DTC P0A12:00 [i-ELOOP]

id130201001800

Note
•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".
•  If the capacitor (i-ELOOP) voltage is low after replacing the DC-DC converter (i-ELOOP), the i-ELOOP indicator light (green) flashes until the capacitor (i-ELOOP) voltage is approx. 9.5 V. (Without multi-information display)
•  If the capacitor (i-ELOOP) voltage is low after replacing the DC-DC converter (i-ELOOP), the i-ELOOP indication is displayed in the multi-information display until the capacitor (i-ELOOP) voltage is approx. 9.5 V. (With multi-information display)

Details On DTCs

DESCRIPTION

DC-DC converter (i-ELOOP): low input
DETECTION CONDITION
Determination conditions
•  DC-DC converter (i-ELOOP) terminal 2A voltage is specified value or less.
Preconditions
•  Ignition switched ON
Malfunction determination period
•  5 s period
Drive cycle
•  1
Self test type
•  CMDTC self test, ODDTC self test
Sensor used
•  DC-DC converter (i-ELOOP)
FAIL-SAFE FUNCTION
•  Inhibits engine-stop by operating the i-stop function.
•  Switches to bypass mode which shuts the capacitor (i-ELOOP) off.
VEHICLE STATUS WHEN DTCs ARE OUTPUT
•  Flashes i-stop warning light (amber).
•  A warning message is displayed on the center display.
•  The following vehicle conditions differ depending on the type of malfunction
?  Illuminates charging system warning light.
?  Illuminates master warning light.
•  If the vehicle continues to be driven while the DTC is detected the battery will be depleted.
?  A malfunction occurs with an electrical device and the vehicle stops.
POSSIBLE CAUSE
•  Connector or terminal malfunction of the following parts:
?  PCM (PCM DTC may be detected simultaneously)
?  Generator
?  Capacitor (i-ELOOP)
?  DC-DC converter (i-ELOOP)
?  Electrical load part which is connected to DC-DC converter (i-ELOOP) terminal 4A
•  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 2A
?  IG1 relay terminal C—Generator terminal 2C (PCM DTC P2503:00 may be detected simultaneously)
•  Open circuit in wiring harness between the following terminals:
?  IG1 relay terminal C—Generator terminal 2C (PCM DTC P2503:00 may be detected simultaneously)
•  DC-DC converter (i-ELOOP) malfunction

System Wiring Diagram

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Function Explanation (DTC Detection Outline)

•  With this diagnosis, a voltage of nearly 0 V at the DC-DC converter (i-ELOOP) terminal 2A is detected for verification of vehicle malfunctions/safety assurance.

Repeatability Verification Procedure

1.  Clear the DTC for the DC-DC converter (i-ELOOP) using the M-MDS. (See CLEARING DTC [i-ELOOP].)
2.  Start the engine.
3.  Leave for 180 s while idling with no electrical load.
4.  Leave for 30 s while idling with high electrical load.

PID Item/Simulation Item Used In Diagnosis

•  Not applicable

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 off, then ON (engine off).
•  Perform the DC-DC converter (i-ELOOP) DTC inspection using the M-MDS.
•  Is the DTC P1628:11 or U3000:49 also present?
Yes
Go to the applicable DTC inspection.
(See DTC P1628:11 [i-ELOOP].)
(See DTC U3000:49 [i-ELOOP].)
Go to the next step.
No
Go to the next step.
3
PURPOSE: VERIFY IF POWER SUPPLY IS AFFECTED BY DTC RELATED TO PCM
•  Perform the PCM DTC inspection using the M-MDS.
•  Is the DTC P0A94:00 or P2503:00 also present?
Yes
Go to the applicable DTC inspection.
(See DTC P0A94:00 [PCM (SKYACTIV-G 2.5T)].)
(See DTC P2503:00 [PCM (SKYACTIV-G 2.5T)].)
Go to the troubleshooting procedure to perform the procedure from Step 1.
No
Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure

Intention of troubleshooting procedure
•  Step 1—3
?  Verifying malfunction related to DC-DC converter (i-ELOOP) terminal 2A
•  Step 4—5
?  Verifying/replacing malfunctioning part
•  Step 6—7
?  Verify that primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

RESULTS

ACTION
1
PURPOSE: VERIFY IF CONNECTOR DAMAGE OF EACH PART AFFECTS DIAGNOSTIC RESULTS
•  Switch the ignition off.
•  Disconnect the negative battery terminal.
•  Remove the service plug.
•  Disconnect the connector of the following parts.
?  Generator
?  Capacitor (i-ELOOP)
?  DC-DC converter (i-ELOOP)
•  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 3.
No
Go to the next step.
2
PURPOSE: VERIFY IF SHORT TO GROUND 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) and body ground:
?  Capacitor (i-ELOOP) terminal 2A
?  Capacitor (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 2A
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 Step 4.
3
PURPOSE: INSPECT CAPACITOR (i-ELOOP) FOR MALFUNCTION DEPENDING ON REPEATABILITY
•  Always reconnect all disconnected connectors.
•  Reinstall the service plug.
•  Reconnect the negative battery terminal.
•  Clear the DTC for the DC-DC converter (i-ELOOP) using the M-MDS.
•  Implement the repeatability verification procedure.
•  Retrieve the DC-DC converter (i-ELOOP) DTCs using the M-MDS.
•  Is the same DTC present?
Yes
Note
•  A fuse is blown in the capacitor (i-ELOOP) due to excess current can be considered.
Replace the capacitor (i-ELOOP).
(See CAPACITOR (i-ELOOP) REMOVAL/INSTALLATION [i-ELOOP].)
Go to Step 6.
No
Go to Step 7.
4
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 any malfunction:
?  Repair or replace the malfunctioning part according to the inspection results, then go to Step 6.
•  If there is no malfunction:
?  Go to the next step.
5
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
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.
6
PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION
•  Always reconnect all disconnected connectors.
•  Reinstall the service plug.
•  Reconnect the negative battery terminal.
•  Start the engine and leave for 100 s or more.
•  Clear the DTC for the DC-DC converter (i-ELOOP) using the M-MDS.
•  Implement the repeatability verification procedure.
•  Retrieve the DC-DC converter (i-ELOOP) DTCs using the M-MDS.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 4.
No
Go to the next step.
7
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 [i-ELOOP].)
No
DTC troubleshooting completed.