DTC P2502:00 [PCM (SKYACTIV-G 2.5T)]

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Note
•  To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".

Details On DTCs (Without i-ELOOP)

DESCRIPTION

Generator system: Malfunction in voltage generated by generator
DETECTION CONDITION
Determination conditions
•  The voltage generated by the generator is 17 V or higher and the battery voltage is 11 V or less for a continuous specified time.
Preconditions
•  While engine is running
Malfunction determination period
•  5 s period
Drive cycle
•  1
Self test type
•  CMDTC self test
Sensor used
•  PCM
•  Generator
FAIL-SAFE FUNCTION
•  Inhibits engine-stop by operating the i-stop function. (With i-stop)
•  Generator control is inhibited.
VEHICLE STATUS WHEN DTCs ARE OUTPUT
•  Flash the i-stop warning light (amber). (With i-stop)
•  A warning message is displayed in the display.
•  Illuminates charging system 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.
•  The following vehicle conditions differ depending on the type of malfunction:
?  Vehicle shock may occur due to generator load.
?  Idling feel due to generator-stop may occur.
POSSIBLE CAUSE
•  Poor connection of the following parts:
?  Battery
?  Generator
?  PCM
•  Connector or terminal malfunction of the following parts:
?  Battery
?  Generator
?  PCM
•  Short to ground or open circuit in generator charge/discharge circuit
?  Short to ground in wiring harness between battery positive terminal and generator terminal 1A
?  STR 200 A fuse malfunction
?  Open circuit in wiring harness between battery positive terminal and generator terminal 1A
•  Generator malfunction
•  Battery malfunction
•  PCM malfunction

System Wiring Diagram (Without i-ELOOP)

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Function Explanation (DTC Detection Outline) (Without i-ELOOP)

•  When the charge/discharge circuit for the power supplying the vehicle is normal, the vehicle will operate normally. In this diagnostic, a low vehicle supply voltage is detected even though the generator is generating power, a malfunction in the charge/discharge circuit is detected, and verification of vehicle malfunctions/safety assurance is performed.

Repeatability Verification Procedure (Without i-ELOOP)

1.  Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)].)
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 (Without i-ELOOP)

•  Not applicable

Function Inspection Using M-MDS (Without i-ELOOP)

STEP

INSPECTION

RESULTS

ACTION
1
PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the snapshot data on the repair order.
—
Go to the troubleshooting procedure to perform the procedure from Step 1.

Troubleshooting Diagnostic Procedure (Without i-ELOOP)

Intention of troubleshooting procedure
•  Step 1—6
?  Perform an inspection of each signal transmission system.
•  Step 7
?  Perform a unit inspection of the generator.
•  Step 8—10
?  Verify that the primary malfunction is resolved and there are no other malfunctions.

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 POOR CONNECTION OF EACH PART AFFECTS DIAGNOSTIC RESULTS
•  Switch the ignition off.
•  Inspect the connection condition (part installation condition, connector connection condition) for the following parts:
?  Battery
?  Generator
?  PCM
•  Is the connection condition (part installation condition, connector connection condition) for each part normal?
Yes
Go to the next step.
No
Connect each part or the connector correctly, then go to Step 8.
3
PURPOSE: VERIFY IF CONNECTOR DAMAGE OF EACH PART AFFECTS DIAGNOSTIC RESULTS
•  Disconnect the connector of the following parts.
?  Battery
?  Generator
?  PCM
•  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 8.
No
Go to the next step.
4
PURPOSE: INSPECT FUSE
•  Remove the STR 200 A fuse.
•  Inspect the STR 200 A fuse.
•  Is there any malfunction?
Yes
If the fuse is blown:
•  Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and generator terminal 1A.
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 8.
No
Reinstall the STR 200 A fuse, then go to the next step.
5
PURPOSE: VERIFY IF SHORT TO GROUND IN GENERATOR CHARGE/DISCHARGE CIRCUIT AFFECTS DIAGNOSTIC RESULTS
•  Verify that the battery, generator and PCM connectors are disconnected.
•  Inspect for continuity between generator terminal 1A (wiring harness-side) and body ground.
•  Is there continuity?
Yes
Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and generator terminal 1A.
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 8.
No
Go to the next step.
6
PURPOSE: VERIFY IF OPEN CIRCUIT IN GENERATOR CHARGE/DISCHARGE CIRCUIT AFFECTS DIAGNOSTIC RESULTS
•  Verify that the battery, generator and PCM connectors are disconnected.
•  Inspect for continuity between battery positive terminal (wiring harness-side) and generator terminal 1A (wiring harness-side).
•  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 battery positive terminal and generator terminal 1A.
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 8.
7
PURPOSE: DETERMINE INTEGRITY OF GENERATOR
•  Inspect the generator.
•  Is there any malfunction?
Yes
Replace the generator, then go to the next step.
(See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 2.5T)].)
No
Go to the next step.
8
PURPOSE: VERIFY CONDITIONS OF BATTERY
•  Inspect the battery.
—
Follow the inspection instructions, then go to the next step.
9
PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Implement the repeatability verification procedure.
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
10
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 [PCM (SKYACTIV-G 2.5T)].)
No
DTC troubleshooting completed.

Details On DTCs (With i-ELOOP)

DESCRIPTION

Generator system: Malfunction in voltage generated by generator
DETECTION CONDITION
Determination conditions
•  Battery voltage is 11 V or less and condition in which current sensor detects battery charging for specified period continues
Preconditions
•  All of the following conditions are met:
?  While engine is running
?  CAN communication condition related to current sensor is normal
Malfunction determination period
•  5 s period
Drive cycle
•  1
Self test type
•  CMDTC self test
Sensor used
•  Current sensor
•  Front body control module (FBCM)
•  PCM
•  Generator
•  DC-DC converter (i-ELOOP)
FAIL-SAFE FUNCTION
•  Inhibits engine-stop by operating the i-stop function.
•  Generator switch to default mode requested (14.5 V constant voltage power generation).
•  Transition to i-ELOOP bypass mode.
VEHICLE STATUS WHEN DTCs ARE OUTPUT
•  Flashes i-stop warning light (amber).
•  A warning message is displayed in the display.
•  Illuminates charging system 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.
•  The following vehicle conditions differ depending on the type of malfunction:
?  Vehicle shock may occur due to generator load.
?  Idling feel due to generator-stop may occur.
POSSIBLE CAUSE
•  Poor connection of the following parts:
?  Battery
?  Generator
?  PCM
?  Capacitor (i-ELOOP)
?  DC-DC converter (i-ELOOP)
•  Connector or terminal malfunction of the following parts:
?  Battery
?  Generator
?  PCM
?  Capacitor (i-ELOOP)
?  DC-DC converter (i-ELOOP)
•  DCDC 200 A fuse malfunction
•  Short to ground in wiring harness between the following terminals:
?  DC-DC converter (i-ELOOP) terminal 3A—Battery positive terminal
?  DC-DC converter (i-ELOOP) terminal 2A—Capacitor (i-ELOOP) terminal 3A
?  DC-DC converter (i-ELOOP) terminal 1D—PCM terminal 2L
?  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A
•  Open circuit in wiring harness between the following terminals:
?  DC-DC converter (i-ELOOP) terminal 3A—Battery positive terminal
?  DC-DC converter (i-ELOOP) terminal 2A—Capacitor (i-ELOOP) terminal 3A
?  DC-DC converter (i-ELOOP) terminal 1D—PCM terminal 2L
?  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A
•  Capacitor (i-ELOOP) malfunction
•  Generator malfunction
•  Current sensor malfunction
•  Front body control module (FBCM) malfunction
•  DC-DC converter (i-ELOOP) malfunction
•  PCM malfunction

System Wiring Diagram (With i-ELOOP)

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Function Explanation (DTC Detection Outline) (With i-ELOOP)

•  When the charge/discharge circuit for the power supplying the vehicle is normal, the vehicle will operate normally. In this diagnostic, a low vehicle supply voltage is detected even though the generator is generating power, a malfunction in the charge/discharge circuit is detected, and verification of vehicle malfunctions/safety assurance is performed.

Repeatability Verification Procedure (With i-ELOOP)

1.  Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)].)
2.  Start the engine.
3.  Leave for 30 s while idling with high electrical load.

PID Item/Simulation Item Used In Diagnosis (With i-ELOOP)

•  Not applicable

Function Inspection Using M-MDS (With i-ELOOP)

STEP

INSPECTION

RESULTS

ACTION
1
PURPOSE: RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the snapshot data on the repair order.
—
Go to the next step.
2
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.
3
PURPOSE: VERIFY IF GENERATOR VOLTAGE IS FALSELY RECOGNIZED BY DTC RELATED CURRENT SENSOR
•  Switch the ignition off, then ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Is the PENDING CODE/DTC P058A:00 also present?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC P058A:00 [PCM (SKYACTIV-G 2.5T)].)
Go to the next step.
No
Go to the next step.
4
PURPOSE: VERIFY DTC
•  Retrieve the PCM DTCs using the M-MDS.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [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 (With i-ELOOP)

Intention of troubleshooting procedure
•  Step 1
?  Perform inspection of generator voltage.
•  Step 2—6
?  Perform an inspection of each signal transmission system.
•  Step 7
?  Perform a unit inspection of the generator.
•  Step 8—10
?  Verify that primary malfunction is resolved and there are no other malfunctions.

STEP

INSPECTION

RESULTS

ACTION
1
PURPOSE: DETERMINE THE MALFUNCTION CAUSE BY VERIFYING THE OUTPUT VOLTAGE OF GENERATOR TERMINAL 1A.
•  Start the engine.
•  Measure the voltage at the generator terminal 1A (wiring harness-side).
•  Is the voltage approx. 0 V?
Yes
Perform the troubleshooting procedure for DTC P2503:00.
(See DTC P2503:00 [PCM (SKYACTIV-G 2.5T)].)
Go to the next step.
No
Go to the next step.
2
PURPOSE: VERIFY IF POOR CONNECTION OF EACH PART AFFECTS DIAGNOSTIC RESULTS
•  Switch the ignition off.
•  Remove the service plug.
•  Inspect the connection condition (part installation condition, connector connection condition) for the following parts:
?  Battery
?  Generator
?  PCM
?  Capacitor (i-ELOOP)
?  DC-DC converter (i-ELOOP)
•  Is the connection condition (part installation condition, connector connection condition) for each part normal?
Yes
Go to the next step.
No
Connect each part or the connector correctly, then go to Step 9.
3
PURPOSE: VERIFY IF CONNECTOR DAMAGE OF EACH PART AFFECTS DIAGNOSTIC RESULTS
•  Disconnect the connector of the following parts.
?  Battery
?  Generator
?  PCM
?  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 9.
No
Go to the next step.
4
PURPOSE: INSPECT FUSE
•  Remove the DCDC 200 A fuse.
•  Inspect the DCDC 200 A fuse.
•  Is there any malfunction?
Yes
If the fuse is blown:
•  Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter (i-ELOOP) terminal 3A and battery positive 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.
?  Replace the fuse.
If the fuse is damaged:
•  Replace the fuse.
Go to Step 9.
No
Reinstall the DCDC 200 A fuse, then go to the next step.
5
PURPOSE: VERIFY IF SHORT TO GROUND IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS
•  Verify that the battery, generator, PCM, 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:
?  DC-DC converter (i-ELOOP) terminal 3A
?  DC-DC converter (i-ELOOP) terminal 2A
?  DC-DC converter (i-ELOOP) terminal 1D
?  Generator terminal 1A
•  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 3A—Battery positive terminal
•  DC-DC converter (i-ELOOP) terminal 2A—Capacitor (i-ELOOP) terminal 3A
•  DC-DC converter (i-ELOOP) terminal 1D—PCM terminal 2L
•  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A
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 9.
No
Go to the next step.
6
PURPOSE: VERIFY IF OPEN CIRCUIT IN EACH WIRING HARNESS AFFECTS DIAGNOSTIC RESULTS
•  Verify that the battery, generator, PCM, capacitor (i-ELOOP), and DC-DC converter (i-ELOOP) connectors are disconnected.
•  Inspect for continuity between the following terminals (wiring harness-side):
?  DC-DC converter (i-ELOOP) terminal 3A—Battery positive terminal
?  DC-DC converter (i-ELOOP) terminal 2A—Capacitor (i-ELOOP) terminal 3A
?  DC-DC converter (i-ELOOP) terminal 1D—PCM terminal 2L
?  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A
•  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:
•  DC-DC converter (i-ELOOP) terminal 3A—Battery positive terminal
•  DC-DC converter (i-ELOOP) terminal 2A—Capacitor (i-ELOOP) terminal 3A
•  DC-DC converter (i-ELOOP) terminal 1D—PCM terminal 2L
•  Capacitor (i-ELOOP) terminal 2A—Generator terminal 1A
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 9.
7
PURPOSE: DETERMINE INTEGRITY OF GENERATOR
•  Inspect the generator.
•  Is there any malfunction?
Yes
Replace the generator, then go to the next step.
(See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 2.5T)].)
No
Go to the next step.
8
PURPOSE: VERIFY CONDITIONS OF BATTERY
•  Inspect the battery.
—
Follow the inspection instructions, then go to the next step.
9
PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION
•  Always reconnect all disconnected connectors.
•  Reinstall the service plug.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Implement the repeatability verification procedure.
•  Perform the DTC Reading Procedure.
•  Is the same DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
10
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 [PCM (SKYACTIV-G 2.5T)].)
No
DTC troubleshooting completed.