- Open in CAN communication line (forward recognition camera - CAN junction connector)
- Open in CAN communication line (millimeter wave radar sensor assembly - CAN junction connector)
- CAN junction connector disconnected
- CAN junction connector
- Short in CAN communication line
- Open or short in forward recognition camera internal circuit
- Open or short in millimeter wave radar sensor assembly internal circuit
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM1000000026439 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - 11/2022] |
| Title: ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT RADAR SENSOR SYSTEM (for TMMMS Made): U010487; Lost Communication with Cruise Control Module Missing Message; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022] | ||
|
DTC |
U010487 |
Lost Communication with Cruise Control Module Missing Message |
DESCRIPTION
The millimeter wave radar sensor assembly communicates with the forward recognition camera via CAN communication.
If a communication error is detected between the forward recognition camera and millimeter wave radar sensor assembly, the millimeter wave radar sensor assembly stores this DTC.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
|---|---|---|---|---|
|
U010487 |
Lost Communication with Cruise Control Module Missing Message |
Detection condition:
Malfunction status:
Malfunction duration:
|
|
Front Radar Sensor |
|
Pattern |
DTC output part name (Display on GTS) |
Suspected Area (Malfunction Status) |
|
|---|---|---|---|
|
Millimeter Wave Radar Sensor Assembly (Front Radar Sensor) |
Forward Recognition Camera (Pre-Collision System) |
||
|
U010487 |
U023587 |
||
|
○: DTC is output.
-: DTC is not output |
|||
|
Pattern 1 |
○ |
○ |
|
|
Pattern 2 |
○ |
- |
|
HINT:
If the DTCs are output simultaneously, the inspection area can be narrowed down.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
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 here
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY](/t3Portal/stylegraphics/info.gif)
- When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.
-
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the millimeter wave radar sensor beam axis must be performed.
Click here
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, forward recognition camera adjustment must be performed.
HINT:
Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition.
One Time Recognition: Click here
Sequential Recognition: Click here
PROCEDURE
|
1. |
CHECK FOR DTCs |
(a) Check for pre-collision system DTCs.
Body Electrical > Pre-Collision System > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC U023587 is output |
A |
|
DTC U023587 is not output |
B |
| B |
|
|
|
2. |
CHECK CAN BUS LINES |
(a) Disconnect the T9 forward recognition camera connector.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to Forward Recognition Camera) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T9-6 (CANH) - T9-12 (CANL) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132Ω |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T9-6 (CANH) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
T9-12 (CANL) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
T9-6 (CANH) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
T9-12 (CANL) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
(d) Connect the T9 forward recognition camera connector.
| OK |
|
|
|
3. |
CHECK CAN BUS LINES |
(a) Disconnect the A1 millimeter wave radar sensor assembly connector.
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) |
- |
- |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A1-5 (CA1P) - A1-6 (CA1N) |
Cable disconnected from negative (-) auxiliary battery terminal |
108 to 132Ω |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A1-5 (CA1P) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
A1-6 (CA1N) - I26-4 (CG) |
Cable disconnected from negative (-) auxiliary battery terminal |
200 Ω or higher |
|
A1-5 (CA1P) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
|
A1-6 (CA1N) - I26-16 (BAT) |
Cable disconnected from negative (-) auxiliary battery terminal |
6 kΩ or higher |
(d) Connect the A1 millimeter wave radar sensor assembly connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BUS MAIN LINE OR CONNECTOR |
|
4. |
CHECK CONNECTOR (FORWARD RECOGNITION CAMERA) |
(a) Check the locking part and terminals of the forward recognition camera connector.
NOTICE:
- Make sure the connector is not loose or disconnected.
- Make sure that the connector and terminals are not deformed or corroded.
OK:
The connector and terminals are normal.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT) |
|
|
5. |
CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT) |
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
|
(b) Disconnect the T9 forward recognition camera connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T9-10 (GND) - Body ground |
Always |
Below 1 Ω |
(d) Connect the cable to the negative (-) auxiliary battery terminal.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T9-7 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(f) Connect the T9 forward recognition camera connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (FORWARD RECOGNITION CAMERA POWER SOURCE CIRCUIT) |
|
|
6. |
INSPECT FORWARD RECOGNITION CAMERA (WAVEFORM) |
(a) Turn the ignition switch off.
(b) Disconnect the A1 millimeter wave radar sensor assembly connector.
(c) Turn the ignition switch to ON.
(d) Using an oscilloscope, measure the waveform at A1 millimeter wave radar sensor assembly connector..
|
*a |
Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) |
*b |
Waveform |
Measurement Condition:
|
Tester Connection |
Condition |
Tool Setting |
|---|---|---|
|
A1-5 (CA1P) - Body ground |
Ignition switch ON |
1 V/DIV., 100 μs/DIV. |
NOTICE:
The oscilloscope waveform is for reference only and does not include noise, fluctuations, etc.
OK:
A waveform similar to that in the illustration can be observed.
(e) Connect the A1 millimeter wave radar sensor assembly connector.
| OK |
|
| NG |
|
|
|