DTC P261B: Engine Coolant Pump "B" Control Malfunction; DTC P261C: Engine Coolant Pump "B" Control Circuit Low; DTC P261D: Engine Coolant Pump "B" Control Circuit High [08/2013 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the Electric Water Pump.
5. Touch the engine water pump and check that the pump assembly is operating (vibrating).

   OK

   The engine water pump assembly is operating (vibrating).

NG → See step   4 

OK: Go to next step 

HINT: 

Confirm a good connection at the engine water pump assembly and ECM connectors.

1. Disconnect the engine water pump assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D61-2 (NWP) - A22-28 (WPI)	Always	Below 1 Ω
   D61-1 (SWP) - A22-29 (WPO)	Always	Below 1 Ω
   D61-2 (NWP) or A22-28 (WPI) - Body ground	Always	10 kΩ or higher
   D61-1 (SWP) or A22-29 (WPO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the engine water pump assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D61-2 (NWP) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Engine Water Pump Assembly)

NG → See step   15 

OK → See step   13 

HINT: 

Confirm a good connection at the engine water pump assembly and ECM connectors.

1. Disconnect the engine water pump assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D61-3 (+B) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Engine Water Pump Assembly)

NG → See step   9 

OK: Go to next step 

1. Disconnect the engine water pump assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D61-4 (PGND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the engine water pump assembly connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D61-2 (NWP) - A22-28 (WPI)	Always	Below 1 Ω
   D61-1 (SWP) - A22-29 (WPO)	Always	Below 1 Ω
   D61-2 (NWP) or A22-28 (WPI) - Body ground	Always	10 kΩ or higher
   D61-1 (SWP) or A22-29 (WPO) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the engine water pump assembly. Refer to REMOVAL [08/2013 - ] .

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ]
5. Turn the power switch off and wait for at least 30 seconds.
6. Turn the power switch on (IG).
7. Turn the Techstream on.
8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
10. Read the DTCs.
    RESULT
    
    

    Result	Proceed to
    DTC P261B, P261C or P261D is output	A
    DTC is not output	B

B → END 

A → See step   14 

1. Remove the ENG W/PMP relay from the engine room relay block and junction block assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	No auxiliary battery voltage applied between terminals 1 and 2	10 kΩ or higher
   3 - 5	Auxiliary battery voltage applied between terminals 1 and 2	Below 1 Ω

NG → REPLACE RELAY (ENG W/PMP RELAY) 

OK: Go to next step 

1. Remove the ENG W/PMP relay from the engine room relay block and junction block assembly.
2. Disconnect the engine water pump assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ENG W/PMP relay terminal 5 - D61-3 (+B)	Always	Below 1 Ω
   ENG W/PMP relay terminal 5 or D61-3 (+B) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the ENG W/PMP relay from the engine room relay block and junction block assembly.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   ENG W/PMP relay terminal 3 - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *1	Engine Room Relay Block and Junction Block Assembly
   *2	ENG W/PMP Relay

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the ENG W/PMP relay from the engine room relay block and junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ENG W/PMP relay terminal 2 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (ENG W/PMP RELAY - EFI MAIN RELAY)