DTC P181F:00 [EW6A-EL]

id050234960600

DTC P181F:00

Electric AT oil pump/Electric AT oil pump relay circuit malfunction

DETECTION CONDITION

•  If the TCM detects any of the following conditions for a continuous 5 s:

―  Electric AT oil pump circuit has a malfunction.

―  Electric AT oil pump relay circuit has a malfunction.

FAIL-SAFE FUNCTION

•  Inhibits i-stop control.

POSSIBLE CAUSE

•  AT PUMP 15 A fuse malfunction

•  Electric AT oil pump relay malfunction

•  Electric AT oil pump connector or terminals malfunction

•  TCM connector or terminals malfunction

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

―  Electric AT oil pump relay terminal A—Electric AT oil pump relay terminal C

―  Electric AT oil pump relay terminal D—Electric AT oil pump terminal D

―  Electric AT oil pump relay terminal E—TCM terminal K

―  Electric AT oil pump terminal C—TCM terminal L

•  Open circuit in wiring harness between the following terminals:

―  Electric AT oil pump relay terminal A—Electric AT oil pump relay terminal C

―  Electric AT oil pump relay terminal D—Electric AT oil pump terminal D

―  Electric AT oil pump relay terminal E—TCM terminal K

―  Electric AT oil pump terminal C—TCM terminal L

•  Electric AT oil pump malfunction

•  Open circuit in wiring harness between electric AT oil pump terminal A and body ground

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

―  Electric AT oil pump relay terminal E—TCM terminal K

―  Electric AT oil pump terminal C—TCM terminal L

•  TCM malfunction

DTC P181F:00	Electric AT oil pump/Electric AT oil pump relay circuit malfunction
DETECTION CONDITION	• If the TCM detects any of the following conditions for a continuous 5 s: ― Electric AT oil pump circuit has a malfunction. ― Electric AT oil pump relay circuit has a malfunction.
FAIL-SAFE FUNCTION	• Inhibits i-stop control.
POSSIBLE CAUSE	• AT PUMP 15 A fuse malfunction • Electric AT oil pump relay malfunction • Electric AT oil pump connector or terminals malfunction • TCM connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Electric AT oil pump relay terminal A—Electric AT oil pump relay terminal C ― Electric AT oil pump relay terminal D—Electric AT oil pump terminal D ― Electric AT oil pump relay terminal E—TCM terminal K ― Electric AT oil pump terminal C—TCM terminal L • Open circuit in wiring harness between the following terminals: ― Electric AT oil pump relay terminal A—Electric AT oil pump relay terminal C ― Electric AT oil pump relay terminal D—Electric AT oil pump terminal D ― Electric AT oil pump relay terminal E—TCM terminal K ― Electric AT oil pump terminal C—TCM terminal L • Electric AT oil pump malfunction • Open circuit in wiring harness between electric AT oil pump terminal A and body ground • Short to ground in wiring harness between the following terminals: ― Electric AT oil pump relay terminal E—TCM terminal K ― Electric AT oil pump terminal C—TCM terminal L • TCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	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.
1		No	Go to the next step.
2	INSPECT AT PUMP 15 A FUSE • Switch the ignition off. • Is the fuse blown?	Yes	Go to Step 6.
2		No	Go to the next step.
3	INSPECT ELECTRIC AT OIL PUMP RELAY • 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, then go to Step 10. (See RELAY LOCATION.)
3		No	Go to the next step.
4	INSPECT ELECTRIC AT OIL PUMP RELAY POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Measure the voltage at the following terminals (wiring harness-side): ― Electric AT oil pump relay terminal A ― Electric AT oil pump relay terminal C • Is the voltage 0 V?	Yes	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 C. 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 11.
4		No	Go to the next step.
5	INSPECT TCM AND ELECTRIC AT OIL PUMP CONNECTOR • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) • Disconnect the following connectors. ― TCM ― Electric AT oil pump • Visually inspect the engagement and connection condition of the connector, and terminals for damage, deformation, corrosion, or disconnection. • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 11.
5		No	Go to the next step.
6	INSPECT ELECTRIC AT OIL PUMP RELAY CIRCUIT AND ELECTRIC AT OIL PUMP CIRCUIT FOR SHORT TO GROUND • Verify that the electric AT oil pump relay, 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 A—Electric AT oil pump relay terminal C ― Electric AT oil pump relay terminal D—Electric AT oil pump terminal D ― Electric AT oil pump relay terminal E—TCM terminal K ― Electric AT oil pump terminal C—TCM terminal L • 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 A—Electric AT oil pump relay terminal C • Electric AT oil pump relay terminal D—Electric AT oil pump terminal D • Electric AT oil pump relay terminal E—TCM terminal K • Electric AT oil pump terminal C—TCM terminal L 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 11.
6		No	Go to the next step.
7	INSPECT ELECTRIC AT OIL PUMP RELAY CIRCUIT AND ELECTRIC AT OIL PUMP CIRCUIT FOR OPEN CIRCUIT • Verify that the electric AT oil pump relay, 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 A—Electric AT oil pump relay terminal C ― Electric AT oil pump relay terminal D—Electric AT oil pump terminal D ― Electric AT oil pump relay terminal E—TCM terminal K ― Electric AT oil pump terminal C—TCM terminal L • Is there continuity?	Yes	Go to the next step.
7		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 A—Electric AT oil pump relay terminal C • Electric AT oil pump relay terminal D—Electric AT oil pump terminal D • Electric AT oil pump relay terminal E—TCM terminal K • Electric AT oil pump terminal C—TCM terminal L 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 11.
8	INSPECT ELECTRIC AT OIL PUMP • Remove the electric AT oil pump. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [EW6A-EL].) • Verify that the resistance according to the following: ― Between electric AT oil pump terminal D and A: Approx. 18.2 Kilohms ― Between electric AT oil pump terminal C and A: Approx. 21.5 Kilohms • Is the resistance normal?	Yes	Install the electric AT oil pump, then go to the next step. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [EW6A-EL].)
8		No	Replace the electric AT oil pump, then go to Step 11. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [EW6A-EL].)
9	INSPECT ELECTRIC AT OIL PUMP GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the electric AT oil pump relay, electric AT oil pump, and TCM connectors are disconnected. • Inspect for continuity between electric AT oil pump terminal A (wiring harness-side) and body ground. • Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between electric AT oil pump terminal A 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: • Repair or replace the wiring harness which has an open circuit. Go to Step 11.
10	INSPECT ELECTRIC AT OIL PUMP CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the electric AT oil pump relay, electric AT oil pump, and TCM connectors are disconnected. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) • Switch the ignition ON (engine on). • Measure the voltage at the following terminals (wiring harness-side): ― TCM terminal K ― TCM terminal L • Is the voltage 0 V?	Yes	Go to the next step.
10		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • TCM terminal K—Electric AT oil pump relay terminal E • TCM terminal L—Electric AT oil pump terminal C 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 power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED • Always reconnect all disconnected connectors. • Replace the fuse if it is blown. • Reconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].) • Clear the DTC using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [EW6A-EL].) • Perform the following procedure to ensure that the DTC has been resolved: 1. Operate i-stop for 10 s or more. • Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [EW6A-EL].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [EW6A-EL].)
11		No	DTC troubleshooting completed.