| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000012W24 |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [03/2017 - 10/2020] |
| Title: PRE-COLLISION: PRE-COLLISION SYSTEM: U1002; Lost Communication with Gateway Module; 2018 - 2020 MY Camry [03/2017 - 10/2020] | ||
|
DTC |
U1002 |
Lost Communication with Gateway Module |
DESCRIPTION
DTC U1002 is stored when the millimeter wave radar sensor assembly cannot receive signals from the forward recognition camera.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U1002 |
Lost Communication with Gateway Module |
After the ignition switch is turned to ON, communication between the millimeter wave radar sensor assembly and forward recognition camera is abnormal for 2 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
-
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
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![2018 MY Camry [03/2017 - 06/2017]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION](/t3Portal/stylegraphics/info.gif)
- 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. As a result, a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.
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- 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. As a result, a DTC may be stored.
-
If the millimeter wave radar sensor assembly has been replaced, be sure to perform millimeter wave radar sensor assembly adjustment.
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HINT:
- Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
- When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
|
1. |
CHECK CAN BUS LINE (MALFUNCTION CONFIRMATION) |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal.
|
(c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (Open circuit in CAN bus line) |
B |
|
NG (Short circuit between CAN bus lines) |
C |
|
NG (Short to +B or ground) |
D |
| B |
|
| C |
|
| D |
|
|
|
2. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Body Electrical > Pre-Collision 2 > Clear DTCs
(b) Perform the following procedure.
HINT:
If the following procedure is not performed, the previously output DTC cannot be detected.
- Turn the ignition switch to ON and wait 2 seconds or more.
(c) Check for DTCs.
Body Electrical > Pre-Collision 2 > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC U1002 is not output |
A |
|
DTC U1002 is output |
B |
| A |
|
USE SIMULATION METHOD TO CHECK
|
| B |
|
|
3. |
CHECK FOR OPEN IN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA) |
(a) Disconnect the V6 forward recognition camera connector.
(b) Disconnect the A30 millimeter wave radar sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-6 (CANH) - A30-5 (CA1P) |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
|
V6-12 (CANL) - A30-6 (CA1N) |
Cable disconnected from negative (-) battery terminal |
Below 1 Ω |
(d) Connect the A30 millimeter wave radar sensor assembly connector.
(e) Connect the V6 forward recognition camera connector.
| NG |
|
REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA) |
|
|
4. |
CHECK FOR OPEN IN CAN BUS LINES (FORWARD RECOGNITION CAMERA) |
|
(a) Disconnect the V6 forward recognition camera connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-6 (CANH) - V6-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
(c) Connect the V6 forward recognition camera connector.
| OK |
|
| NG |
|
|
5. |
CHECK FOR SHORT BETWEEN CAN BUS LINES (FORWARD RECOGNITION CAMERA) |
|
(a) Disconnect the V6 forward recognition camera connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-6 (CANH) - V6-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
(c) Connect the V6 forward recognition camera connector.
| OK |
|
|
|
6. |
CHECK FOR SHORT BETWEEN CAN BUS LINES (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) |
|
(a) Disconnect the A30 millimeter wave radar sensor assembly connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A30-5 (CA1P) - A30-6 (CA1N) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
(c) Connect the A30 millimeter wave radar sensor assembly connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA) |
|
7. |
CHECK FOR SHORT IN CAN BUS LINE (FORWARD RECOGNITION CAMERA) |
(a) Disconnect the V6 forward recognition camera connector.
|
*A |
Before Jul. 2018 Production |
*B |
From Jul. 2018 Production |
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to Forward Recognition Camera) |
- |
- |
(b) Before Jul. 2018 Production:
Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-6 (CANH) - K68-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
V6-12 (CANL) - K68-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
V6-6 (CANH) - K68-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
V6-12 (CANL) - K68-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
(c) From Jul. 2018 Production:
Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
V6-6 (CANH) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
V6-12 (CANL) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
V6-6 (CANH) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
V6-12 (CANL) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
(d) Connect the V6 forward recognition camera connector.
| OK |
|
|
|
8. |
CHECK FOR SHORT IN CAN BUS LINE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY) |
(a) Disconnect the A30 millimeter wave radar sensor assembly connector.
|
*A |
Before Jul. 2018 Production |
*B |
From Jul. 2018 Production |
|
*1 |
DLC3 |
- |
- |
|
*a |
Front view of wire harness connector (to Millimeter Wave Radar Sensor Assembly) |
- |
- |
(b) Before Jul. 2018 Production:
Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A30-5 (CA1P) - K68-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
A30-6 (CA1N) - K68-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
A30-5 (CA1P) - K68-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
A30-6 (CA1N) - K68-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
(c) From Jul. 2018 Production:
Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A30-5 (CA1P) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
A30-6 (CA1N) - K138-4 (CG) |
Cable disconnected from negative (-) battery terminal |
200 Ω or higher |
|
A30-5 (CA1P) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
|
A30-6 (CA1N) - K138-16 (BAT) |
Cable disconnected from negative (-) battery terminal |
6 kΩ or higher |
(d) Connect the A30 millimeter wave radar sensor assembly connector.
| OK |
|
| NG |
|
REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - FORWARD RECOGNITION CAMERA) |
|
|