P2511

HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P2511-149: ECM/PCM Power Relay Sense Circuit Intermittent
P2511-149 - ECM/PCM Power Relay Sense Circuit Intermittent

DESCRIPTION

The hybrid vehicle control ECU monitors the +B power source voltage to detect an instantaneous interruption.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BATTERY TERMINAL

(a) Check the connection of the auxiliary battery terminal.

Result:

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

NG -- CONNECT SECURELY
OK -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0343

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - IGCT RELAY)

(a) Remove the IGCT relay from the engine room junction block assembly.

(b) Disconnect connector A58 from hybrid vehicle control ECU.





Text in Illustration





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

Standard Resistance:





(d) Install the IGCT relay.

(e) Connect the hybrid vehicle control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems Check For Intermittent Problems.

(1) Check the connection and terminal contact pressure of connectors and wire harnesses between the hybrid vehicle control ECU and the engine room junction block.

(2) When the power switch is on (READY), jiggle the connectors and wire harnesses between the hybrid vehicle control ECU and the engine room junction block assembly.

Result:





B -- REPAIR MALFUNCTIONING PARTS, COMPONENT AND AREA

A -- REPLACE HYBRID VEHICLE CONTROL ECU Components