Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM10000000295S3 |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: NETWORKING: CXPI COMMUNICATION SYSTEM: B235587,B235787-B235987; Power Distribution Box Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] |
DTC
|
B235587
|
Power Distribution Box Missing Message
|
DTC
|
B235787
|
Wiper Module Missing Message
|
DTC
|
B235887
|
Smart LDM Left Missing Message
|
DTC
|
B235987
|
Smart LDM Right Missing Message
|
DESCRIPTION
This DTC is stored when CXPI communication between the power distribution box assembly, windshield wiper relay assembly, headlight unit assembly LH* or headlight unit assembly RH* and main body ECU (multiplex network body ECU) stops for 10 seconds or more.
-
*: for LED Type Turn Signal Light
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
|
B235887
|
Smart LDM Left Missing Message
|
No communication between headlight unit assembly LH and main body ECU (multiplex network body ECU) for 10 seconds or more*
|
-
Main body ECU (multiplex network body ECU)
-
Power distribution box assembly
-
Headlight unit assembly LH
-
Harness or connector
|
Main Body
|
B235987
|
Smart LDM Right Missing Message
|
No communication between headlight unit assembly RH and main body ECU (multiplex network body ECU) for 10 seconds or more*
|
-
Main body ECU (multiplex network body ECU)
-
Power distribution box assembly
-
Headlight unit assembly RH
-
Harness or connector
|
Main Body
|
-
*: for LED Type Turn Signal Light
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.
Click here
PROCEDURE
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
NEXT
|
|
|
(a) Check for DTCs.
Body Electrical > Main Body > Trouble Codes
Result
|
Proceed to
|
B235587, B235787, B235887* and B235987* are output
|
A
|
B235787, B235887 and B235987 are output*
|
B
|
DTC B235587 is output
|
C
|
DTC B235787 is output
|
D
|
DTC B235887* is output
|
E
|
DTC B235987* is output
|
F
|
DTC is not output
|
G
|
A
|
|
|
3.
|
INSPECT POWER DISTRIBUTION BOX ASSEMBLY
|
*a
|
Component without harness connected
(Power Distribution Box Assembly)
|
-
|
-
|
(a) Remove the power distribution box assembly.
Click here
(b) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
(c) Disconnect the 8F 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 (CXP1) - 8F-9
|
Always
|
Below 1 Ω
|
4.
|
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - WINDSHIELD WIPER RELAY ASSEMBLY)
|
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the 8F power distribution box assembly connector.
(c) Disconnect the A56 windshield wiper relay assembly connector.
(d) Disconnect the A133*2 or A171*3 headlight unit assembly RH connector.*1
(e) Disconnect the A131*2 or A170*3 headlight unit assembly LH connector.*1
-
*1: for LED Type Turn Signal Light
*2: except G16E-GTS
*3: for G16E-GTS
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
8F-9 - A56-4 (MPX1)
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
8F-9 or A56-4 (MPX1) - Body ground
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
5.
|
CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - POWER SOURCE AND BODY GROUND)
|
(a) Disconnect the 8D or 8K 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
|
8K-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
|
8D-1 - Body ground
|
Always
|
Below 1 Ω
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
6.
|
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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
7.
|
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 8F 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) - 8F-9
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
A56-4 (MPX1) or 8F-9 - Body ground
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
8.
|
CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY LH - POWER SOURCE AND BODY GROUND)
|
(a) Disconnect the A131*1 or A170*2 headlight unit assembly LH connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
A131-2 (LO) - Body ground*1
|
Taillight on
|
9.5 to 14 V
|
Taillight off
|
Below 1 V
|
A170-2 (LO) - Body ground*2
|
Taillight on
|
9.5 to 14 V
|
Taillight off
|
Below 1 V
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
A131-5 (E) - Body ground*1
|
Always
|
Below 1 Ω
|
A170-5 (E) - Body ground*2
|
Always
|
Below 1 Ω
|
-
*1: except G16E-GTS
*2: for G16E-GTS
Result
|
Proceed to
|
OK
|
A
|
NG (except G16E-GTS)
|
B
|
NG (for G16E-GTS)
|
C
|
A
|
|
|
9.
|
CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY)
|
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) auxiliary battery terminal.
(c) Disconnect the 8F 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
|
A131-1 (AT1) - 8F-9*1
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
A131-1 (AT1) or 8F-9 - Body ground*1
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
A170-1 (AT1) - 8F-9*2
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
A170-1 (AT1) or 8F-9 - Body ground*2
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
-
*1: except G16E-GTS
*2: for G16E-GTS
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
10.
|
INSPECT H-LP LH RELAY
|
Click here
NG |
|
REPLACE H-LP LH RELAY
|
OK
|
|
|
11.
|
CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT UNIT ASSEMBLY LH)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
3 (H-LP LH relay) - A131-2 (LO)*1
|
Always
|
Below 1 Ω
|
3 (H-LP LH relay) or A131-2 (LO) - Body ground*1
|
Always
|
10 kΩ or higher
|
3 (H-LP LH relay) - A170-2 (LO)*2
|
Always
|
Below 1 Ω
|
3 (H-LP LH relay) or A170-2 (LO) - Body ground*2
|
Always
|
10 kΩ or higher
|
-
*1: except G16E-GTS
*2: for G16E-GTS
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
12.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP LH RELAY)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
2 (H-LP LH relay) - Body ground
|
Always*1
Ignition switch off*2
|
11 to 14 V
|
5 (H-LP LH relay) - Body ground
|
Always*1
Ignition switch off*2
|
11 to 14 V
|
-
*1: for Gasoline Model
-
*2: for HEV Model
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
13.
|
CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
|
(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
|
1 (H-LP LH relay) - 8F-3
|
Always
|
Below 1 Ω
|
1 (H-LP LH relay) or 8F-3 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
14.
|
INSPECT POWER DISTRIBUTION BOX ASSEMBLY
|
*a
|
Component without harness connected
(Power Distribution Box Assembly)
|
-
|
-
|
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
8F-3 - MB-8 (HRLY)
|
Always
|
Below 1 Ω
|
15.
|
INSPECT NO. 1 INTEGRATION RELAY
|
(a) Remove the No. 1 integration relay.
Click here
(b) Inspect the No. 1 integration relay.
Click here
OK
|
|
|
16.
|
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - HEADLIGHT UNIT ASSEMBLY LH)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
9B-1 - A170-2 (LO)
|
Always
|
Below 1 Ω
|
9B-1 or A170-2 (LO) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
17.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE - NO. 1 INTEGRATION RELAY)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
9A-5 - Body ground
|
Always*1
Ignition switch off*2
|
11 to 14 V
|
-
*1: for Gasoline Model
-
*2: for HV Model
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
18.
|
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
|
(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
|
9B-2 - 8F-3
|
Always
|
Below 1 Ω
|
9B-2 or 8F-3 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
19.
|
INSPECT POWER DISTRIBUTION BOX ASSEMBLY
|
*a
|
Component without harness connected
(Power Distribution Box Assembly)
|
-
|
-
|
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
8F-3 - MB-8 (HRLY)
|
Always
|
Below 1 Ω
|
20.
|
CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY RH - POWER SOURCE)
|
(a) Disconnect the A133*1 or A171*2 headlight unit assembly RH connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
A133-2 (LO) - Body ground*1
|
Taillight on
|
9.5 to 14 V
|
Taillight off
|
Below 1 V
|
A171-2 (LO) - Body ground*2
|
Taillight on
|
9.5 to 14 V
|
Taillight off
|
Below 1 V
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
A133-5 (E) - Body ground*1
|
Always
|
Below 1 Ω
|
A171-5 (E) - Body ground*2
|
Always
|
Below 1 Ω
|
-
*1: except G16E-GTS
*2: for G16E-GTS
Result
|
Proceed to
|
OK
|
A
|
NG (except G16E-GTS)
|
B
|
NG (for G16E-GTS)
|
C
|
A
|
|
|
21.
|
CHECK HARNESS AND CONNECTOR (HEADLIGHT UNIT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY)
|
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) auxiliary battery terminal.
(c) Disconnect the 8F 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
|
A133-1 (AS1) - 8F-9*1
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
A133-1 (AS1) or 8F-9 - Body ground*1
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
A171-1 (AS1) - 8F-9*2
|
Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
A171-1 (AS1) or 8F-9 - Body ground*2
|
Cable disconnected from negative (-) auxiliary battery terminal
|
10 kΩ or higher
|
-
*1: except G16E-GTS
*2: for G16E-GTS
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
22.
|
INSPECT H-LP RH RELAY
|
Click here
NG |
|
REPLACE H-LP RH RELAY
|
OK
|
|
|
23.
|
CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT UNIT ASSEMBLY RH)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
3 (H-LP RH relay) - A133-2 (LO)*1
|
Always
|
Below 1 Ω
|
3 (H-LP RH relay) or A133-2 (LO) - Body ground*1
|
Always
|
10 kΩ or higher
|
3 (H-LP RH relay) - A171-2 (LO)*2
|
Always
|
Below 1 Ω
|
3 (H-LP RH relay) or A171-2 (LO) - Body ground*2
|
Always
|
10 kΩ or higher
|
-
*1: except G16E-GTS
*2: for G16E-GTS
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
24.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP RH RELAY)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
2 (H-LP RH relay) - Body ground
|
Ignition switch off
|
11 to 14 V
|
5 (H-LP RH relay) - Body ground
|
Ignition switch off
|
11 to 14 V
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
25.
|
CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
|
(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
|
1 (H-LP RH relay) - 8F-4
|
Always
|
Below 1 Ω
|
1 (H-LP RH relay) or 8F-4 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
26.
|
INSPECT POWER DISTRIBUTION BOX ASSEMBLY
|
*a
|
Component without harness connected
(Power Distribution Box Assembly)
|
-
|
-
|
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
8F-4 - MB-9 (HRY2)
|
Always
|
Below 1 Ω
|
27.
|
INSPECT NO. 1 INTEGRATION RELAY
|
(a) Remove the No. 1 integration relay.
Click here
(b) Inspect the No. 1 integration relay.
Click here
OK
|
|
|
28.
|
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - HEADLIGHT UNIT ASSEMBLY RH)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
9A-12 - A171-2 (LO)
|
Always
|
Below 1 Ω
|
9A-12 or A171-2 (LO) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
29.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE - NO. 1 INTEGRATION RELAY)
|
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
9B-8 - Body ground
|
Always*1
Ignition switch off*2
|
11 to 14 V
|
-
*1: for Gasoline Model
-
*2: for HV Model
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
30.
|
CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - POWER DISTRIBUTION BOX ASSEMBLY)
|
(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
|
9A-11 - 8F-4
|
Always
|
Below 1 Ω
|
9A-11 or 8F-4 - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
31.
|
INSPECT POWER DISTRIBUTION BOX ASSEMBLY
|
*a
|
Component without harness connected
(Power Distribution Box Assembly)
|
-
|
-
|
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
8F-4 - MB-9 (HRY2)
|
Always
|
Below 1 Ω
|
|