RM38N0EC _59 Vehicle Exterior _111845 SLIDING ROOF / CONVERTIBLE _0505691 PANORAMIC FIXED MOONROOF WITH ONE-TOUCH FROSTED GLASS CONTROL SYSTEM C

SLIDING ROOF / CONVERTIBLE PANORAMIC FIXED MOONROOF WITH ONE-TOUCH FROSTED GLASS CONTROL SYSTEM B27514B Light Control Glass Noise Filter Over Temperature

DESCRIPTION

When the main body ECU (multiplex network body ECU) detects a collision or high circuit temperature malfunction, the system enters fail-safe mode and stores this DTC.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
B27514B	Light Control Glass Noise Filter Over Temperature	· Open or short in GSW circuit of main body ECU (multiplex network body ECU) · Malfunction in LIB1 circuit of main body ECU (multiplex network body ECU)	· Main body ECU (Multiplex network body ECU) · Power distribution box assembly · Airbag sensor assembly · Noise filter · Wire harness or connector	Main Body

WIRING DIAGRAM

1.229,0.771 1.688,0.969 0.458,0.198 10 false GSW 1.646,0.688 1.99,0.906 0.344,0.219 10 false 25 0.667,1.396 2.51,1.656 1.844,0.26 10 false Airbag Sensor Assembly 0.771,2.76 1.229,2.958 0.458,0.198 10 false K40 5.594,0.771 6.052,0.969 0.458,0.198 10 false GSW 5.313,0.594 5.771,0.792 0.458,0.198 10 false 20 3.906,0.698 4.365,0.896 0.458,0.198 10 false 43 3.854,1.24 4.313,1.438 0.458,0.198 10 false 4C 3.865,1.438 5.281,1.865 1.417,0.427 10 false Power Distribution Box Assembly 0.75,2.927 1.646,3.135 0.896,0.208 10 false Noise Filter 1.188,2.281 1.646,2.479 0.458,0.198 10 false BODY 1.646,2.167 2.104,2.365 0.458,0.198 10 false 8 5.615,2.271 6.073,2.469 0.458,0.198 10 false LIB1 5.281,2.271 5.74,2.469 0.458,0.198 10 false E38 5.323,2.083 5.563,2.281 0.24,0.198 10 false 28 5.063,2.729 7.094,3.094 2.031,0.365 10 false Main Body ECU (Multiplex Network Body ECU) 5.281,0.781 5.74,0.979 0.458,0.198 10 false MB 0.677,1.271 1.135,1.469 0.458,0.198 10 false E64

CAUTION / NOTICE / HINT

CAUTION:: After performing a procedure, make sure to disconnect the cable from the auxiliary battery terminal to clear the DTCs.

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

PROCEDURE

1.CHECK FOR DTC

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs: 50002 449

Check for DTCs.

Body Electrical > Main Body > Trouble Codes: 50001 449

Result:

Result	Proceed to
Only B27514B is output	A
B27514B and B124300 are output	B

2.CHECK HARNESS AND CONNECTOR (NOISE FILTER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

GO TO POWER DOOR LOCK CONTROL SYSTEM

Click hereVehicle Interior>DOOR LOCK>POWER DOOR LOCK CONTROL SYSTEM>B124300202111,999999,_58,_111830,_0505351,RM100000001ZMT9,B124300

2.CHECK HARNESS AND CONNECTOR (NOISE FILTER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

Pre-procedure1

Disconnect the K40 noise filter connector.

Disconnect the E38 main body ECU (multiplex network body ECU) connector.

Procedure1

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
Click Location & Routing(E38,K40)Location & Routingewd_type=routing;type=c,c;code=E38,K40 Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E38;pinno=28 Click Connector(K40)Body>Floor Wire>Noise Filterewd_type=component;type=c;code=K40;pinno=8
E38-28 (LIB1) - K40-8 (BODY)	Always	Below 1 Ω
E38-28 (LIB1) or K40-8 (BODY) - Body ground	Always	10 kΩ or higher

Tester Connection

Condition

Specified Condition

Click Location & Routing(E38,K40)Location & Routingewd_type=routing;type=c,c;code=E38,K40

Click Connector(E38)Instrument Panel>Instrument Panel Wire / Radio Wiring Sub-Assy / Telephone Computer Wire>Multiplex Network Body ECUewd_type=component;type=c;code=E38;pinno=28

Click Connector(K40)Body>Floor Wire>Noise Filterewd_type=component;type=c;code=K40;pinno=8

E38-28 (LIB1) - K40-8 (BODY)

Always

Below 1 Ω

E38-28 (LIB1) or K40-8 (BODY) - Body ground

Always

10 kΩ or higher

Result:

Proceed to
OK
NG

Post-procedure1

None

3.CHECK NOISE FILTER

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK NOISE FILTER

Pre-procedure1

Reconnect the K40 noise filter connector.

Reconnect the E38 main body ECU (multiplex network body ECU) connector.

Procedure1

0.625,0.25 1.021,0.521 0.396,0.271 0.385,1.667 0.656,1.25 true 0.104,0.125 0.417,0.323 0.313,0.198 10 false *a 0.688,0.313 1,0.51 0.313,0.198 10 false K40 0.208,1.729 0.698,2 0.49,0.271 10 false BODY

*a	Component with harness connected (Noise Filter)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
Click Location & Routing(K40)Location & Routingewd_type=routing;type=c;code=K40 Click Connector(K40)Body>Floor Wire>Noise Filterewd_type=component;type=c;code=K40;pinno=8
K40-8 (BODY) - Body ground	Ignition switch ON, dimmable panoramic roof glass switch on	2 to 14 V

Tester Connection

Condition

Specified Condition

Click Location & Routing(K40)Location & Routingewd_type=routing;type=c;code=K40

Click Connector(K40)Body>Floor Wire>Noise Filterewd_type=component;type=c;code=K40;pinno=8

K40-8 (BODY) - Body ground

Ignition switch ON, dimmable panoramic roof glass switch on

2 to 14 V

Result:

Proceed to
OK
NG

Post-procedure1

None

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,

REPLACE NOISE FILTER

Click hereVehicle Exterior>WINDOW / GLASS>LIGHT CONTROL NOISE FILTER>REMOVAL202111,202203,_59,_111844,_0499622,RM100000001YYKV,202203,999999,_59,_111844,_0499622,RM1000000022LLF,