RM38T0EC _58 Vehicle Interior _114202 SEAT BELT _0506146 SEAT BELT WARNING SYSTEM U

SEAT BELT  SEAT BELT WARNING SYSTEM  TERMINALS OF ECU  


CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


a.

Remove the main body ECU (multiplex network body ECU).

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

E469803C04
4.417,3.24 4.802,3.469 0.385,0.229 2.281,4.5 2.667,4.729 0.385,0.229 4.594,4.5 4.979,4.729 0.385,0.229 1.146,6.104 1.531,6.333 0.385,0.229 3,6.104 3.385,6.333 0.385,0.229 4.25,6.104 4.635,6.333 0.385,0.229 3.438,7.781 3.823,8.01 0.385,0.229 2.135,1.385 2.521,1.615 0.385,0.229 2.135,1.771 2.521,2 0.385,0.229 2.292,3.24 2.677,3.469 0.385,0.229 3.792,0.292 4.177,0.521 0.385,0.229 5.26,6.104 5.646,6.333 0.385,0.229 6.26,6.104 6.646,6.333 0.385,0.229 2.01,0.698 2.333,0.427 false 1.396,0.521 1.719,0.25 false 0.948,1.875 1.26,2.073 0.313,0.198 10 false 8K 0.948,2.385 1.26,2.583 0.313,0.198 10 false 8H 0.958,1.083 1.271,1.281 0.313,0.198 10 false 8F 0.958,1.583 1.271,1.781 0.313,0.198 10 false 8E 2.229,1.417 2.688,1.615 0.458,0.198 10 false I85 2.229,1.792 2.688,1.99 0.458,0.198 10 false I86 3.854,0.313 4.24,0.5 0.385,0.188 10 false MB 2.396,3.26 2.865,3.469 0.469,0.208 10 false I85 4.521,3.26 4.979,3.458 0.458,0.198 10 false I86 3.104,6.135 3.563,6.333 0.458,0.198 10 false 8E 3.51,7.802 3.969,8 0.458,0.198 10 false MB 2.385,0.354 2.698,0.552 0.313,0.198 10 false *2 6.021,1.719 6.333,1.917 0.313,0.198 10 false 8B 6.031,1.135 6.344,1.333 0.313,0.198 10 false 8C 0.948,2.135 1.26,2.333 0.313,0.198 10 false 8J 4.688,4.521 5,4.719 0.313,0.198 10 false 8B 2.375,4.531 2.688,4.729 0.313,0.198 10 false 8C 1.26,6.135 1.573,6.333 0.313,0.198 10 false 8F 4.344,6.125 4.656,6.323 0.313,0.198 10 false 8K 5.344,6.125 5.656,6.323 0.313,0.198 10 false 8J 6.365,6.125 6.677,6.323 0.313,0.198 10 false 8H 1.771,0.146 2.083,0.344 0.313,0.198 10 false *1
*1 Power Distribution Box Assembly *2 Main Body ECU (Multiplex Network Body ECU)



b.

Reconnect the power distribution box assembly connectors.

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


c.

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

Terminal No. (Symbol) Terminal Description Condition Specified Condition
MB-13 (GND1) - Body ground Ground Always Below 1 Ω
MB-14 (GND2) - Body ground Ground Always Below 1 Ω
MB-26 (BECU) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
MB-27 (IGR) - Body ground IG power supply Ignition switch off Below 1 V
Ignition switch ON 11 to 14 V


d.

Install the main body ECU (multiplex network body ECU).

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


e.

Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol) Terminal Description Condition Specified Condition
8F-10 - Body ground Front passenger side seat belt buckle switch signal Front passenger side seat belt fastened 11 to 14 V
Front passenger side seat belt not fastened Below 1 V
8F-26 - Body ground Passenger seat occupant detection sensor signal Ignition switch ON, front passenger seat occupied 11 to 14 V
Ignition switch ON, front passenger seat not occupied Below 1 V
8F-8 - Body ground Rear RH seat belt buckle switch signal Rear RH seat belt fastened 11 to 14 V
Rear RH seat belt not fastened Below 1 V
8F-19 - Body ground Rear LH seat belt buckle switch signal Rear LH seat belt fastened 11 to 14 V
Rear LH seat belt not fastened Below 1 V
8F-4 - Body ground Rear center seat belt buckle switch signal Rear center seat belt fastened 11 to 14 V
Rear center seat belt not fastened Below 1 V
8F-1 - Body ground Rear RH door courtesy light switch signal Rear RH side door opened Below 1 V
Rear RH side door closed 11 to 14 V or pulse output (maximum 14 V)*1
8F-28 - Body ground Rear LH door courtesy light switch signal Rear LH side door opened Below 1 V
Rear LH side door closed 11 to 14 V or pulse output (maximum 14 V)*1

*1: Differs depending on the vehicle model




CHECK COMBINATION METER ASSEMBLY


E391347N04
1.5,0.667 1.917,0.917 0.417,0.25 5.167,0.667 5.583,0.917 0.417,0.25 1.625,0.698 2.083,0.896 0.458,0.198 10 false I4 5.292,0.698 5.75,0.896 0.458,0.198 10 false I5

a.

Disconnect the I4 and I5 combination meter assembly connectors.


b.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.


Terminal No. (Symbol) Terminal Description Condition Specified Condition
I4-5 (B) - Body ground Power source for auxiliary battery Always 11 to 14 V
I4-6 (IG+) - Body ground Ignition power supply Ignition switch off Below 1 V
Ignition switch ON 10.5 to 16 V*1
11 to 14 V*2
I4-2 (ES) - Body ground Ground Always Below 1 Ω
I4-29 (DBKL) - Body ground Driver side seat belt buckle switch signal Driver side seat belt fastened 1 MΩ or higher
Driver side seat belt unfastened Below 1 Ω

*1: w/ Stop and Start System

*2: w/o Stop and Start System