RM3660EC _57 Power Source / Network _080743 NETWORKING _0600591 CXPI COMMUNICATION SYSTEM C

NETWORKING  CXPI COMMUNICATION SYSTEM  B235587  Power Distribution Box Missing Message  B235787  Wiper Module Missing Message  


DESCRIPTION

This DTC is stored when CXPI communication between the power distribution box assembly or windshield wiper relay assembly and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B235587 Power Distribution Box Missing Message No communication between power distribution box assembly and main body ECU (multiplex network body ECU) for 10 seconds or more
·

Main body ECU (multiplex network body ECU)

·

Power distribution box assembly

·

Harness or connector


Main Body
B235787 Wiper Module Missing Message No communication between windshield wiper relay assembly and main body ECU (multiplex network body ECU) for 10 seconds or more
·

Main body ECU (multiplex network body ECU)

·

Windshield wiper relay assembly

·

Harness or connector


Main Body

WIRING DIAGRAM

B678220E01
3.104,2.792 4.552,3.281 1.448,0.49 10 false Power Distribution Box Assembly 4.969,2.99 6.656,3.479 1.688,0.49 10 false Main Body ECU (Multiplex Network Body ECU) 4.969,2.802 5.313,3.063 0.344,0.26 10 false MB 4.969,1.146 5.49,1.417 0.521,0.271 10 false CXPI 4.969,1.74 5.49,2.01 0.521,0.271 10 false GND1 4.969,2.26 5.49,2.531 0.521,0.271 10 false GND2 4.677,1.635 5.021,1.896 0.344,0.26 10 false 13 4.677,2.135 5.021,2.396 0.344,0.26 10 false 14 4.698,0.979 5.042,1.24 0.344,0.26 10 false 22 2.792,0.938 3.135,1.198 0.344,0.26 10 false 9 2.729,1.146 3.073,1.406 0.344,0.26 10 false 10A 2.719,1.719 3.063,1.979 0.344,0.26 10 false 10F 2.792,1.51 3.135,1.771 0.344,0.26 10 false 1 2.469,4.938 2.813,5.198 0.344,0.26 10 false A56 3.938,4.344 4.281,4.604 0.344,0.26 10 false A55 3.948,4.917 4.292,5.177 0.344,0.26 10 false A55 3.948,5.458 4.292,5.719 0.344,0.26 10 false A55 3.438,4.344 3.958,4.615 0.521,0.271 10 false IGWS 3.615,4.906 4.135,5.177 0.521,0.271 10 false +B 3.688,5.448 4.208,5.719 0.521,0.271 10 false E 0.844,6.177 3.073,6.542 2.229,0.365 10 false : CXPI Communication Line 2.688,5.906 4.229,6.375 1.542,0.469 10 false Windshield Wiper Relay Assembly 4.604,4.49 5.26,4.729 0.656,0.24 10 false WASHER 5.667,4.333 7.146,4.688 1.479,0.354 10 false from IGP-MAIN Relay 5.667,4.896 7,5.344 1.333,0.448 10 false from WIPER Relay 2.542,4.729 2.885,4.99 0.344,0.26 10 false 4 4.01,4.135 4.354,4.396 0.344,0.26 10 false 6 4.021,4.708 4.365,4.969 0.344,0.26 10 false 8 4.021,5.26 4.365,5.521 0.344,0.26 10 false 3 2.865,4.927 3.281,5.104 0.417,0.177 10 false MPX1 1.677,0.729 2.927,1.021 1.25,0.292 10 false INP STD NO. 3 0.49,0.542 1.365,0.938 0.875,0.396 10 false from Auxiliary Battery 2.708,0.563 3.052,0.823 0.344,0.26 10 false 10B 2.781,0.365 3.125,0.625 0.344,0.26 10 false 1 3.875,0.563 4.396,0.833 0.521,0.271 10 false IC

CAUTION / NOTICE / HINT

NOTICE:
·

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

·

Do not remove or install the power distribution box assembly with the negative (-) auxiliary battery terminal connected.

·

When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

·

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

·

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

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



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


PROCEDURE

1.CLEAR DTC
a.

Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
50002 449

Result:
Result
NEXT



NEXT

2.CHECK FOR DTC
2.CHECK FOR DTC
a.

Check for DTCs.

Body Electrical > Main Body > Trouble Codes
50001 449

Result:
Result Proceed to
B235587 and B235787 are output A
DTC B235587 is output B
DTC B235787 is output C
DTC is not output D



A

3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY

B

4.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE AND BODY GROUND)

C

5.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER SOURCE AND BODY GROUND)

D

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


3.INSPECT POWER DISTRIBUTION BOX ASSEMBLY
B684982C01
1.625,0.177 2,0.427 0.375,0.25 4.656,0.427 5.031,0.677 0.375,0.25 5.688,1.302 5.51,0.948 false 0.229,0.198 0.542,0.396 0.313,0.198 10 false *a 1.698,0.219 2.01,0.417 0.313,0.198 10 false 10A 4.75,0.469 5.063,0.667 0.313,0.198 10 false MB 5.594,1.344 6.125,1.573 0.531,0.229 10 false CXPI
*a Component without harness connected
(Power Distribution Box Assembly) 		- -


a.

Remove the power distribution box assembly.

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


b.

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


c.

Disconnect the 10A power distribution box assembly connector.


d.

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

Standard Resistance
Tester Connection Condition Specified Condition
MB-22 (CXPI) - 10A-9 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>REMOVAL


NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


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

Disconnect the 10B or 10F power distribution box assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
10B-1 - Body ground Always*1
Ignition switch off*2 		11 to 14 V


*1: for Gasoline Model

*2: for HEV Model



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
10F-1 - 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 (WINDSHIELD WIPER RELAY ASSEMBLY - POWER SOURCE AND BODY GROUND)
a.

Disconnect the A55 windshield wiper relay assembly connector.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A55-6 (IGWS) - Body ground Ignition switch ON 11 to 14 V
A55-8 (+B) - Body ground Ignition switch ON or less than approximately 60 seconds after ignition switch turned off 11 to 14 V
Approximately 60 seconds or more after ignition switch turned off



c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A55-3 (E) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

6.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Turn the ignition switch off.


b.

Disconnect the cable from the negative (-) auxiliary battery terminal.


c.

Disconnect the A56 windshield wiper relay assembly connector.


d.

Disconnect the 10A power distribution box assembly connector.


e.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A56-4 (MPX1) - 10A-9 Cable disconnected from negative (-) auxiliary battery terminal Below 1 Ω
A56-4 (MPX1) or 10A-9 - Body ground Cable disconnected from negative (-) auxiliary battery terminal 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

Click hereVehicle Exterior>WIPER / WASHER>WIPER ECU>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR