Toyota Corolla Cross: DCM Data Signal Circuit between Radio Receiver and DCM
DESCRIPTION
This circuit is used to send and receive signals between the DCM (telematics transceiver) and the radio and display receiver assembly.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the I253 and t5 radio and display receiver assembly.
(b) Disconnect the I200 and t1 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
t5-1 (USB+) - t1-2 (USB+) |
Always |
Below 1 Ω |
|
t5-2 (USB-) - t1-1 (USB-) |
Always |
Below 1 Ω |
|
t5-3 (USBS) - t1-3 (USBS) |
Always |
Below 1 Ω |
|
I253-18 (USBV) - I200-15 (USBV) |
Always |
Below 1 Ω |
|
I253-17 (USBG) - I200-31 (USBG) |
Always |
Below 1 Ω |
|
I253-15 (VOR+) - I200-17 (VOT+) |
Always |
Below 1 Ω |
|
I253-16 (VOR-) - I200-33 (VOT-) |
Always |
Below 1 Ω |
|
t5-1 (USB+) - Body ground |
Always |
10 kΩ or higher |
|
t5-2 (USB-) - Body ground |
Always |
10 kΩ or higher |
|
t5-3 (USBS) - Body ground |
Always |
10 kΩ or higher |
|
I253-18 (USBV) - Body ground |
Always |
10 kΩ or higher |
|
I253-17 (USBG) - Body ground |
Always |
10 kΩ or higher |
|
I253-15 (VOR+) - Body ground |
Always |
10 kΩ or higher |
|
I253-16 (VOR-) - Body ground |
Always |
10 kΩ or higher |
|
I253-4 (SGND) - Body ground |
Always |
10 kΩ or higher |
| OK | .gif)
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
Warning Notification Function Malfunction
PROCEDURE
1.
CHECK PROBLEM SYMPTOM (WARNING NOTIFICATION FUNCTION)
(a) Check the problem symptom.
(1) Check the problem symptom of the warning notification function.
Remote Service Malfunction
PROCEDURE
1.
CHECK CAN COMMUNICATION SYSTEM
(a) Enter the following menus: Bus Check.
for HEV Model:
Click here
for Gasoline Model:
Click here
(b)
Brake
h1 {color:red;} h2 {color:blue;} h3 {color:green;}
SEE MORE:
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART
AUDIO AND VISUAL SYATEM
DTC No.
Detection Item
Link
B154711
GNSS Antenna Circuit Short to Ground
B154713
GNSS Antenna Circuit Open
B1549
IG Circuit Short to Ground or Open (B242E14)
DESCRIPTION The headlight ECU sub-assembly operates using the power source voltage input from the IGR terminal and ECUB terminal.
The IG terminal power source voltage is supplied by turning the IGR-NO.1 relay to ON.
The headlight ECU sub-assembly receives ignition switch ON signals from the main b
