RM38T0EC _59 Vehicle Exterior _112294 LIGHTING (EXT) _0510962 LIGHTING SYSTEM J

LIGHTING (EXT)  LIGHTING SYSTEM  Rear Fog Light Circuit  


DESCRIPTION

The main body ECU (multiplex network body ECU) controls the rear fog light.

WIRING DIAGRAM

E463163E05
4.552,1.75 5.01,1.948 0.458,0.198 10 false IPD 5.219,1.51 5.677,1.708 0.458,0.198 10 false CPU 3.906,3.583 6.01,3.813 2.104,0.229 10 false 8F 3.906,3.74 6.01,3.969 2.104,0.229 10 false Power Distribution Box Assembly 4.01,1.635 4.635,2.115 0.625,0.479 10 false 7 4.615,1.323 5.24,1.802 0.625,0.479 10 false +B 5.365,4.219 7.073,4.583 1.708,0.365 10 false Main Body ECU (Multiplex Network Body ECU) 0.74,4.146 2.844,4.375 2.104,0.229 10 false : CXPI Communication Line 1.063,2.229 3.833,2.448 2.771,0.219 10 false U51 1.063,2.417 3.833,2.635 2.771,0.219 10 false Rear Light Assembly LH 2.344,1.656 3.26,2.083 0.917,0.427 10 false B 1.146,1.625 2.063,2.052 0.917,0.427 10 false E 0.938,1.615 1.854,2.042 0.917,0.427 10 false 3 2.615,1.615 3.531,2.042 0.917,0.427 10 false 1 1.51,1.927 2.427,2.354 0.917,0.427 10 false Rear Fog 0.135,0.104 2.24,0.521 2.104,0.417 12 false for TFTM Made:

E463163E06
4.552,1.75 5.01,1.948 0.458,0.198 10 false IPD 5.219,1.51 5.677,1.708 0.458,0.198 10 false CPU 3.906,3.583 6.01,3.813 2.104,0.229 10 false 8F 3.906,3.74 6.01,3.969 2.104,0.229 10 false Power Distribution Box Assembly 4.01,1.635 4.635,2.115 0.625,0.479 10 false 7 4.615,1.323 5.24,1.802 0.625,0.479 10 false +B 5.365,4.219 7.073,4.583 1.708,0.365 10 false Main Body ECU (Multiplex Network Body ECU) 0.74,4.146 2.844,4.375 2.104,0.229 10 false : CXPI Communication Line 1.063,2.229 3.833,2.448 2.771,0.219 10 false U7 1.063,2.417 3.833,2.635 2.771,0.219 10 false Rear Light Assembly LH 2.344,1.656 3.26,2.083 0.917,0.427 10 false B 1.146,1.625 2.063,2.052 0.917,0.427 10 false E 0.938,1.615 1.854,2.042 0.917,0.427 10 false 3 2.615,1.615 3.531,2.042 0.917,0.427 10 false 2 1.51,1.927 2.427,2.354 0.917,0.427 10 false Rear Fog 0.135,0.104 2.24,0.521 2.104,0.417 12 false for GTMC Made:

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses for circuits related to this system before performing the following procedure.

·

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.*1

*1: w/ Smart Entry and Start System




PROCEDURE

1.READ VALUE USING GTS
a.

Turn the rear fog light switch on.


b.

Using the GTS, read the Data List.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Fog Light Fuse Shut Off Status Rear fog light fuse OFF or ON OFF: Fuse not shut off
ON: Fuse shut off 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Fog Light Fuse Shut Off Status
50003 475 1313
OK:

The Data List value displays "OFF".



Result:
Result Proceed to
OK A
NG (for TFTM Made) B
NG (for GTMC Made) C



A

2.READ VALUE USING GTS

B

6.CHECK REAR LIGHT ASSEMBLY LH

C

8.CHECK REAR LIGHT ASSEMBLY LH
2.READ VALUE USING GTS
a.

Using the GTS, read the Data List.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Fog Light Input Signal Rear fog light switch input signal OFF or ON OFF: Rear fog light switch off
ON: Rear fog light switch on 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Fog Light Input Signal
50003 475 1310
OK:

Display changes according to the rear fog light switch operation.



Result:
Proceed to
OK
NG



OK

3.READ VALUE USING GTS

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereVehicle Exterior>LIGHTING (EXT)>LIGHTING SYSTEM>PROBLEM SYMPTOMS TABLE


3.READ VALUE USING GTS
a.

Using the GTS, read the Data List.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Fog Light Output Signal Rear fog light output condition OFF or ON OFF: Rear fog light not illuminated
ON: Rear fog light illuminated 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Fog Light Output Signal
50003 475 1311
OK:

Display changes according to the rear fog light switch operation.



Result:
Result Proceed to
OK (for TFTM Made) A
OK (for GTMC Made) B
NG C



A

4.CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

B

5.CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)

C

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


4.CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
a.

Disconnect the U51 rear light assembly LH connector.


b.

Disconnect the 8F power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U51-1 (B) - 8F-7 Always Below 1 Ω
U51- 3 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.CHECK HARNESS AND CONNECTOR (REAR LIGHT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND)
a.

Disconnect the U7 rear light assembly LH connector.


b.

Disconnect the 8F power distribution box assembly connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U7-2 (B) - 8F-7 Always Below 1 Ω
U7-3 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK REAR LIGHT ASSEMBLY LH
a.

Disconnect the U51 rear light assembly LH connector.


b.

Turn the rear fog light switch on.


c.

Using the GTS, read the Data List.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Fog Light Fuse Shut Off Status Rear fog light fuse OFF or ON OFF: Fuse not shut off
ON: Fuse shut off 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Fog Light Fuse Shut Off Status
50003 475 1313
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR LIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR LIGHT ASSEMBLY>REMOVAL


NG

7.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - REAR LIGHT ASSEMBLY LH)
7.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - REAR LIGHT ASSEMBLY LH)
a.

Disconnect the 8F power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U51-1 (B) - Body ground Always 10 kΩ or higher
8F-7 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

8.CHECK REAR LIGHT ASSEMBLY LH
a.

Disconnect the U7 rear light assembly connector.


b.

Turn the rear fog light switch on.


c.

Using the GTS, read the Data List.

Body Electrical > Power Distribution Box > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Rear Fog Light Fuse Shut Off Status Rear fog light fuse OFF or ON OFF: Fuse not shut off
ON: Fuse shut off 		-
Body Electrical > Power Distribution Box > Data List
Tester Display
Rear Fog Light Fuse Shut Off Status
50003 475 1313
OK:

The Data List value displays "OFF".



Result:
Proceed to
OK
NG



OK

REPLACE REAR LIGHT ASSEMBLY LH

Click hereVehicle Exterior>LIGHTING (EXT)>REAR LIGHT ASSEMBLY>REMOVAL


NG

9.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - REAR LIGHT ASSEMBLY LH)
9.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - REAR LIGHT ASSEMBLY LH)
a.

Disconnect the 8F power distribution box assembly connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
U7-2 (B) - Body ground Always 10 kΩ or higher
8F-7 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

Click herePower Source / Network>POWER DISTRIBUTION>MAIN BODY ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR