NO.9 ACCELERATION MALFUNCTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0]

9	ACCELERATION MALFUNCTION
DESCRIPTION	• Acceleration from i-stop is not smooth. • Suppresses (shock) when accelerating vehicle from i-stop. • Engine vibration increases when engine is restarted.
POSSIBLE CAUSE	Note • MT vehicles are not included because the driver releases the brake pedal and depresses the clutch pedal to accelerate. AT system malfunction • Electric AT oil pump malfunction (operation malfunction, insufficient pressure) ― Electric AT oil pump relay malfunction (stuck open) ― Short to ground or open circuit in electric AT oil pump relay power supply circuit (without i-ELOOP) • Short to ground in wiring harness between MAIN 200 A fuse and electric AT oil pump relay terminal D • MAIN 200 A fuse and/or AT PUMP 15 A fuse malfunction • Open circuit in wiring harness between battery positive terminal and electric AT oil pump relay terminal D ― Short to ground or open circuit in electric AT oil pump relay power supply circuit (without i-ELOOP) • Short to ground in wiring harness between ENGINE3 15 A fuse and electric AT oil pump relay terminal A • ENGINE3 15 A fuse malfunction • Open circuit in wiring harness between main relay terminal C and electric AT oil pump relay terminal A ― Short to ground or open circuit in electric AT oil pump relay power supply circuit (with i-ELOOP) • Short to ground in wiring harness between AT PUMP 15 A fuse and electric AT oil pump relay terminal D • AT PUMP 15 A fuse malfunction • Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and electric AT oil pump relay terminal D ― Short to ground or open circuit in electric AT oil pump relay power supply circuit (with i-ELOOP) • Short to ground in wiring harness between ENGINE3 15 A fuse and electric AT oil pump relay terminal A • ENGINE3 15 A fuse malfunction • Open circuit in wiring harness between main relay terminal C and electric AT oil pump relay terminal A ― Electric AT oil pump connector or terminals malfunction ― Open circuit in wiring harness between electric AT oil pump terminal G and body ground ― Short to ground in wiring harness between electric AT oil pump relay terminal C and electric AT oil pump terminal D ― Open circuit in wiring harness between electric AT oil pump relay terminal C and electric AT oil pump terminal A ― TCM connector or terminals malfunction ― Short to ground in wiring harness between the following terminals: • Electric AT oil pump relay terminal E—TCM terminal 1Y • Electric AT oil pump terminal C—TCM terminal 1Z • Electric AT oil pump terminal E—TCM terminal 1AF ― Open circuit in wiring harness between the following terminals: • Electric AT oil pump relay terminal E—TCM terminal 1Y • Electric AT oil pump terminal C—TCM terminal 1Z • Electric AT oil pump terminal E—TCM terminal 1AF ― Electric AT oil pump malfunction ― TCM malfunction • AT malfunction Hill launch assist function system (DSC) malfunction • False detection of inclination angle (cannot calculate correct road slope) ― Low-G (XY) sensor (built-into SAS control module) malfunction (In this case, the SAS control module records DTCs C0061:29 and C0062:29.) ― Low-G (XY) sensor (built-into SAS control module) initialization malfunction (In this case, the SAS control module records DTC U2100:00.) • False detection of brake fluid pressure ― Brake fluid pressure sensor (built-into DSC HU/CM) malfunction • Cannot maintain brake fluid pressure ― DSC HU/CM malfunction

ACCELERATION MALFUNCTION

DESCRIPTION

• Acceleration from i-stop is not smooth.

• Suppresses (shock) when accelerating vehicle from i-stop.

• Engine vibration increases when engine is restarted.

POSSIBLE CAUSE

Note

• MT vehicles are not included because the driver releases the brake pedal and depresses the clutch pedal to accelerate.

AT system malfunction

• Electric AT oil pump malfunction (operation malfunction, insufficient pressure)

― Electric AT oil pump relay malfunction (stuck open)

― Short to ground or open circuit in electric AT oil pump relay power supply circuit (without i-ELOOP)

• Short to ground in wiring harness between MAIN 200 A fuse and electric AT oil pump relay terminal D

• MAIN 200 A fuse and/or AT PUMP 15 A fuse malfunction

• Open circuit in wiring harness between battery positive terminal and electric AT oil pump relay terminal D

― Short to ground or open circuit in electric AT oil pump relay power supply circuit (without i-ELOOP)

• Short to ground in wiring harness between ENGINE3 15 A fuse and electric AT oil pump relay terminal A

• ENGINE3 15 A fuse malfunction

• Open circuit in wiring harness between main relay terminal C and electric AT oil pump relay terminal A

― Short to ground or open circuit in electric AT oil pump relay power supply circuit (with i-ELOOP)

• Short to ground in wiring harness between AT PUMP 15 A fuse and electric AT oil pump relay terminal D

• AT PUMP 15 A fuse malfunction

• Open circuit in wiring harness between DC-DC converter (i-ELOOP) terminal 4A and electric AT oil pump relay terminal D

― Short to ground or open circuit in electric AT oil pump relay power supply circuit (with i-ELOOP)

• Short to ground in wiring harness between ENGINE3 15 A fuse and electric AT oil pump relay terminal A

• ENGINE3 15 A fuse malfunction

• Open circuit in wiring harness between main relay terminal C and electric AT oil pump relay terminal A

― Electric AT oil pump connector or terminals malfunction

― Open circuit in wiring harness between electric AT oil pump terminal G and body ground

― Short to ground in wiring harness between electric AT oil pump relay terminal C and electric AT oil pump terminal D

― Open circuit in wiring harness between electric AT oil pump relay terminal C and electric AT oil pump terminal A

― TCM connector or terminals malfunction

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

• Electric AT oil pump relay terminal E—TCM terminal 1Y

• Electric AT oil pump terminal C—TCM terminal 1Z

• Electric AT oil pump terminal E—TCM terminal 1AF

― Open circuit in wiring harness between the following terminals:

• Electric AT oil pump relay terminal E—TCM terminal 1Y

• Electric AT oil pump terminal C—TCM terminal 1Z

• Electric AT oil pump terminal E—TCM terminal 1AF

― Electric AT oil pump malfunction

― TCM malfunction

• AT malfunction

Hill launch assist function system (DSC) malfunction

• False detection of inclination angle (cannot calculate correct road slope)

― Low-G (XY) sensor (built-into SAS control module) malfunction (In this case, the SAS control module records DTCs C0061:29 and C0062:29.)

― Low-G (XY) sensor (built-into SAS control module) initialization malfunction (In this case, the SAS control module records DTC U2100:00.)

• False detection of brake fluid pressure

― Brake fluid pressure sensor (built-into DSC HU/CM) malfunction

• Cannot maintain brake fluid pressure

― DSC HU/CM malfunction

STEP	INSPECTION	RESULTS	ACTION
1	DETERMINE IF MALFUNCTION CAUSED BY AT BODY • Compare the malfunction symptom with the i-stop system stop condition. • Is there any shock or slippage during acceleration with the i-stop system disabled?	Yes	Perform the applicable symptom troubleshooting procedure. (See SYMPTOM TROUBLESHOOTING ITEM TABLE [SJ6A-EL].)
No	Go to the next step.
2	VERIFY DTC • Retrieve the PCM, TCM, DSC HU/CM, SAS control module DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) (See DTC INSPECTION [DSC HU/CM].) (See DTC INSPECTION [SAS CONTROL MODULE (AIR BAG SYSTEM)].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].) (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].) (See DTC TABLE [DSC HU/CM].) (See DTC TABLE [SAS CONTROL MODULE (AIR BAG SYSTEM)].)
No	Go to the next step.
3	DETERMINE IF MALFUNCTION CAUSE IS BRAKE FLUID PRESSURE SENSOR SIGNAL OR OTHER • Put the vehicle in an i-stop condition (engine stopped). • Monitor the PCM PID BFP using the M-MDS while the brake is depressed and held with the i-stop function operating. (See PID/DATA MONITOR INSPECTION (i-stop) [SKYACTIV-G 1.5, SKYACTIV-G 2.0].) • Does the monitoring value change?	Yes	Brake fluid pressure sensor (built-into DSC HU/CM) or DSC HU/CM brake pressure hold function malfunction. • Replace the DSC HU/CM. (See DSC HU/CM REMOVAL/INSTALLATION [L.H.D.].) (See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)
No	Go to the next step.
4	INSPECT ELECTRIC AT OIL PUMP RELAY • Switch the ignition off. • Remove the electric AT oil pump relay. (See RELAY LOCATION.) • Inspect the electric AT oil pump relay. (See RELAY INSPECTION.) • Is there any malfunction?	Yes	Replace the electric AT oil pump relay.
No	Vehicles with i-ELOOP: • Go to Step 7. Vehicles without i-ELOOP: • Go to the next step.
5	INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Measure the voltage at the electric AT oil pump relay terminal D (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
No	Inspect the MAIN 200 A fuse and AT PUMP 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and electric AT oil pump relay terminal D. 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. • If all fuses are normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and electric AT oil pump relay terminal D. 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.
6	INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Switch the ignition ON (engine off). • Measure the voltage at the electric AT oil pump relay terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to Step 9.
No	Inspect the ENGINE3 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and electric AT oil pump 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 the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal C and electric AT oil pump 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.
7	INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Measure the voltage at the electric AT oil pump relay terminal D (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
No	Remove the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].) Inspect the AT PUMP 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between AT PUMP 15 A fuse and electric AT oil pump relay terminal D. If there is a common connector: • Determine the malfunctioning location by inspecting the common connector and terminals for corrosion, damage, or disconnection and by inspecting the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness for short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which is shorted to ground, or the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter (i-ELOOP) terminal 4A and electric AT oil pump relay terminal D. If there is a common connector: • Determine the malfunctioning location by inspecting the common connector and terminals for corrosion, damage, or disconnection and by inspecting the DC-DC converter (i-ELOOP) terminal 4A-related 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, or the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness. Reinstall the service plug. (See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].)
8	INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Switch the ignition ON (engine off). • Measure the voltage at the electric AT oil pump relay terminal A (wiring harness-side). • Is the voltage B+?	Yes	Go to the next step.
No	Inspect the ENGINE3 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and electric AT oil pump 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 the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal C and electric AT oil pump 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.
9	INSPECT ELECTRIC AT OIL PUMP CONNECTOR CONDITION • Switch the ignition off. • Disconnect the electric AT oil pump 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.
No	Go to the next step.
10	INSPECT ELECTRIC AT OIL PUMP GROUND CIRCUIT FOR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Verify that the electric AT oil pump connector is disconnected. • Inspect for continuity between electric AT oil pump terminal G (wiring harness-side) and body ground. • 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 electric AT oil pump terminal G and body ground. 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: • Inspect for the following: ― Open circuit between electric AT oil pump and body ground ― Loose or lifting ground point • Repair or replace the malfunctioning part.
11	INSPECT ELECTRIC AT OIL PUMP POWER SUPPLY CIRCUIT FOR SHORT TO GROUND • Electric AT oil pump relay is removed. • Verify that the electric AT oil pump connector is disconnected. • Inspect for continuity between electric AT oil pump relay terminal C (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 electric AT oil pump relay terminal C and electric AT oil pump 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.
No	Go to the next step.
12	INSPECT ELECTRIC AT OIL PUMP POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Verify that the electric AT oil pump connector is disconnected. • Inspect for continuity between electric AT oil pump relay terminal C (wiring harness-side) and electric AT oil pump terminal A (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 electric AT oil pump relay terminal C and electric AT oil pump 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.
13	INSPECT TCM CONNECTOR CONDITION • Disconnect the TCM 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.
No	Go to the next step.
14	INSPECT TCM CIRCUIT FOR SHORT TO GROUND • Electric AT oil pump relay is removed. • Verify that the electric AT oil pump and TCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Electric AT oil pump relay terminal E ― Electric AT oil pump terminal C ― Electric AT oil pump terminal E • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Electric AT oil pump relay terminal E—TCM terminal 1Y • Electric AT oil pump terminal C—TCM terminal 1Z • Electric AT oil pump terminal E—TCM terminal 1AF 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.
No	Go to the next step.
15	INSPECT TCM CIRCUIT FOR OPEN CIRCUIT • Electric AT oil pump relay is removed. • Verify that the electric AT oil pump and TCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Electric AT oil pump relay terminal E—TCM terminal 1Y ― Electric AT oil pump terminal C—TCM terminal 1Z ― Electric AT oil pump terminal E—TCM terminal 1AF • Is there continuity?	Yes	Replace the electric AT oil pump. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [SJ6A-EL].)
No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Electric AT oil pump relay terminal E—TCM terminal 1Y • Electric AT oil pump terminal C—TCM terminal 1Z • Electric AT oil pump terminal E—TCM terminal 1AF 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.
16	Verify the test results. • If normal, return to the diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 1.5, SKYACTIV-G 2.0].) • If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis. ― If the vehicle is repaired, troubleshooting is completed. ― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

STEP

INSPECTION

RESULTS

ACTION

DETERMINE IF MALFUNCTION CAUSED BY AT BODY

• Compare the malfunction symptom with the i-stop system stop condition.

• Is there any shock or slippage during acceleration with the i-stop system disabled?

Yes

Perform the applicable symptom troubleshooting procedure.

(See SYMPTOM TROUBLESHOOTING ITEM TABLE [SJ6A-EL].)

Go to the next step.

VERIFY DTC

• Retrieve the PCM, TCM, DSC HU/CM, SAS control module DTCs using the M-MDS.

(See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)

(See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

(See DTC INSPECTION [DSC HU/CM].)

(See DTC INSPECTION [SAS CONTROL MODULE (AIR BAG SYSTEM)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].)

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

(See DTC TABLE [DSC HU/CM].)

(See DTC TABLE [SAS CONTROL MODULE (AIR BAG SYSTEM)].)

Go to the next step.

DETERMINE IF MALFUNCTION CAUSE IS BRAKE FLUID PRESSURE SENSOR SIGNAL OR OTHER

• Put the vehicle in an i-stop condition (engine stopped).

• Monitor the PCM PID BFP using the M-MDS while the brake is depressed and held with the i-stop function operating.

(See PID/DATA MONITOR INSPECTION (i-stop) [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

• Does the monitoring value change?

Yes

Brake fluid pressure sensor (built-into DSC HU/CM) or DSC HU/CM brake pressure hold function malfunction.

• Replace the DSC HU/CM.

(See DSC HU/CM REMOVAL/INSTALLATION [L.H.D.].)

(See DSC HU/CM REMOVAL/INSTALLATION [R.H.D.].)

Go to the next step.

INSPECT ELECTRIC AT OIL PUMP RELAY

• Switch the ignition off.

• Remove the electric AT oil pump relay.

(See RELAY LOCATION.)

• Inspect the electric AT oil pump relay.

(See RELAY INSPECTION.)

• Is there any malfunction?

Yes

Replace the electric AT oil pump relay.

Vehicles with i-ELOOP:

• Go to Step 7.

Vehicles without i-ELOOP:

• Go to the next step.

INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Measure the voltage at the electric AT oil pump relay terminal D (wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

Inspect the MAIN 200 A fuse and AT PUMP 15 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between MAIN 200 A fuse and electric AT oil pump relay terminal D.

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.

• If all fuses are normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between battery positive terminal and electric AT oil pump relay terminal D.

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.

INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Switch the ignition ON (engine off).

• Measure the voltage at the electric AT oil pump relay terminal A (wiring harness-side).

• Is the voltage B+?

Yes

Go to Step 9.

Inspect the ENGINE3 15 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and electric AT oil pump 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 the fuse is normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal C and electric AT oil pump 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.

INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Measure the voltage at the electric AT oil pump relay terminal D (wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

Remove the service plug.

(See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].)

Inspect the AT PUMP 15 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between AT PUMP 15 A fuse and electric AT oil pump relay terminal D.

If there is a common connector:

• Determine the malfunctioning location by inspecting the common connector and terminals for corrosion, damage, or disconnection and by inspecting the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness for short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which is shorted to ground, or the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness.

• Replace the fuse.

• If the fuse is damaged:

― Replace the fuse.

• If the fuse is normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between DC-DC converter (i-ELOOP) terminal 4A and electric AT oil pump relay terminal D.

If there is a common connector:

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit, or the DC-DC converter (i-ELOOP) terminal 4A-related wiring harness.

Reinstall the service plug.

(See SERVICE PLUG DISCONNECTION/CONNECTION [i-ELOOP].)

INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Switch the ignition ON (engine off).

• Measure the voltage at the electric AT oil pump relay terminal A (wiring harness-side).

• Is the voltage B+?

Yes

Go to the next step.

Inspect the ENGINE3 15 A fuse.

• If the fuse is blown:

― Refer to the wiring diagram and verify whether or not there is a common connector between ENGINE3 15 A fuse and electric AT oil pump 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 the fuse is normal:

― Refer to the wiring diagram and verify whether or not there is a common connector between main relay terminal C and electric AT oil pump 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.

INSPECT ELECTRIC AT OIL PUMP CONNECTOR CONDITION

• Switch the ignition off.

• Disconnect the electric AT oil pump 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.

Go to the next step.

INSPECT ELECTRIC AT OIL PUMP GROUND CIRCUIT FOR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Verify that the electric AT oil pump connector is disconnected.

• Inspect for continuity between electric AT oil pump terminal G (wiring harness-side) and body ground.

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between electric AT oil pump terminal G and body ground.

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:

• Inspect for the following:

― Open circuit between electric AT oil pump and body ground

― Loose or lifting ground point

• Repair or replace the malfunctioning part.

INSPECT ELECTRIC AT OIL PUMP POWER SUPPLY CIRCUIT FOR SHORT TO GROUND

• Electric AT oil pump relay is removed.

• Verify that the electric AT oil pump connector is disconnected.

• Inspect for continuity between electric AT oil pump relay terminal C (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 electric AT oil pump relay terminal C and electric AT oil pump 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.

Go to the next step.

INSPECT ELECTRIC AT OIL PUMP POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Verify that the electric AT oil pump connector is disconnected.

• Inspect for continuity between electric AT oil pump relay terminal C (wiring harness-side) and electric AT oil pump terminal A (wiring harness-side).

• Is there continuity?

Yes

Go to the next step.

Refer to the wiring diagram and verify whether or not there is a common connector between electric AT oil pump relay terminal C and electric AT oil pump 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.

INSPECT TCM CONNECTOR CONDITION

• Disconnect the TCM 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.

Go to the next step.

INSPECT TCM CIRCUIT FOR SHORT TO GROUND

• Electric AT oil pump relay is removed.

• Verify that the electric AT oil pump and TCM connectors are disconnected.

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

― Electric AT oil pump relay terminal E

― Electric AT oil pump terminal C

― Electric AT oil pump terminal E

• Is there continuity?

Yes

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

• Electric AT oil pump relay terminal E—TCM terminal 1Y

• Electric AT oil pump terminal C—TCM terminal 1Z

• Electric AT oil pump terminal E—TCM terminal 1AF

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.

INSPECT TCM CIRCUIT FOR OPEN CIRCUIT

• Electric AT oil pump relay is removed.

• Verify that the electric AT oil pump and TCM connectors are disconnected.

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

― Electric AT oil pump relay terminal E—TCM terminal 1Y

― Electric AT oil pump terminal C—TCM terminal 1Z

― Electric AT oil pump terminal E—TCM terminal 1AF

• Is there continuity?

Yes

Replace the electric AT oil pump.

(See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [SJ6A-EL].)

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

• Electric AT oil pump relay terminal E—TCM terminal 1Y

• Electric AT oil pump terminal C—TCM terminal 1Z

• Electric AT oil pump terminal E—TCM terminal 1AF

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.

Verify the test results.

• If normal, return to the diagnostic index to service any additional symptoms.

(See SYMPTOM DIAGNOSTIC INDEX [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

• If a malfunction remains, inspect the related Service Information and perform the repair or diagnosis.

― If the vehicle is repaired, troubleshooting is completed.

― If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)