K3-ve Cooling Cooling Fan System Cooling Fan Circuit 311b44
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TECHNICAL DESCRIPTION To control the cooling fan, the EC M turns on or off the cooling fan relay based on the engine coolant temperature, air conditioning switch, refrigerant pressure, engine speed and vehicle speed signals.
WIRING DIAGRAM Refer to System Diagram (See page Engine / Hybrid System>K3-VE C OOLING>C OOLING FAN SYSTEM>SYSTEM DIAGRAM).
CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE 1.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY VOLTAGE) a.
*1
*2
*1
Engine Room Relay Block
*2
RAD Relay
Remove the RAD relay from the engine room relay block. b.
Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Specified Condition Connection Condition RAD relay
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terminal 3 - Body ground
c.
Always
11 to 14V
Reinstall the RAD relay. Result: Proceed to OK NG
OK 2.CHECK WIRE HARNESS AND CONNECTOR (AM2 VOLTAGE) NG REPAIR OR REPLACE HARNESS AND CONNECTOR
2.CHECK WIRE HARNESS AND CONNECTOR (AM2 VOLTAGE) a.
Disconnect the ignition or starter switch assembly connector.
b.
Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Specified Condition Connection Condition E28-5 (AM2) Body ground
c.
Always
11 to 14V
Reconnect the ignition or starter switch assembly connector. Result: Proceed to OK NG
OK 3.INSPECT RAD RELAY NG REPAIR OR REPLACE HARNESS AND CONNECTOR
3.INSPECT RAD RELAY a.
Inspect the RAD relay. C lick hereEngine / Hybrid System>K3-VE C OOLING>RELAY>ON-VEHIC LE INSPEC TION
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Result: Proceed to OK NG
OK 4.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY NG REPLACE RAD RELAY
4.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY a.
Inspect the ignition or starter switch assembly. C lick hereEngine / Hybrid System>K3-VE STARTING>IGNITION SWITC H>INSPEC TION Result: Proceed to OK NG
OK 5.CHECK WIRE HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - RAD RELAY) NG REPLACE IGNITION OR STARTER SWITCH ASSEMBLY C lick hereEngine / Hybrid System>K3-VE STARTING>IGNITION SWITC H>INSPEC TION 5.CHECK WIRE HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - RAD RELAY) a.
Disconnect the ignition or starter switch assembly connector.
b.
Remove the RAD relay from the engine room relay block.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition E28-6 (IG2) RAD relay terminal 2
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition http://intranet.toyotaperu.com.pe/tdp_sit/data/TOYOTA/AVANZA/N00014/manual/repair/contents/RM0000000001UT6.html?PUB_TYPE=RM&MODE=1
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E28-6 (IG2) or RAD relay terminal 2 - Body ground
Always
10 kΩ or higher
d.
Reinstall the RAD relay.
e.
Reconnect the ignition or starter switch assembly connector. Result: Proceed to OK NG
OK 6.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - BODY GROUND) NG REPAIR OR REPLACE HARNESS AND CONNECTOR
6.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - BODY GROUND) a.
Disconnect the cooling fan motor connector.
b.
Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Specified Condition Connection Condition A6-1 - Body ground
c.
Always
Below 1 Ω
Reconnect the cooling fan motor connector. Result: Proceed to OK NG
OK 7.INSPECT COOLING FAN MOTOR NG REPAIR OR REPLACE HARNESS AND CONNECTOR
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7.INSPECT COOLING FAN MOTOR a.
Inspect the cooling fan motor C lick hereEngine / Hybrid System>K3-VE C OOLING>C OOLING FAN MOTOR>ON-VEHIC LE INSPEC TION Result: Proceed to OK NG
OK 8.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - RAD RELAY) NG REPLACE COOLING FAN MOTOR C lick hereEngine / Hybrid System>K3-VE C OOLING>C OOLING FAN MOTOR>REMOVAL 8.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - RAD RELAY) a.
Disconnect the cooling fan motor connector.
b.
Remove the RAD relay from the engine room relay block.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition A6-2 - RAD relay terminal 5
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition A6-2 or RAD relay terminal 5 Body ground
Always
10 kΩ or higher
d.
Reinstall the RAD relay.
e.
Reconnect the cooling fan motor connector. Result: Proceed to OK NG
OK 9.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY - ECM) http://intranet.toyotaperu.com.pe/tdp_sit/data/TOYOTA/AVANZA/N00014/manual/repair/contents/RM0000000001UT6.html?PUB_TYPE=RM&MODE=1
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NG REPAIR OR REPLACE HARNESS AND CONNECTOR
9.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY - ECM) a.
Remove the RAD relay from the engine room relay block.
b.
Disconnect the EC M connector.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition E3-16 (FAN) RAD relay terminal 1
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition E3-16 (FAN) or RAD relay terminal 1 - Body ground
Always
d.
Reconnect the EC M connector.
e.
Reinstall the RAD relay. Result: Proceed to
10 kΩ or higher
OK NG
OK REPLACE ECM C lick hereEngine / Hybrid System>K3-VE ENGINE C ONTROL>EC M(for LHD)>REMOVAL NG REPAIR OR REPLACE HARNESS AND CONNECTOR
© 2012 TOYOTA MOTOR C ORPORATION. All Rights Reserved.
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TECHNICAL DESCRIPTION To control the cooling fan, the EC M turns on or off the cooling fan relay based on the engine coolant temperature, air conditioning switch, refrigerant pressure, engine speed and vehicle speed signals.
WIRING DIAGRAM Refer to System Diagram (See page Engine / Hybrid System>K3-VE C OOLING>C OOLING FAN SYSTEM>SYSTEM DIAGRAM).
CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE 1.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY VOLTAGE) a.
*1
*2
*1
Engine Room Relay Block
*2
RAD Relay
Remove the RAD relay from the engine room relay block. b.
Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Specified Condition Connection Condition RAD relay
http://intranet.toyotaperu.com.pe/tdp_sit/data/TOYOTA/AVANZA/N00014/manual/repair/contents/RM0000000001UT6.html?PUB_TYPE=RM&MODE=1
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terminal 3 - Body ground
c.
Always
11 to 14V
Reinstall the RAD relay. Result: Proceed to OK NG
OK 2.CHECK WIRE HARNESS AND CONNECTOR (AM2 VOLTAGE) NG REPAIR OR REPLACE HARNESS AND CONNECTOR
2.CHECK WIRE HARNESS AND CONNECTOR (AM2 VOLTAGE) a.
Disconnect the ignition or starter switch assembly connector.
b.
Measure the voltage according to the value(s) in the table below. Standard Voltage: Tester Specified Condition Connection Condition E28-5 (AM2) Body ground
c.
Always
11 to 14V
Reconnect the ignition or starter switch assembly connector. Result: Proceed to OK NG
OK 3.INSPECT RAD RELAY NG REPAIR OR REPLACE HARNESS AND CONNECTOR
3.INSPECT RAD RELAY a.
Inspect the RAD relay. C lick hereEngine / Hybrid System>K3-VE C OOLING>RELAY>ON-VEHIC LE INSPEC TION
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Result: Proceed to OK NG
OK 4.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY NG REPLACE RAD RELAY
4.INSPECT IGNITION OR STARTER SWITCH ASSEMBLY a.
Inspect the ignition or starter switch assembly. C lick hereEngine / Hybrid System>K3-VE STARTING>IGNITION SWITC H>INSPEC TION Result: Proceed to OK NG
OK 5.CHECK WIRE HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - RAD RELAY) NG REPLACE IGNITION OR STARTER SWITCH ASSEMBLY C lick hereEngine / Hybrid System>K3-VE STARTING>IGNITION SWITC H>INSPEC TION 5.CHECK WIRE HARNESS AND CONNECTOR (IGNITION OR STARTER SWITCH ASSEMBLY - RAD RELAY) a.
Disconnect the ignition or starter switch assembly connector.
b.
Remove the RAD relay from the engine room relay block.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition E28-6 (IG2) RAD relay terminal 2
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition http://intranet.toyotaperu.com.pe/tdp_sit/data/TOYOTA/AVANZA/N00014/manual/repair/contents/RM0000000001UT6.html?PUB_TYPE=RM&MODE=1
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E28-6 (IG2) or RAD relay terminal 2 - Body ground
Always
10 kΩ or higher
d.
Reinstall the RAD relay.
e.
Reconnect the ignition or starter switch assembly connector. Result: Proceed to OK NG
OK 6.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - BODY GROUND) NG REPAIR OR REPLACE HARNESS AND CONNECTOR
6.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - BODY GROUND) a.
Disconnect the cooling fan motor connector.
b.
Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Specified Condition Connection Condition A6-1 - Body ground
c.
Always
Below 1 Ω
Reconnect the cooling fan motor connector. Result: Proceed to OK NG
OK 7.INSPECT COOLING FAN MOTOR NG REPAIR OR REPLACE HARNESS AND CONNECTOR
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7.INSPECT COOLING FAN MOTOR a.
Inspect the cooling fan motor C lick hereEngine / Hybrid System>K3-VE C OOLING>C OOLING FAN MOTOR>ON-VEHIC LE INSPEC TION Result: Proceed to OK NG
OK 8.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - RAD RELAY) NG REPLACE COOLING FAN MOTOR C lick hereEngine / Hybrid System>K3-VE C OOLING>C OOLING FAN MOTOR>REMOVAL 8.CHECK WIRE HARNESS AND CONNECTOR (COOLING FAN MOTOR - RAD RELAY) a.
Disconnect the cooling fan motor connector.
b.
Remove the RAD relay from the engine room relay block.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition A6-2 - RAD relay terminal 5
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition A6-2 or RAD relay terminal 5 Body ground
Always
10 kΩ or higher
d.
Reinstall the RAD relay.
e.
Reconnect the cooling fan motor connector. Result: Proceed to OK NG
OK 9.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY - ECM) http://intranet.toyotaperu.com.pe/tdp_sit/data/TOYOTA/AVANZA/N00014/manual/repair/contents/RM0000000001UT6.html?PUB_TYPE=RM&MODE=1
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NG REPAIR OR REPLACE HARNESS AND CONNECTOR
9.CHECK WIRE HARNESS AND CONNECTOR (RAD RELAY - ECM) a.
Remove the RAD relay from the engine room relay block.
b.
Disconnect the EC M connector.
c.
Measure the resistance according to the value(s) in the table below. Standard Resistance (Check for Open): Tester Specified Condition Connection Condition E3-16 (FAN) RAD relay terminal 1
Always
Below 1 Ω
Standard Resistance (Check for Short): Tester Specified Condition Connection Condition E3-16 (FAN) or RAD relay terminal 1 - Body ground
Always
d.
Reconnect the EC M connector.
e.
Reinstall the RAD relay. Result: Proceed to
10 kΩ or higher
OK NG
OK REPLACE ECM C lick hereEngine / Hybrid System>K3-VE ENGINE C ONTROL>EC M(for LHD)>REMOVAL NG REPAIR OR REPLACE HARNESS AND CONNECTOR
© 2012 TOYOTA MOTOR C ORPORATION. All Rights Reserved.
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