RM38T0EC _57 Power Source / Network _104409 NETWORKING _0479614 CXPI COMMUNICATION SYSTEM U

NETWORKING  CXPI COMMUNICATION SYSTEM  TERMINALS OF ECU  


NOTICE:
·

After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY

·

When disconnecting the cable from the negative (-) auxiliary battery terminal while performing repairs, some systems need to be initialized after the cable is reconnected.

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART




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


a.

Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

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

E469803C06
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 I86 2.229,1.813 2.688,2.01 0.458,0.198 10 false I85 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.

Connect 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 Switch Condition Specified Condition
MB-13 (GND1) - Body ground Ground Always Below 1 Ω
MB-14 (GND2) - Body ground
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 Switch Condition Specified Condition
8E-5 - Body ground CXPI communication line Ignition switch ON Pulse generation
8F-43 - Body ground Rear window defogger signal (output) Rear window defogger switch off Below 1.5 V
Rear window defogger switch on 8 to 14 V
8B-2 - Body ground Mirror heater drive signal (output) Rear window defogger switch off Below 1.5 V
Rear window defogger switch on 8 to 14 V