DTC P314A-828: Inverter Coolant Pump Speed Signal [08/2013 - ]: Procedure

NEXT: Go to next step 

HINT: 

When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.

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

   OK

   The inverter water pump is operating (vibrating).

6. Turn the power switch off.

NG → See step   9 

OK: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

NG → CONNECT SECURELY 

OK: Go to next step 

1. Disconnect the A31 power management control ECU connector.
2. Disconnect the A41 inverter water pump assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a

   Rear view of wire harness connector (to Power Management Control ECU)

   *b

   Front view of wire harness connector (to Inverter Water Pump Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A31-14 (NIWP) - A41-2 (NWP)	Power switch off	Below 1 Ω
   A31-14 (NIWP) or A41-2 (NWP) -Body ground and other terminals	Power switch off	10 kΩ or higher

4. Reconnect the A31 power management control ECU connector.
5. Reconnect the A41 inverter water pump assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the A41 inverter water pump assembly connector.
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A31-14 (NIWP) - H1-6 (E1)	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

4. Turn the power switch off.
5. Reconnect the A41 inverter water pump assembly connector.

NG → See step   38 

OK: Go to next step 

NEXT: Go to next step 

HINT: 

When the auxiliary battery voltage is low, the inverter water pump assembly may not operate.

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Active Test / Activate the Water Pump.
4. Perform the "Activate the Water Pump" Active Test.
5. Connect an oscilloscope between the power management control ECU terminals specified in the table below, and measure the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Content
   Terminal	A31-14 (NIWP) - H1-6 (E1)
   Equipment Setting	5 V/DIV., 100 ms./DIV.
   Condition	Power switch on (IG), during Active Test

   OK

   The duration of wavelength A is 300 msec or less.

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Power Management Control ECU)

6. Turn the power switch off.

NG → See step   37 

OK → See step   38 

NG → CONNECT SECURELY 

OK: Go to next step 

1. Check installation condition of the INV W/PMP relay.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP Relay

   OK

   INV W/PMP relay is installed correctly.

NG → See step   34 

OK: Go to next step 

1. Remove the INV W/PMP relay and IGCT relay from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (INV W/PMP relay) - 5 (IGCT relay)	Power switch off	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP Relay
   *3	IGCT Relay

   NOTE:

   Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

   HINT: 

   • Connectors

     Slightly shake the connector vertically and horizontally.

   • Wire Harness

     Slightly shake the wire harness vertically and horizontally.

     The connector joint and fulcrum of the vibration are the major areas that should be checked thoroughly.

   • No. 2 Engine Room Relay Block

     Apply slight vibration with a finger to the No. 2 engine room relay block and check whether a malfunction occurs.

   • INV W/PMP RLY Fuse

     Apply slight vibration with a finger to the INV W/PMP RLY fuse and check whether a malfunction occurs.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Example
   *b	Shake Slightly
   *c	Vibrate Slightly

3. Install the INV W/PMP relay and IGCT relay.

NG → See step   29 

OK: Go to next step 

1. Remove the INV W/PMP relay from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2	10 kΩ or higher
   	Auxiliary battery voltage is applied between terminals 1 and 2	Below 1Ω

   TEXT IN ILLUSTRATION
   
   

   *1	INV W/PMP Relay

3. Install the INV W/PMP relay.

NG → See step   23 

OK: Go to next step 

1. Disconnect the A41 inverter water pump assembly connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A41-4 (+BWP) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

   NOTE:

   • Turning the power switch on (IG) with the power management control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
   • Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

   HINT: 

   • Connectors

     Slightly shake the connector vertically and horizontally.

   • Wire Harness

     Slightly shake the wire harness vertically and horizontally.

     The connector joint and fulcrum of the vibration are the major areas that should be checked thoroughly.

   • No. 2 Engine Room Relay Block

     Apply slight vibration with a finger to the No. 2 engine room relay block and check whether a malfunction occurs.

   • INV W/PMP Fuse

     Apply slight vibration with a finger to the INV W/PMP fuse and check whether a malfunction occurs.

   • INV W/PMP relay

     Apply slight vibration with a finger to the INV W/PMP relay and check whether a malfunction occurs.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *a	Example
   *b	Shake Slightly
   *c	Vibrate Slightly

3. Reconnect the A41 inverter water pump assembly connector.

NG → See step   15 

OK: Go to next step 

1. Disconnect the A41 inverter water pump assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A41-1 (GND) - Body ground	Power switch off	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

3. Reconnect the A41 inverter water pump assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   37 

1. Check installation condition of the INV W/PMP fuse.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP Fuse

   OK

   INV W/PMP fuse is installed correctly.

NG → CONNECT SECURELY 

OK: Go to next step 

1. Remove the INV W/PMP relay from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2	10 kΩ or higher
   	Auxiliary battery voltage is applied between terminals 1 and 2	Below 1Ω

   TEXT IN ILLUSTRATION
   
   

   *1	INV W/PMP Relay

3. Install the INV W/PMP relay.

NG → See step   20 

OK: Go to next step 

1. Remove the INV W/PMP relay from the No. 2 engine room relay block.
2. Disconnect the A41 inverter water pump assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block	*2	INV W/PMP Relay
   *a	Front view of wire harness connector (to Inverter Water Pump Assembly)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A41-4 (+BWP) - 3 (INV W/PMP relay)	Power switch off	Below 1 Ω
   A41-4 (+BWP) or 3 (INV W/PMP relay) - Body ground and other terminals	Power switch off	10 kΩ or higher

   NOTE:

   Do not apply excessive force when using the probes of the tester to perform the inspection. If excessive force is used, the terminals will be damaged.

4. Install the INV W/PMP relay.
5. Reconnect the A41 inverter water pump assembly connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the INV W/PMP fuse from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   INV W/PMP fuse	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP Fuse

3. Install the INV W/PMP fuse.

NG → See step   19 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP FUSE HOLDER TERMINAL OR INV W/PMP RELAY HOLDER TERMINAL) 

Refer to COMPONENTS [08/2013 - ]

NEXT → REPLACE FUSE (INV W/PMP) 

1. Check the terminals of the INV W/PMP relay holder.

   OK

   The terminals of the INV W/PMP relay holder are not bent, loose or corroded.

NG → See step   24 

OK: Go to next step 

1. Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP RLY Fuse

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   INV W/PMP RLY fuse	Always	Below 1 Ω

3. Install the INV W/PMP RLY fuse.

NG → See step   22 

OK → REPLACE RELAY (INV W/PMP) 

NEXT → REPLACE FUSE (INV W/PMP RLY) 

1. Check the terminals of the INV W/PMP relay holder.

   OK

   The terminals of the INV W/PMP relay holder are not bent, loose or corroded.

NG → See step   26 

OK → REPLACE RELAY (INV W/PMP) 

1. Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP RLY Fuse

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   INV W/PMP RLY fuse	Always	Below 1 Ω

3. Install the INV W/PMP RLY fuse.

NG → See step   27 

OK: Go to next step 

NEXT → REPLACE RELAY (INV W/PMP) 

NEXT → REPLACE RELAY (INV W/PMP) 

NEXT: Go to next step 

NEXT → REPLACE RELAY (INV W/PMP) 

1. Check installation condition of the INV W/PMP RLY fuse.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP RLY Fuse

   OK

   INV W/PMP RLY fuse is installed correctly.

NG → See step   33 

OK: Go to next step 

1. Remove the INV W/PMP RLY fuse from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   INV W/PMP RLY fuse	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	No. 2 Engine Room Relay Block
   *2	INV W/PMP RLY Fuse

3. Install the INV W/PMP RLY fuse.

NG → See step   31 

OK → REPAIR OR REPLACE HARNESS OR CONNECTOR (INV W/PMP RLY FUSE HOLDER TERMINAL) 

1. Check the terminals of the INV W/PMP RLY fuse holder.

   OK

   The terminals of the INV W/PMP RLY fuse holder are not bent, loose or corroded.

NG → See step   32 

OK → REPLACE FUSE (INV W/PMP RLY) 

NEXT → REPLACE FUSE (INV W/PMP RLY) 

1. Remove the INV W/PMP relay from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2	10 kΩ or higher
   	Auxiliary battery voltage is applied between terminals 1 and 2	Below 1Ω

   TEXT IN ILLUSTRATION
   
   

   *1	INV W/PMP Relay

3. Install the INV W/PMP relay.

NG → See step   35 

OK → CONNECT SECURELY (INV W/PMP RLY FUSE) 

1. Remove the INV W/PMP relay from the No. 2 engine room relay block.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2	10 kΩ or higher
   	Auxiliary battery voltage is applied between terminals 1 and 2	Below 1Ω

   TEXT IN ILLUSTRATION
   
   

   *1	INV W/PMP Relay

3. Install the INV W/PMP relay.

NG → See step   36 

OK → CONNECT SECURELY (INV W/PMP RELAY) 

NEXT → CONNECT SECURELY (INV W/PMP RLY FUSE) 

NEXT → CONNECT SECURELY (INV W/PMP RELAY)