DTC P2101:00

Throttle valve actuator control motor circuit range/performance problem

DETECTION CONDITION

• The PCM turns the main relay on, but if the input voltage is 6.0 V or less, then the PCM determines that the main relay control circuit voltage is low.

• There is a system error in the electrical throttle control system of the PCM.

Diagnostic support note

• This is a continuous monitor (CCM).

• The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

• DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

• Restricts the upper limit of the engine speed.

• Stops the drive-by-wire control (throttle valve is open at approx. 8 ° by return spring force).

POSSIBLE CAUSE

• Short to ground or open circuit in main relay power supply circuit:

• MAIN 200 A fuse and/or ENG.MAIN 40 A fuse malfunction

• ENGINE2 15 A fuse malfunction

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

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

• Main relay terminal E—PCM terminal 2K

• PCM connector or terminals malfunction

• Open circuit in wiring harness between the following terminals:

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

• Main relay terminal E—PCM terminal 2K

• Throttle valve actuator and/or related circuit malfunction

• Throttle valve actuator malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

• Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• Switch the ignition off, then ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5].)

• Are any other PENDING CODEs and/or DTCs present?

Yes

Go to the applicable PENDING CODE or DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

Go to the next step.

4

• Switch the ignition off.

• Remove the main relay.

• Measure the voltage at the following terminals (wiring harness-side):

• Main relay terminal D

• Main relay terminal A

• Is the voltage B+?

Yes

Go to the next step.

No

Inspect the MAIN 200 A fuse and ENG.MAIN 40 A fuse.

• If the fuse is blown out:

• Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• MAIN 200 A fuse—Main relay terminal D

• MAIN 200 A fuse—Main relay terminal 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 fuse.

• If the fuse is damaged:

• Replace the fuse.

• If all fuses are normal:

• Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Battery positive terminal—Main relay terminal D

• Battery positive terminal—Main relay terminal 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 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 10.

5

• Remove the ENGINE2 15 A fuse.

• Inspect the ENGINE2 15 A fuse.

• Is there any malfunction?

Yes

If the fuse is blown out:

• Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

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 10.

No

Reinstall the ENGINE2 15 A fuse, then go to the next step.

6

• Main relay is removed.

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Main relay terminal C

• Main relay terminal E

• Is there continuity?

Yes

If the short to ground circuit could be detected in the wiring harness:

• Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

• Main relay terminal E—PCM terminal 2K

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.

If the short to ground circuit could not be detected in the wiring harness:

• Replace the PCM (short to ground in the PCM internal circuit).

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

Go to Step 10.

No

Go to the next step.

7

• Disconnect the PCM 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 10.

No

Go to the next step.

8

• Main relay is removed.

• Verify that the PCM connector is disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

• Main relay terminal E—PCM terminal 2K

• 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:

• Main relay terminal C—PCM terminal 1CK

• Main relay terminal C—PCM terminal 2S

• Main relay terminal E—PCM terminal 2K

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 10.

9

• Inspect the throttle valve actuator.

  (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G 2.5].)

  (See THROTTLE BODY INSPECTION [SKYACTIV-G 2.5].)

• Is there any malfunction?

Yes

Inspect the throttle valve actuator related circuits and connectors.

• If there is any malfunction:

• Repair or replace the malfunctioning part according to the inspection results.

• If there is no malfunction:

• Replace the throttle body.

  (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

Go to the next step.

No

Go to the next step.

10

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Perform the KOEO self test.

  (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5].)

Go to the next step.

No

Go to the next step.

11

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [SKYACTIV-G 2.5].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SKYACTIV-G 2.5].)

No

DTC troubleshooting completed.