STOP AND START SYSTEM, Diagnostic DTC:P0C2B15

DTC Code	DTC Name
P0C2B15	Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open

DESCRIPTION

Refer to DTC P0C2B11.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Memory	Note
P0C2B15	Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open	Both of the following conditions are met for 1 second or more (2 trip detection logic): Engine started Oil pump assembly with motor circuit malfunction (Oil pump motor relay in the engine stop and start ECU stuck off, open or short to ground in the OPO, OPM1 or NOPM circuit or an open in the GND circuit)	Wire harness or connector for 8AR-FTS: Oil pump assembly with motor (Automatic transaxle assembly) for 3ZR-FAE: Oil pump assembly with motor (Continuously variable transaxle assembly) Engine stop and start ECU	Blinks	DTC stored	SAE Code: P0C2E

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

Note

P0C2B15

Auxiliary Transmission Fluid Pump Control Module Feedback Signal Circuit Short to Battery or Open

Both of the following conditions are met for 1 second or more (2 trip detection logic):

Engine started
Oil pump assembly with motor circuit malfunction (Oil pump motor relay in the engine stop and start ECU stuck off, open or short to ground in the OPO, OPM1 or NOPM circuit or an open in the GND circuit)

Wire harness or connector
for 8AR-FTS:

Oil pump assembly with motor (Automatic transaxle assembly)
for 3ZR-FAE:

Oil pump assembly with motor (Continuously variable transaxle assembly)
Engine stop and start ECU

Blinks

DTC stored

SAE Code: P0C2E

CONFIRMATION DRIVING PATTERN

Tech Tips
- If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.
  
  In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item Status of Battery Charge Control changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)
- If the GTS is not available and the Data List item Status of Battery Charge Control cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
  
  If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
- After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
- Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
CONFIRMATION AFTER TROUBLESHOOTING
1. Connect the GTS to the DLC3.
2. Turn the engine switch on (IG)
3. Turn the GTS on.
4. Clear the DTCs.
  
  Powertrain > Stop and Start > Clear DTCs
5. Start the engine and warm it up.
6. Drive the vehicle at 7 km/h (4.3 mph) or more.
  
  CAUTION:
  
  When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
7. Depress the brake pedal and stop the vehicle.
8. Keep the engine stopped by stop and start control. (Keep the shift lever in D.)
9. Release the brake pedal with the shift lever in D to start the engine.
10. Check that no DTCs are output.
  
  Powertrain > Stop and Start > Trouble Codes
Tech Tips
- If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.
  
  In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item Status of Battery Charge Control changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)
- If the GTS is not available and the Data List item Status of Battery Charge Control cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.
  
  If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.
- After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
STOP AND START SYSTEM OPERATION CHECK
1. Start the engine and warm it up.
2. Turn the air conditioning system off.
3. Drive the vehicle at 7 km/h (4.3 mph) or more.
  
  CAUTION:
  
  When performing Confirmation Driving Pattern, obey all speed limits and traffic laws.
4. Depress the brake pedal and stop the vehicle.
5. Allow the engine to stop by stop and start control. (Keep the shift lever in D.)
6. Release the brake pedal with the shift lever in D to start the engine.

WIRING DIAGRAM

Refer to DTC P0C2B11.

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CAUTION / NOTICE / HINT

Note

for 8AR-FTS:

Before replacing the engine stop and start ECU, read the number of starter operations and write it into a new engine stop and start ECU.

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for 3ZR-FAE:

When replacing the engine stop and start ECU with a new one, make sure to download the previous status (number of starter operations) of the old engine stop and start ECU. After replacing the engine stop and start ECU, turn the engine switch on (IG) and wait 20 seconds, then confirm that "OK" is displayed for the Data List item "Stop&Start Operating Permission (Discharged Oil Pump Air)". Then upload the previous status (number of starter operations) to the engine stop and start ECU.

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After replacing the engine stop and start ECU or air conditioning amplifier assembly, reset and perform learning of the air conditioning information in the engine stop and start ECU.

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After replacing the engine stop and start ECU or airbag ECU assembly, clear and calibrate the deceleration sensor zero point in the engine stop and start ECU.

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for 8AR-FTS:

Bleed the oil pump assembly with motor (automatic transaxle assembly) after removing and installing the automatic transaxle assembly or replacing the automatic transaxle fluid.

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for 3ZR-FAE:

Bleed the oil pump assembly with motor (continuously variable transaxle assembly) after removing and installing the continuously variable transaxle assembly or replacing the CVT fluid.

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Tech Tips

Using the GTS, read the freeze frame data before troubleshooting. System condition information is recorded as freeze frame data the moment a DTC is stored. This information can be useful when troubleshooting.

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DTCs for the stop and start system are not cleared even if the malfunction has been repaired. After repairing the malfunction, be sure to clear the DTCs.

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PROCEDURE

PERFORM ACTIVE TEST USING GTS (OIL PUMP)

Drive the vehicle to warm up the engine and automatic transaxle*1 or CVT*2 fluid.

Tech Tips

The oil pump assembly with motor (automatic transaxle assembly*1, continuously variable transaxle assembly*2) may not operate properly if the automatic transaxle*1 or CVT*2 fluid temperature is low. Make sure to warm up the automatic transaxle*1 or CVT*2 fluid before performing the Active Test. (Automatic transaxle fluid temperature: 25°C (77°F) or higher*1, CVT fluid temperature: 30°C (86°F) or higher*2)
- *1: for 8AR-FTS
- *2: for 3ZR-FAE
Connect the GTS to the DLC3.
Turn the engine switch on (IG).

Tech Tips

Do not start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.

Powertrain > Stop and Start > Active Test

Tester Display

Oil Pump

Tester Display
Oil Pump

Check the operating sound of the oil pump assembly with motor (automatic transaxle assembly*1 or continuously variable transaxle assembly*2) while performing the Active Test.

*1: for 8AR-FTS
*2: for 3ZR-FAE

Standard

Oil Pump	Result
ON	Operating sound can be heard
OFF	Operating sound cannot be heard

Result

Proceed to
OK
NG

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP ASSEMBLY WITH MOTOR) Click here

CHECK ENGINE STOP AND START ECU (NOPM TERMINAL WAVEFORM)

Connect an oscilloscope to terminals A38-27 (NOPM) and A38-6 (DGND).

*a
Component with harness connected

(Engine Stop and Start ECU)
- -
Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.

Powertrain > Stop and Start > Active Test

Tester Display

Oil Pump

Tester Display
Oil Pump


*a	5 V/DIV.
*b	5 ms./DIV.

Check the waveform while performing the Active Test.

Item	Condition
Tester Connection	A38-27 (NOPM) - A38-6 (DGND)
Tool Setting	5 V/DIV., 5 ms./DIV.
Condition	Engine switch on (IG) (engine is stopped) Active Test "Oil Pump" being performed

Standard
The waveform is similar to that shown in the illustration with no noise.

Result

Proceed to
OK
NG

REPLACE ENGINE STOP AND START ECU Click here

CHECK OIL PUMP ASSEMBLY WITH MOTOR (OPST TERMINAL VOLTAGE)

*A	for 8AR-FTS
*B	for 3ZR-FAE
*a	Front view of wire harness connector (to Oil Pump Assembly with Motor (Automatic Transaxle Assembly))
*b	Front view of wire harness connector (to Oil Pump Assembly with Motor (Continuously Variable Transaxle Assembly))

for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

Turn the engine switch on (IG).

Measure the voltage according to the value(s) in the table below.

Standard Voltage

for 8AR-FTS:
Tester Connection	Condition	Specified Condition
C19-2 (OPST) - C19-1 (GND)	Engine switch on (IG)	10 to 14 V

for 3ZR-FAE:
Tester Connection	Condition	Specified Condition
C64-2 (OPST) - C64-1 (GND)	Engine switch on (IG)	10 to 14 V

Result

Proceed to
OK (for 8AR-FTS)
OK (for 3ZR-FAE)
NG

OK (for 8AR-FTS)

REPLACE AUTOMATIC TRANSAXLE ASSEMBLY for U661E: Click here for U661F: Click here

OK (for 3ZR-FAE)

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY for K114: Click here for K114F: Click here

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP ASSEMBLY WITH MOTOR)

Disconnect the A38 engine stop and start ECU connector.
for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 8AR-FTS:
Tester Connection	Condition	Specified Condition
A38-27 (NOPM) - C19-2 (OPST)	Always	Below 1 Ω
A38-27 (NOPM) - Body ground	Always	10 kΩ or higher
C19-2 (OPST) - Body ground	Always	10 kΩ or higher

for 3ZR-FAE:
Tester Connection	Condition	Specified Condition
A38-27 (NOPM) - C64-2 (OPST)	Always	Below 1 Ω
A38-27 (NOPM) - Body ground	Always	10 kΩ or higher
C64-2 (OPST) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPLACE ENGINE STOP AND START ECU Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP ASSEMBLY WITH MOTOR)

Disconnect the A73 engine stop and start ECU connector.
for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 8AR-FTS:
Tester Connection	Condition	Specified Condition
A73-6 (OP21) - C19-4 (+B)	Always	Below 1 Ω
A73-6 (OP21) - Body ground	Always	10 kΩ or higher
C19-4 (+B) - Body ground	Always	10 kΩ or higher

for 3ZR-FAE:
Tester Connection	Condition	Specified Condition
A73-6 (OP21) - C64-4 (+B)	Always	Below 1 Ω
A73-6 (OP21) - Body ground	Always	10 kΩ or higher
C64-4 (+B) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (OIL PUMP ASSEMBLY WITH MOTOR - BODY GROUND)

for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 8AR-FTS:
Tester Connection	Condition	Specified Condition
C19-1 (GND) - Body ground	Always	Below 1 Ω

for 3ZR-FAE:
Tester Connection	Condition	Specified Condition
C64-1 (GND) - Body ground	Always	Below 1 Ω

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENGINE STOP AND START ECU (OP21 TERMINAL VOLTAGE)

for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

*a
Component with harness connected

(Engine Stop and Start ECU)
- -
Connect the GTS to the DLC3.
Turn the engine switch on (IG).

Tech Tips

Do not start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.

Powertrain > Stop and Start > Active Test

Tester Display

Oil Pump

Tester Display
Oil Pump

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
A73-6 (OP21) - A38-6 (DGND)	Engine switch on (IG) (engine is stopped) Active Test "Oil Pump" being performed	10.5 to 16 V

Result

Proceed to
OK
NG

REPLACE ENGINE STOP AND START ECU Click here

CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - OIL PUMP ASSEMBLY WITH MOTOR)

Disconnect the A38 engine stop and start ECU connector.
for 8AR-FTS:

Disconnect the C19 oil pump assembly with motor (automatic transaxle assembly) connector.

for 3ZR-FAE:

Disconnect the C64 oil pump assembly with motor (continuously variable transaxle assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 8AR-FTS:
Tester Connection	Condition	Specified Condition
A38-9 (OPM1) - C19-3 (SI)	Always	Below 1 Ω
A38-9 (OPM1) - Body ground	Always	10 kΩ or higher
C19-3 (SI) - Body ground	Always	10 kΩ or higher

for 3ZR-FAE:
Tester Connection	Condition	Specified Condition
A38-9 (OPM1) - C64-3 (SI)	Always	Below 1 Ω
A38-9 (OPM1) - Body ground	Always	10 kΩ or higher
C64-3 (SI) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK OIL PUMP ASSEMBLY WITH MOTOR (OPM1 TERMINAL WAVEFORM)

Connect an oscilloscope to the A38-9 (OPM1) and A38-6 (DGND) terminals of the engine stop and start ECU connector.

*a
Component with harness connected

(Engine Stop and Start ECU)
- -
Connect the GTS to the DLC3.
Turn the engine switch on (IG).

Tech Tips

Do not start the engine.
Turn the GTS on.
Enter the following menus: Powertrain / Stop and Start / Active Test / Oil Pump.

Powertrain > Stop and Start > Active Test

Tester Display

Oil Pump


*a	5 V/DIV.
*b	5 ms./DIV.

Check the waveform while performing the Active Test.

Item	Condition
Tester Connection	A38-9 (OPM1) - A38-6 (DGND)
Tool Setting	5 V/DIV., 5 ms./DIV.
Condition	Engine switch on (IG) (engine is stopped) Active Test "Oil Pump" being performed

Standard
The waveform is similar to that shown in the illustration with no noise.

Result

Proceed to
OK
NG (for 8AR-FTS)
NG (for 3ZR-FAE)

REPLACE ENGINE STOP AND START ECU Click here

NG (for 8AR-FTS)

REPLACE AUTOMATIC TRANSAXLE ASSEMBLY for U661E: Click here for U661F: Click here

NG (for 3ZR-FAE)

REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY for K114: Click here for K114F: Click here