DTC P0C2A:00 [TCM (SJ6A-EL)]

id0502o1832500

DTC P0C2A:00	Electric AT oil pump: Electric AT oil pump driver control unit lock/spin malfunction
DETECTION CONDITION	•  Vehicle condition: During i-stop •  Status: Electric AT oil pump driver control unit detects internal malfunction •  Period: Confirmed 2 times continuously in 0.5 s or more (only 1 time detected during i-stop for 1 time)
FAIL-SAFE FUNCTION	•  Inhibits the i-stop control.
POSSIBLE CAUSE	•  Short to ground in wiring harness between electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Short to ground in wiring harness between electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Short to ground in wiring harness between electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B •  Short to power supply in wiring harness between electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Short to power supply in wiring harness between electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Short to power supply in wiring harness between electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B •  Open circuit in wiring harness between electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Open circuit in wiring harness between electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Open circuit in wiring harness between electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B •  Connector or terminal malfunction •  Electric AT oil pump driver control unit malfunction •  Electric AT oil pump malfunction •  TCM malfunction

Diagnostic Procedure

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION Note •  Recording can be facilitated using the screen capture function of the PC. •  Record the freeze frame data/snap shot data.	—	Go to the next step.
2	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	INSPECT FOR SHORT TO GROUND IN ELECTRIC AT OIL PUMP CIRCUIT •  Disconnect the TCM connector. •  Inspect for continuity between the following terminals (vehicle wiring harness side) and body ground. ―  Electric AT oil pump terminal A ―  Electric AT oil pump terminal B ―  Electric AT oil pump terminal C •  Is there continuity?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. •  Electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to ground to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to ground. Go to Step 10.
		No	Go to the next step.
4	INSPECT FOR SHORT TO POWER SUPPLY IN ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT CIRCUIT •  Connect the TCM connector. •  Start the engine. •  Measure the voltage between the following terminals (vehicle wiring harness side) and body ground before/after operating i-stop. ―  Electric AT oil pump terminal A ―  Electric AT oil pump terminal B ―  Electric AT oil pump terminal C •  Is the voltage B+ constantly?	Yes	Refer to the wiring diagram and verify if there is a common connector between the following terminals. •  Electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for short to power supply to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which is shorted to the power supply. Go to Step 10.
		No	Go to the next step.
5	INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT FOR OPEN CIRCUIT •  Disconnect the TCM connector. •  Disconnect the electric AT oil pump driver control unit connector. •  Inspect the wiring harness for continuity between the following terminals (vehicle wiring harness side). ―  Electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D ―  Electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F ―  Electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify if there is a common connector between the following terminals. •  Electric AT oil pump terminal A and electric AT oil pump driver control unit terminal D •  Electric AT oil pump terminal B and electric AT oil pump driver control unit terminal F •  Electric AT oil pump terminal C and electric AT oil pump driver control unit terminal B If there is a common connector: •  Inspect the common connector and terminals for corrosion, damage, or disconnection and the common wiring harnesses for an open circuit to determine the malfunctioning location. •  Repair or replace the malfunctioning location. If there is no common connector: •  Repair or replace the wiring harness which has an open circuit. Go to Step 10.
6	INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT CONNECTOR •  Switch the ignition off. •  Disconnect the electric AT oil pump driver control unit connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is there any malfunctioning location?	Yes	Repair or replace the connector/terminal, then go to Step 10.
		No	Go to the next step.
7	INSPECT ELECTRIC AT OIL PUMP CONNECTOR •  Switch the ignition off. •  Disconnect the electric AT oil pump connector. •  Inspect the connector engagement and connection condition, and inspect the terminals for damage, deformation, corrosion, or disconnection. •  Is there any malfunctioning location?	Yes	Repair or replace the connector/terminal, then go to Step 10.
		No	Go to the next step.
8	INSPECT ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT •  Inspect the electric AT oil pump driver control unit. (See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT INSPECTION [SJ6A-EL].) •  Is the electric AT oil pump driver control unit normal?	Yes	Go to the next step.
		No	Replace the electric AT oil pump driver control unit, then go to Step 10. (See ELECTRIC AT OIL PUMP DRIVER CONTROL UNIT REMOVAL/INSTALLATION [SJ6A-EL].)
9	INSPECT ELECTRIC AT OIL PUMP •  Start the engine and operate i-stop. •  Verify the electric AT oil pump operation sound. •  Can the operation sound be heard?	Yes	Go to the next step.
		No	Replace the electric AT oil pump, then go to the next step. (See ELECTRIC AT OIL PUMP REMOVAL/INSTALLATION [SJ6A-EL].)
10	VERIFY SAME DTC IS NOT PRESENT •  Clear DTC for the TCM using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) •  Perform the DTC inspection for the TCM using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) •  Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION [SJ6A-EL].)
		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED •  Clear the DTC using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) •  Perform the DTC inspection using the M-MDS. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].) •  Are any DTCs present?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)
		No	DTC troubleshooting completed.