DRL RELAY CIRCUIT CIRCUIT DESCRIPTION WIRING DIAGRAM
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1 HJH0 DRL REL CIRCUIT CIRCUIT DESCRIPTION The multiplex network body ECU controls the DRL No.4 relay. The DRL No.4 relay connects the daytime running light relay and the headlamp during DRL operation. The daytime running light relay controls the illuminance of the headlamp accordingly. IRING DIGRM D Daytime Running Light Relay S (*) IG J/ No.8 ody ECU PMI IJ G (*) IJ Engine Room R/ and J/ DRL G P (*) (*) 9 4I 8 4I E J9 J/C 4F 4F E G DRL /DIM HRL HON HLP Relay I (*) 5 DIM Relay HLP LO RH (*) 0 HLP LO RH (*4) 5 HLP LO LH (*) 0 HLP LO LH (*4) HLP HI RH HLP HI LH R (*, *4) Engine Room No. R/ DRL No.4 Relay 5 (*, *4) I Prius Preliminary Release (RM075U) 868
2 DRL E J 9 J/C R (*) R (*) I (*) (*) I R (*, *4) H7 Headlamp LH (*, *4) R (*, *4) H8 Headlamp RH (*, *4) (*, *4) + Center Connector No K D J9 J/C D Driver Side J/ 5 ECU K C5 Converter S MD C6 Engine Room J/ E D HED MIN M E 4 IN F5 F6 Fusible Link lock DC/DCS MIN attery E EE *: w/ Daytime Running Light *: w/o Daytime Running Light *: w/ HID *4: w/o HID I Prius Preliminary Release (RM075U) 869
3 05706 INSPECTION PROCEDURE HINT: Check it the headlamp (low beam and high beam) is normal before performing the following procedure. PERFORM CTIVE TEST USING HNDHELD TESTER Connect the handheld tester to the DLC. (b) Push the power switch ON (IG) and press the handheld tester main switch on. (c) Select the item below in the CTIVE TEST and then check that the tail relay operates. No./G (Multiplex Network ody ECU): Item Test Details Diagnostic Note DRL REL (Test Details) Turn daytime running light relay ON/OFF (Vehicle Condition) Power switch ON (IG), engine is stopped and light control S is in OFF : Headlamp (High beam) comes on. NG Go to step PROCEED TO NEXT CIRCUIT INSPECTION SHON IN PROLEM SMPTOMS TLE (SEE PGE 05677) INSPECT RUNNING LIGHT REL SS Connector Front View: D Measure the voltage according to the value(s) in the table below. + IG E I9977 D D lways 0 to 4 V D D Engine is running and parking brake is released 0 to 4 V NG Go to step Prius Preliminary Release (RM075U) 870
4 05707 INSPECT INSTRUMENT PNEL JUNCTION LOCK SS Measure the voltage according to the value(s) in the table below. ody ground Light control switch in HED elow V ody ground Engine is running and parking brake is released 0 to 4 V Instrument Panel Junction lock Connector Front View: HON I997 NG REPIR OR REPLCE HRNESS OR CONNECTOR (OD ECU ENGINE ROOM R/ ND J/) PROCEED TO NEXT CIRCUIT INSPECTION SHON IN PROLEM SMPTOMS TLE (SEE PGE 05677) 004 Prius Preliminary Release (RM075U) 87
5 CHECK HRNESS ND CONNECTOR(GROUND CIRCUIT) ire Harness View: D (b) Disconnect the connector from the daytime running light relay. Measure the resistance according to the value(s) in the table below. I9978 D ody ground lways elow Ω NG REPIR OR REPLCE HRNESS OR CONNECTOR 5 CHECK HRNESS ND CONNECTOR(POER SOURCE CIRCUIT) ire Harness View: D Measure the voltage according to the value(s) in the table below. I9978 D ody ground lways 0 to 4 V NG REPIR OR REPLCE HRNESS OR CONNECTOR 004 Prius Preliminary Release (RM075U) 87
6 INSPECT INSTRUMENT PNEL JUNCTION LOCK SS Measure the voltage according to the value(s) in the table below. ody ground Light control switch in HED elow V ody ground Engine running and parking brake is released 0 to 4 V Instrument Panel Junction lock Connector Front View: PMI I997 NG PROCEED TO NEXT CIRCUIT INSPECTION SHON IN PROLEM SMPTOMS TLE (SEE PGE 05677) REPIR OR REPLCE HRNESS OR CONNECTOR (INSTRUMENT PNEL JUNCTION LOCK DTIME RUNNING LIGHT REL) 004 Prius Preliminary Release (RM075U) 87
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