DESCRIPTION
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
---|---|---|---|
U1002 |
Lost Communication with Gateway Module |
When the ignition switch is ON, a communication error between the forward recognition camera and millimeter wave radar sensor assembly is detected for approximately 0.3 seconds. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
PROCEDURE
1. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC U023A and/or U1002 and other DTCs are output |
A |
Only DTC U023A and/or U1002 is output |
B |
A | ![]() |
GO TO DIAGNOSTIC TROUBLE CODE CHART |
|
2. |
CHECK FOR OPEN IN CAN BUS SUB LINES (FORWARD RECOGNITION CAMERA) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the forward recognition camera connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R5-6 (CANH) - R5-12 (CANL) |
Cable disconnected from negative (-) battery terminal |
108 to 132 Ω |
(d) Connect the forward recognition camera connector.
NG | ![]() |
REPAIR OR REPLACE CAN BUS SUB LINE OR CONNECTOR (FORWARD RECOGNITION CAMERA - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) |
|
3. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE (FORWARD RECOGNITION CAMERA)) |
(a) Disconnect the forward recognition camera connector. |
|
(b) Connect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
R5-7 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(d) Connect the forward recognition camera connector.
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
4. |
CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA - BODY GROUND) |
(a) Disconnect the forward recognition camera connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
R5-10 (GND) - Body ground |
Always |
Below 1 Ω |
(c) Connect the forward recognition camera connector.
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE (MILLIMETER WAVE RADAR SENSOR ASSEMBLY)) |
(a) Disconnect the millimeter wave radar sensor assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
A2-8 (IGB) - Body ground |
Ignition switch ON |
11 to 14 V |
(c) Connect the millimeter wave radar sensor assembly connector.
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
6. |
CHECK HARNESS AND CONNECTOR (MILLIMETER WAVE RADAR SENSOR ASSEMBLY - BODY GROUND) |
(a) Disconnect the 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 |
---|---|---|
A2-1 (SGND) - Body ground |
Always |
Below 1 Ω |
(c) Connect the millimeter wave radar sensor assembly connector.
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
REPLACE FORWARD RECOGNITION CAMERA |
(a) Replace the forward recognition camera.
Click here
(b) Perform forward recognition axis adjustment.
Click here
|
8. |
CHECK FOR DTCs (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Click here
Result |
Proceed to |
---|---|
DTC U023A is not output |
A |
DTC U023A is output |
B |
A | ![]() |
END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) |
|
9. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
(a) Replace the millimeter wave radar sensor assembly.
Click here
(b) Adjust the millimeter wave radar sensor assembly.
Click here
|
10. |
CLEAR DTC (PRE-COLLISION SYSTEM) |
(a) Clear the DTCs.
Click here
NEXT | ![]() |
END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) |
Toyota CH-R Service Manual > Rear View Monitor System: Terminals Of Ecu
TERMINALS OF ECU
REAR TELEVISION CAMERA ASSEMBLY
(a) Disconnect the S11 rear television camera assembly connector.
(b) Measure the voltage of each terminal of the wire harness side connector.
Terminal No. (Symbol)
Wiring Color
Terminal Description
Co ...
Toyota CH-R Service Manual > Navigation System: Certification ECU Vehicle Information Reading/Writing Process Malfunction (B15F7)
DESCRIPTION
This DTC is stored when items controlled by the certification ECU (smart key
ECU assembly) cannot be customized via the navigation system vehicle customization
screen.
HINT:
The certification ECU (smart key ECU assembly) controls the smart key system
related items that are custo ...