOOP) malfunction •  PCM malfunction

System Wiring Diagram

am6zzw00011828

Function Explanation (DTC Detection Outline)

Repeatability Verification Procedure

PID Item/Simulation Item Used In Diagnosis

Function Inspection Using M-MDS

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: 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.
		No	Go to the next step.
2	PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO DC-DC CONVERTER (i-ELOOP) •  Switch the ignition to off, then to ON (engine off or on). •  Perform the DC-DC converter (i-ELOOP) DTC inspection using the M-MDS. (See DTC INSPECTION [i-ELOOP].) •  Is the PENDING CODE/DTC U3000:49 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC U3000:49 [i-ELOOP].)
		No	Go to the next step.
3	PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO DC-DC CONVERTER (i-ELOOP) •  Switch the ignition to off, then to ON (engine off or on). •  Perform the DC-DC converter (i-ELOOP) DTC inspection using the M-MDS. (See DTC INSPECTION [i-ELOOP].) •  Is the PENDING CODE/DTC P1628:11 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC P1628:11 [i-ELOOP].)
		No	Go to the next step.
4	PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO PCM •  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the PENDING CODE/DTC P0A94:00 also present?	Yes	Go to Step 7.
		No	Go to the next step.
5	PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO PCM •  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the PENDING CODE/DTC P1794:00 or P2503:00 also present?	Yes	Go to the applicable PENDING CODE or DTC inspection. (See DTC P1794:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See DTC P2503:00 [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
		No	Go to the next step.
6	PURPOSE: DETERMINE IF MALFUNCTION CAUSED BY DC-DC CONVERTER (i-ELOOP) •  Start the engine. •  Is “i-ELOOP charging. Stop the vehicle and wait a minute” displayed in the LCD?	Yes	Go to the troubleshooting procedure to perform the procedure from Step 1.
		No	Go to the next step.
7	PURPOSE: DETERMINE LOCATION OF MALFUNCTION OCCURRENCE FROM BURN-OUT OF DCDC REG 30A FUSE •  Switch the ignition off. •  Inspect the DCDC REG 30A fuse. •  Is the DCDC REG 30A fuse burnt out?	Yes	Go to the troubleshooting procedure to perform the procedure from Step 4.
		No	Go to the next step.
8	PURPOSE: DETERMINE LOCATION OF MALFUNCTION FROM OPERATION CONDITION OF VEHICLE ELECTRICAL DEVICES •  Turn on the audio unit/car navigation unit power. •  Can the power be turned on?	Yes	Go to the next step.
		No	Go to the troubleshooting procedure to perform the procedure from Step 8.
9	PURPOSE: DETERMINE LOCATION OF MALFUNCTION OCCURRENCE FROM BURN-OUT OF STARTER 250A FUSE •  Switch the ignition off. •  Inspect the STARTER 250A fuse. •  Is the STARTER 250A fuse burnt out?	Yes	Go to the troubleshooting procedure to perform the procedure from Step 9.
		No	Go to the troubleshooting procedure to perform the procedure from Step 11.

Troubleshooting Diagnostic Procedure

―  Verifying malfunction related to DC-DC converter (i-ELOOP) 3A terminal

―  Verifying malfunction related to DC-DC converter (i-ELOOP) 2A terminal

―  Verifying malfunction related to DC-DC converter (i-ELOOP) 4A terminal

―  Verifying/replacing malfunctioning part

―  Verify that primary malfunction is resolved and there are no other malfunctions.

STEP	INSPECTION	RESULTS	ACTION
1	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Switch the ignition to off. •  Disconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Disconnect the connector of the following parts. ―  Generator ―  DC-DC converter (i-ELOOP) ―  Capacitor (i-ELOOP) •  Inspect for continuity between the following terminals (wiring harness-side) and body ground: ―  Generator terminal 1A ―  Capacitor (i-ELOOP) terminal 2A ―  Capacitor (i-ELOOP) terminal 3A ―  DC-DC converter (i-ELOOP) terminal 3A •  Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: •  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A •  Capacitor (i-ELOOP) terminal 3A—DC-DC converter (i-ELOOP) terminal 3A 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 3.
		No	Go to the next step.
2	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Verify that the generator, capacitor (i-ELOOP), and DC-DC converter (i-ELOOP) connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): ―  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A ―  Capacitor (i-ELOOP) terminal 3A—DC-DC converter (i-ELOOP) terminal 3A •  Is there continuity?	Yes	Go to Step 11.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: •  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A •  Capacitor (i-ELOOP) terminal 3A—DC-DC converter (i-ELOOP) terminal 3A 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 the next step.
3	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Make sure to reconnect all disconnected connectors. •  Reconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Start the engine. •  Is "i-ELOOP charging? Stop the vehicle and wait a minute" displayed in the LCD, and the master warning light illuminated after approx. 3 min?	Yes	Note •  A fuse burn-out in the capacitor from excess current can be considered. Replace the capacitor (i-ELOOP). (See CAPACITOR (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].) Go to Step 14.
		No	Go to Step 14.
4	PURPOSE: VERIFY IF INSTALLATION OF NON-GENUINE PART IS CAUSING MALFUNCTION •  Verify if non-genuine part in which electric load occurs is installed. •  Is a non-genuine electrical part in which electric load occurs installed?	Yes	Explain to the customer that the vehicle is normal and that the i-ELOOP does not operate because of the vehicle's electrical load. Remove the non-genuine part in consultation with the customer. Go to Step 14.
		No	Go to the next step.
5	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Switch the ignition to off. •  Disconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Disconnect the DC-DC converter (i-ELOOP) connector. •  Inspect for continuity between the following terminals (wiring harness-side) and body ground: ―  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: •  DC-DC converter (i-ELOOP) terminal 2A—AUDIO2 7.5 A •  DC-DC converter (i-ELOOP) terminal 2A—METER2 7.5 A 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 DCDC REG 30A fuse. Go to Step 14.
		No	Go to the next step.
6	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  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 2B •  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 2B 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 DCDC REG 30A fuse. Go to Step 14.
		No	Go to the next step.
7	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Repelace the DCDC REG 30A fuse. •  Make sure to reconnect all disconnected connectors. •  Reconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Start the engine. •  Inspect the DCDC REG 30A fuse. •  Is the DCDC REG 30A fuse burnt out?	Yes	Replace the DCDC REG 30A fuse and DC-DC converter (i-ELOOP). (See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].) Go to Step 14.
		No	Go to Step 14.
8	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Switch the ignition to off. •  Disconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Disconnect the DC-DC converter (i-ELOOP) connector. •  Inspect for continuity between the following terminals (wiring harness-side): ―  DC-DC converter (i-ELOOP) terminal 2A—AUDIO2 7.5 A ―  DC-DC converter (i-ELOOP) terminal 2A—METER2 7.5 A ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B •  Is there continuity?	Yes	Go to the "Function Inspection Using M-MDS“ to perform the procedure from Step 8.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: •  DC-DC converter (i-ELOOP) terminal 2A—AUDIO2 7.5 A •  DC-DC converter (i-ELOOP) terminal 2A—METER2 7.5 A •  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 2B 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 14.
9	PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Switch the ignition to off. •  Disconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Disconnect the DC-DC converter (i-ELOOP) connector. •  Inspect for continuity between the following terminals (wiring harness-side) and body ground: ―  DC-DC converter (i-ELOOP) terminal 4A •  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 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 STARTER 250A fuse. Go to Step 14.
		No	Go to the next step.
10	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Repelace the STARTER 250A fuse. •  Make sure to reconnect all disconnected connectors. •  Reconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Start the engine. •  Inspect the STARTER 250A fuse. •  Is the STARTER 250A fuse burnt out?	Yes	Replace the STARTER 250A fuse and DC-DC converter (i-ELOOP). (See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].) Go to Step 14.
		No	Go to Step 14.
11	PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS •  Switch the ignition to off. •  Disconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Disconnect the DC-DC converter (i-ELOOP) connector. •  Inspect for continuity between the following terminals (wiring harness-side): ―  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A •  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 the following terminals: •  Battery positive terminal—DC-DC converter (i-ELOOP) terminal 4A 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 the next step.
12	PURPOSE: VERIFY IF MALFUNCTION OCCURRING IS CAUSED BY WIRING HARNESS/CONNECTOR LOSS •  Have all the wiring harnesses/connectors which can be considered the cause of DTC P0A12:00 been inspected?	Yes	Go to the next step.
		No	Inspect all the related wiring harnesses/connectors. If there is a malfunction •  Repair or replace the connector and/or terminals, then go to Step 14. If there is no malfunction •  Go to the next step.
13	PURPOSE: VERIFY DC-DC converter (i-ELOOP) REPLACEMENT RECORD •  Is the DC-DC converter (i-ELOOP) being replaced within the troubleshooting diagnostic procedure this time?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) Go to the next step.
		No	Replace the DC-DC converter (i-ELOOP). (See DC-DC CONVERTER (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].) Go to the next step.
14	PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION •  Make sure to reconnect all disconnected connectors. •  Reconnect the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) •  Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) •  Perform the DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) •  Is the same DTC present?	Yes	Repeat the inspection from Step 12.
		No	Go to the next step.
15	PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION •  Is any other DTC or pending code stored?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5].)
		No	DTC troubleshooting completed.