RM38T0EC _59 Vehicle Exterior _114146 WIPER / WASHER _0510034 WIPER AND WASHER SYSTEM C

WIPER / WASHER  WIPER AND WASHER SYSTEM  B235787  Wiper Module Missing Message  


DESCRIPTION

The main body ECU (multiplex network body ECU) and windshield wiper relay assembly communicate via CXPI communication. The main body ECU (multiplex network body ECU) stores this DTC if communication becomes abnormal.

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from
B235787 Wiper Module Missing Message
Detection condition:

Auxiliary battery voltage is 9.5 V or more


Malfunction Status:

Communication malfunction between the main body ECU (multiplex network body ECU) and windshield wiper relay assembly


Malfunction Time:

10 seconds or more


·

Windshield wiper relay assembly

·

Main body ECU (multiplex network body ECU)

·

Harness or connector

·

WIPER relay

·

Power distribution box assembly


○ Main Body

WIRING DIAGRAM

E475885E01
5.438,3.688 7.083,4.25 1.646,0.563 10 false Main Body ECU (Multiplex Network Body ECU) 3.615,3.396 5.031,3.906 1.417,0.51 10 false Power Distribution Box Assembly 0.844,5.292 4.667,5.49 3.823,0.198 10 false : CXPI Communication Line 2.969,1.802 3.74,2 0.771,0.198 10 false WIPER 3.979,1.135 4.75,1.333 0.771,0.198 10 false WIPER 2.958,0.188 4.479,0.563 1.521,0.375 10 false from Auxiliary Battery 0.542,4.5 1.667,4.875 1.125,0.375 10 false Windshield Wiper Relay Assembly 6.135,0.823 6.448,1.021 0.313,0.198 10 false IG 6.5,0.833 6.813,1.031 0.313,0.198 10 false B 1.396,0.948 1.708,1.146 0.313,0.198 10 false +B 1.24,2.823 1.74,3.021 0.5,0.198 10 false MPX1 1.49,3.417 1.99,3.615 0.5,0.198 10 false E 1.385,4.01 1.885,4.208 0.5,0.198 10 false ES 1.708,0.958 2.208,1.156 0.5,0.198 10 false A55 1.719,3.427 2.219,3.625 0.5,0.198 10 false A55 1.708,4.021 2.208,4.219 0.5,0.198 10 false A56 1.708,2.823 2.208,3.021 0.5,0.198 10 false A56 1.813,0.75 2.125,0.948 0.313,0.198 10 false 8 1.813,2.604 2.125,2.802 0.313,0.198 10 false 4 1.813,3.219 2.125,3.417 0.313,0.198 10 false 3 1.813,3.813 2.125,4.01 0.313,0.198 10 false 5 2.708,0.844 3.021,1.042 0.313,0.198 10 false 3 3.583,0.833 3.896,1.031 0.313,0.198 10 false 5 2.708,1.313 3.021,1.51 0.313,0.198 10 false 1 3.583,1.323 3.896,1.521 0.313,0.198 10 false 2 3.281,2.833 3.594,3.031 0.313,0.198 10 false 8E 5.167,2.833 5.479,3.031 0.313,0.198 10 false MB 5.198,2.615 5.51,2.813 0.313,0.198 10 false 22 5.177,1.427 5.49,1.625 0.313,0.198 10 false I85 3.333,2.615 3.646,2.813 0.313,0.198 10 false 5 5.219,1.229 5.531,1.427 0.313,0.198 10 false 6 5.521,2.833 6.167,3.083 0.646,0.25 10 false CXPI 5.531,1.323 6.177,1.573 0.646,0.25 10 false WPS

CAUTION / NOTICE / HINT

NOTICE:
·

Inspect the fuses of 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.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - POWER DISTRIBUTION BOX ASSEMBLY)
a.

Disconnect the A56 windshield wiper relay assembly connector.


b.

Disconnect the 8E 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
A56-4 (MPX1) - 8E-5 Always Below 1 Ω
A56-4 (MPX1) or 8E-5 - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

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


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
8E-5 - MB-22 (CXPI) Always Below 1 Ω
8E-5 or MB-22 (CXPI) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

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


3.CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
E477663C02
1.458,0.542 1.885,0.844 0.427,0.302 1.99,1.781 2.469,1.594 true 1.552,0.604 2.01,0.802 0.458,0.198 10 false A56 2.531,1.479 3.146,1.677 0.615,0.198 10 false MPX1 0.469,0.51 0.927,0.708 0.458,0.198 10 false *a
*a Front view of wire harness connector
(to Windshield Wiper Relay Assembly)


a.

Connect the 8E power distribution box assembly connector


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
A56-4 (MPX1) - Body ground Ignition switch ON Pulse generation
A56-4 (MPX1) - Body ground Ignition switch off 11 to 14 V



Result:
Proceed to
OK
NG



OK

4.PERFORM ACTIVE TEST USING GTS

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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


4.PERFORM ACTIVE TEST USING GTS
a.

Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test
Tester Display Measurement Item Control Range Diagnostic Note
Wiper Power Relay Function to operate the WIPER relay OFF or ON -
Body Electrical > Main Body > Active Test
Tester Display
Wiper Power Relay
50004 449 70
OK:

WIPER relay operates normally.



Result:
Proceed to
OK
NG



OK

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

NG

10.INSPECT WIPER RELAY
5.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - BODY GROUND)
a.

Disconnect the A55 windshield wiper relay assembly connectors.


b.

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
A56-5 (ES) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.CHECK HARNESS AND CONNECTOR (POWER SOURCE - WINDSHIELD WIPER RELAY ASSEMBLY)
B416369C82
1.573,0.302 2.01,0.531 0.438,0.229 2.167,1.417 2.583,1.167 true 0.135,0.104 0.448,0.302 0.313,0.198 10 false *a 2.604,1 2.917,1.198 0.313,0.198 10 false +B 1.667,0.323 2.125,0.521 0.458,0.198 10 false A55
*a Front view of wire harness connector
(to Windshield Wiper Relay Assembly)


a.

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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
A55-8 (+B) - Body ground Ignition switch ON 11 to 14 V
Less than approximately 60 seconds after ignition switch turned off 11 to 14 V
Approximately 60 seconds or more after ignition switch turned off Below 1 V



Result:
Proceed to
OK
NG



OK

REPLACE WINDSHIELD WIPER RELAY ASSEMBLY

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


NG

7.INSPECT WIPER RELAY
7.INSPECT WIPER RELAY
a.

Remove the WIPER relay.


b.
E226254C11
2.094,0.76 2.323,0.76 true 2.885,0.76 3.115,0.76 true 2.781,1.115 3.115,1.115 true 2.792,1.563 3.115,1.563 true 1.969,0.698 2.219,0.938 0.25,0.24 10 false 1 3.167,1.063 3.333,1.24 0.167,0.177 10 false 5 3.167,1.49 3.323,1.708 0.156,0.219 10 false 3 3.146,0.688 3.354,0.917 0.208,0.229 10 false 2 0.156,0.115 0.469,0.313 0.313,0.198 10 false *a
*a Component without harness connected
(Windshield Wiper Relay)


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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω



Result:
Proceed to
OK
NG



OK

8.CHECK HARNESS AND CONNECTOR (POWER SOURCE - WIPER RELAY)

NG

REPLACE WIPER RELAY

8.CHECK HARNESS AND CONNECTOR (POWER SOURCE - WIPER RELAY)
a.
E462833C01
0.51,0.885 0.938,1.083 false 0.333,0.781 0.646,0.938 0.313,0.156 10 false *a 0.115,0.063 0.427,0.26 0.313,0.198 10 false *1
*1 No. 1 Engine Room Relay Block
*a WIPER Relay Holder


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

Standard Voltage:
Tester Connection Switch Condition Specified Condition
WIPER relay holder terminal 5 - Body ground Ignition OFF 11 to 14 V



Result:
Proceed to
OK
NG



OK

9.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - WIPER RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - WIPER RELAY)
a.

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

Standard Resistance:
Tester Connection Condition Specified Condition
A55-8 (+B) - WIPER relay holder terminal 3 Always Below 1 Ω
A55-8 (+B) - Body ground Always 10 kΩ or higher



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

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.INSPECT WIPER RELAY
a.

Remove the WIPER relay.


b.
E226254C11
2.094,0.76 2.323,0.76 true 2.885,0.76 3.115,0.76 true 2.781,1.115 3.115,1.115 true 2.792,1.563 3.115,1.563 true 1.969,0.698 2.219,0.938 0.25,0.24 10 false 1 3.167,1.063 3.333,1.24 0.167,0.177 10 false 5 3.167,1.49 3.323,1.708 0.156,0.219 10 false 3 3.146,0.688 3.354,0.917 0.208,0.229 10 false 2 0.156,0.115 0.469,0.313 0.313,0.198 10 false *a
*a Component without harness connected
(Windshield Wiper Relay)


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

Standard Resistance:
Tester Connection Condition Specified Condition
3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher
Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω



Result:
Proceed to
OK
NG



OK

11.CHECK HARNESS AND CONNECTOR (WIPER RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

NG

REPLACE WIPER RELAY

11.CHECK HARNESS AND CONNECTOR (WIPER RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))
a.

Disconnect the I85 main body ECU (multiplex network body ECU) connector.


b.

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

Standard Resistance:
Tester Connection Condition Specified Condition
WIPER relay holder terminal 2 - I85-6 (WPS) Always Below 1 Ω
WIPER relay holder terminal 2 or I85-6 (WPS) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

12.CHECK HARNESS AND CONNECTOR (BODY GROUND - WIPER RELAY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

12.CHECK HARNESS AND CONNECTOR (BODY GROUND - WIPER RELAY)
a.
E462833C01
0.51,0.885 0.938,1.083 false 0.333,0.781 0.646,0.938 0.313,0.156 10 false *a 0.115,0.063 0.427,0.26 0.313,0.198 10 false *1
*1 No. 1 Engine Room Relay Block
*a WIPER Relay Holder


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

Standard Resistance:
Tester Connection Condition Specified Condition
WIPER relay holder terminal 1 - Body ground 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

REPAIR OR REPLACE HARNESS OR CONNECTOR