DTC P2511-149: HV CPU Power Relay Sense Circuit Intermittent No Continuity [10/2015 - ]: Procedure

1. Confirm whether the auxiliary battery terminals have been disconnected recently.

   Result

   Result	Proceed to
   Terminals have been disconnected.	A
   Terminals have not been disconnected.	B

B 

See step  5

A 

See step  2

1. Turn the power switch on (READY) from off.
2. Confirm that the master warning light illuminates.

   Result

   Result	Proceed to
   Master warning light illuminates.	A
   Master warning light does not illuminates.	B

   HINT: 

   DTC P2511-149 may be stored after disconnecting and reconnecting the auxiliary battery terminals. If this happens, the DTC will not be output if the power switch is turned off and then on (READY) again. In this case, clear DTCs to complete the inspection.

3. Turn the power switch off.

B 

END 

A 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Read and record the DTCs and freeze frame data.
5. Clear the DTCs and freeze frame data.
6. Turn the power switch off.

NEXT 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.
4. Check for DTCs.

   Result

   Result	Proceed to
   DTC P2511-149 is output again.	A
   DTCs other than P2511-149 are also output.	B

5. Turn the power switch off.

B 

GO TO DTC CHART (HYBRID CONTROL SYSTEM) 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2015 - ] )

A 

See step  5

1. Check the connection of the auxiliary battery terminal.

   OK

   The terminal is connected securely and there is no contact problem.

NG 

CONNECT SECURELY 

OK 

See step  6

See step  3

NG 

CONNECT SECURELY 

OK 

See step  7

1. Remove the IGCT relay from the No. 2 engine room relay block.
2. Disconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	No. 2 Engine Room Relay Block	*2	IGCT Relay
   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)	-	-

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A68-4 (+B1) - 5 (IGCT relay)	Power switch off	Below 1 Ω
   A67-1 (+B2) - 5 (IGCT relay)	Power switch off	Below 1 Ω

4. Install the IGCT relay.
5. Reconnect the A67 and A68 hybrid vehicle control ECU assembly connectors.

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK 

See step  8

1. Check for intermittent problems (Refer to CHECK FOR INTERMITTENT PROBLEMS [10/2014 - ] ).
   1. Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the No. 2 engine room relay block.
   2. When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU assembly and the No. 2 engine room relay block.

      Result

      Result	Proceed to
      Problem symptom does not recur.	A
      Problem symptom recurs.	B

A 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

(Refer to COMPONENTS [10/2015 - ] )

B 

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA