DTC P181F:00 [FW6A-EL]

id050225960600

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.

Diagnostic support note

•  The MIL does not illuminate.

•  The AT warning light does not illuminate.

•  PENDING CODE is available.

•  FREEZE FRAME DATA is not available.

•  The DTC is stored in the TCM memory.

FAIL-SAFE FUNCTION

•  Inhibits i-stop control.

POSSIBLE CAUSE

•  Electric AT oil pump relay malfunction

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

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

•  Electric AT oil pump connector or terminals malfunction

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

•  Short to ground or open circuit in wiring harness between battery positive terminal and electric AT oil pump terminal D

•  TCM connector or terminals malfunction

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

―  Electric AT oil pump relay terminal B—TCM terminal 1K

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

•  Short to power supply in wiring harness between electric AT oil pump terminal C and TCM terminal 1L

•  Open circuit in wiring harness between the following terminals:

―  Electric AT oil pump relay terminal B—TCM terminal 1K

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

•  Electric AT oil pump malfunction

•  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. Diagnostic support note • The MIL does not illuminate. • The AT warning light does not illuminate. • PENDING CODE is available. • FREEZE FRAME DATA is not available. • The DTC is stored in the TCM memory.
FAIL-SAFE FUNCTION	• Inhibits i-stop control.
POSSIBLE CAUSE	• Electric AT oil pump relay malfunction • Short to ground in wiring harness between electric AT oil pump relay terminal D and electric AT oil pump relay terminal C • Open circuit in wiring harness between electric AT oil pump relay terminal D and electric AT oil pump relay terminal C • Electric AT oil pump connector or terminals malfunction • Open circuit in wiring harness between electric AT oil pump terminal A and body ground • Short to ground or open circuit in wiring harness between battery positive terminal and electric AT oil pump terminal D • TCM connector or terminals malfunction • Short to ground in wiring harness between the following terminals: ― Electric AT oil pump relay terminal B—TCM terminal 1K ― Electric AT oil pump terminal C—TCM terminal 1L • Short to power supply in wiring harness between electric AT oil pump terminal C and TCM terminal 1L • Open circuit in wiring harness between the following terminals: ― Electric AT oil pump relay terminal B—TCM terminal 1K ― Electric AT oil pump terminal C—TCM terminal 1L • Electric AT oil pump malfunction • 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 ELECTRIC AT OIL PUMP RELAY • Switch the ignition to 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, then go to Step 13. (See RELAY LOCATION.)
2		No	Go to the next step.
3	INSPECT ELECTRIC AT OIL PUMP RELAY CIRCUIT FOR SHORT TO GROUND • Verify that the electric AT oil pump relay is removed. • Inspect for continuity between electric AT oil pump relay terminal D (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 13.
3		No	Go to the next step.
4	INSPECT ELECTRIC AT OIL PUMP RELAY CIRCUIT FOR OPEN CIRCUIT • Verify that the electric AT oil pump relay is removed. • Inspect for continuity between electric AT oil pump relay terminal D (wiring harness-side) and electric AT oil pump relay terminal C (wiring harness-side). • Is there continuity?	Yes	Install the electric AT oil pump relay, then go to the next step. (See RELAY LOCATION.)
4		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 13.
5	INSPECT ELECTRIC AT OIL PUMP CONNECTOR CONDITION • 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, then go to Step 13.
5		No	Go to the next step.
6	INSPECT ELECTRIC AT OIL PUMP GROUND CIRCUIT FOR OPEN CIRCUIT • Verify that the electric AT oil pump connector is 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.
6		No	Repair or replace the wiring harness for a possible open circuit, then go to Step 13.
7	INSPECT ELECTRIC AT OIL PUMP POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT • Verify that the electric AT oil pump connector is disconnected. • Switch the electric AT oil pump relay to ON using the simulation item EOP_RLY. (See ON-BOARD DIAGNOSTIC SYSTEM SIMULATION INSPECTION [FW6A-EL].) • Measure the voltage at the electric AT oil pump terminal D (wiring harness-side). • Is there any voltage?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to Step 13.
8	INSPECT TCM CONNECTOR CONDITION • Disconnect the TCM connector. • Visually inspect the TCM connector and terminals. • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 13.
8		No	Go to the next step.
9	INSPECT ELECTRIC AT OIL PUMP CIRCUIT FOR SHORT TO GROUND • 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 B ― Electric AT oil pump terminal C • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 13.
9		No	Go to the next step.
10	INSPECT ELECTRIC AT OIL PUMP CIRCUIT FOR SHORT TO POWER SUPPLY • Verify that the electric AT oil pump and TCM connectors are disconnected. • Switch the ignition to ON. • Measure the voltage at the electric AT oil pump terminal C (wiring harness-side). • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 13.
10		No	Go to the next step.
11	INSPECT ELECTRIC AT OIL PUMP CIRCUIT FOR OPEN CIRCUIT • Verify that the electric AT oil pump and TCM connectors are disconnected. • Switch the ignition to off. • Visually inspect the wiring harness between the following terminals (wiring harness-side): ― Electric AT oil pump relay terminal B—TCM terminal 1K ― Electric AT oil pump terminal C—TCM terminal 1L • Is there any malfunction?	Yes	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
11		No	Go to the next step.
12	INSPECT ELECTRIC AT OIL PUMP • Remove the electric AT oil pump. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [FW6A-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	Go to the next step.
12		No	Replace the electric AT oil pump, then go to the next step. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [FW6A-EL].)
13	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL].) • Perform the following procedure to ensure that the DTC has been resolved: 1. Operates the i-stop. • Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [FW6A-EL].) • Is the DTC P181F:00 present?	Yes	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [FW6A-EL].)
13		No	Go to the next step.
14	VERIFY NO DTC HAS BEEN PRESENTED • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [FW6A-EL].)
14	VERIFY NO DTC HAS BEEN PRESENTED • Are any DTCs present?	No	DTC troubleshooting completed.