THEFT DETERRENT / KEYLESS ENTRY THEFT DETERRENT SYSTEM Engine Hood Courtesy Switch Circuit

DESCRIPTION

The engine hood courtesy switch is built into the hood lock assembly. This switch turns on when the engine hood is closed and turns off when the engine hood is opened.

WIRING DIAGRAM

5.427,2.063 7.094,2.438 1.667,0.375 10 false Main Body ECU (Multiplex Network Body ECU) 0.823,1.531 2.656,1.917 1.833,0.385 10 false Engine Hood Courtesy Switch (Hood Lock Assembly) 5.844,1.01 6.281,1.24 0.438,0.229 10 false HCTY 5.573,1.01 6.01,1.24 0.438,0.229 10 false 27 2.021,1.01 2.458,1.24 0.438,0.229 10 false 1 0.969,1.01 1.406,1.24 0.438,0.229 10 false 2 5.438,1.896 5.875,2.125 0.438,0.229 10 false E37 0.833,1.375 1.271,1.604 0.438,0.229 10 false A18 1.833,1.01 2.271,1.24 0.438,0.229 10 false + 1.146,1.031 1.583,1.26 0.438,0.229 10 false E

CAUTION / NOTICE / HINT

NOTICE:: Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

PROCEDURE

1.READ VALUE USING GTS

a.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Hood Courtesy Switch Status	Engine hood courtesy switch	Close or Open	Close: Engine hood closed Open: Engine hood open	-

OK:: The GTS display changes correctly in response to the engine hood courtesy switch (hood lock assembly) status.

Body Electrical > Main Body > Data List

Tester Display
Hood Courtesy Switch Status

50003 449 37

Result:

Proceed to
OK
NG

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

NG

2.INSPECT ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENGINE HOOD COURTESY SWITCH>INSPECTION202111,999999,_58,_111832,_0501285,RM100000001Z5EV,

Result:

Proceed to
OK
NG

OK

3.CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

NG

REPLACE ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY)

Click hereVehicle Interior>THEFT DETERRENT / KEYLESS ENTRY>ENGINE HOOD COURTESY SWITCH>REMOVAL202111,999999,_58,_111832,_0501285,RM100000001Z5EW,

3.CHECK HARNESS AND CONNECTOR (ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

a.

Disconnect the E37 main body ECU (multiplex network body ECU) connector.

b.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(A18,E37)Location & Routingewd_type=routing;type=c,c;code=A18,E37 Click Connector(A18)Engine Compartment>Engine Room Main Wire / Transmission Wire>Engine Hood Courtesy Switch (Hood Lock Assembly)ewd_type=component;type=c;code=A18;pinno=1,2 Click Connector(E37)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E37;pinno=27
A18-1 (+) - E37-27 (HCTY)	Always	Below 1 Ω
A18-1 (+) or E37-27 (HCTY) - Other terminals and body ground	Always	10 kΩ or higher
A18-2 (E) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL202111,202203,_57,_111828,_0500082,RM100000001Z1A6,202203,202303,_57,_111828,_0500082,RM1000000022I31,202303,202406,_57,_111828,_0500082,RM100000002B19F,202406,999999,_57,_111828,_0500082,RM100000002MQ55,

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR