DTC P2511-149: HV CPU Power Relay Sense Circuit Intermittent No Continuity [11/2016 - ]: Procedure

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

   Result

   Proceed to
   Terminals have been disconnected.
   Terminals have not been disconnected.

Result:  2

Terminals have not been disconnected. 

See step  5

Result:  1

Terminals have been disconnected. 

See step  2

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

   Result

   Proceed to
   Master warning light illuminates.
   Master warning light does not illuminates.

   NOTE:

   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.

Result:  2

Master warning light does not illuminates. 

END 

Result:  1

Master warning light illuminates. 

See step  3

Refer to PROCEDURE - Step 3

Result

Result:  1

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.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

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

5. Turn the power switch off.

Result:  2

DTCs other than P2511-149 are also output. 

GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [11/2016 - 10/2017]  Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2017 - ] 

Result:  1

DTC P2511-149 is output again. 

See step  5

1. Check the connection of the auxiliary battery terminal.

   OK

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

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

CONNECT SECURELY 

Result:  1

OK 

See step  6

Refer to PROCEDURE - Step 1

Result

Result:  3

NG 

CONNECT SECURELY 

Result:  1

OK 

See step  7

1. Disconnect the A85 and A86 hybrid Vehicle Control ECU Assembly connectors.
2. Remove the IGCT relay from the No. 3 engine room relay block.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	No. 3 Engine Room Relay Block	*2	IGCT Relay
   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU Assembly)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A86-4 (+B1) - 5 (IGCT relay)	Power switch off	Below 1 Ω
   A85-1 (+B2) - 5 (IGCT relay)	Power switch off	Below 1 Ω

4. Install the IGCT relay.
5. Reconnect the A85 and A86 hybrid Vehicle Control ECU Assembly connectors.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  8

1. Check for intermittent problems.

   Refer to CHECK FOR INTERMITTENT PROBLEMS [02/2014 - ]

   1. Check the connection and terminal contact pressure of the connectors and wire harnesses between the hybrid Vehicle Control ECU Assembly and the No. 3 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. 3 engine room relay block.

   Result

   Proceed to
   Problem symptom does not recur.
   Problem symptom recurs.

Result:  1

Problem symptom does not recur. 

REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to  COMPONENTS [11/2016 - ] 

Result:  2

Problem symptom recurs. 

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA