Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM100000001N27R |
Model Year Start: 2021 |
Model: GR Corolla |
Prod Date Range: [04/2020 - 11/2022] |
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B15DB; Telematics Transceiver Disconnected; 2021 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 11/2022] |
DTC
|
B15DB
|
Telematics Transceiver Disconnected
|
DESCRIPTION
If the radio and display receiver assembly cannot detect the DCM (telematics transceiver) for a certain period of time (90 seconds) after the ignition switch is turned to ACC and the radio and display receiver assembly confirms that the information is missing by checking past DCM (telematics transceiver) recognition information (registered information), this DTC will be stored.
The telematics system uses USB communication between devices. If an open, short, short to +B or short to ground occurs in the USB circuit, communication is interrupted and the telematics system will not operate normally.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
B15DB
|
Telematics Transceiver Disconnected
|
DCM (telematics transceiver) disconnected
|
-
DCM (telematics transceiver)
-
DCM (telematics transceiver) power source circuit
-
Radio and display receiver assembly
-
Navigation ECU
-
Harness or connector
|
HINT:
This DTC may be stored due to environmental reasons such as electrical noise or interference.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
(a) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(b) Turn the ignition switch off.
(c) Turn the ignition switch to ON and wait for 90 seconds.
(d) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
NG
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) POWER SOURCE)
|
(a) Disconnect the I143 DCM (telematics transceiver) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I143-20 (E) - Body ground
|
Always
|
Below 1 Ω
|
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I143-1 (+B) - I143-20 (E)
|
Always
|
11 to 14 V
|
I143-19 (IG2) - I143-20 (E)
|
Ignition switch to ON
|
11 to 14 V
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
3.
|
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))
|
(a) Disconnect the I57 radio and display receiver assembly connector.
(b) Disconnect the I143 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I57-10 (USBV) - I143-15 (USBV)
|
Always
|
Below 1 Ω
|
I57-11 (USBG) - I143-31 (USBG)
|
Always
|
Below 1 Ω
|
I57-10 (USBV) or I143-15 (USBV) - Body ground
|
Always
|
10 kΩ or higher
|
I57-11 (USBG) or I143-31 (USBG) - Body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY
|
(a) Disconnect the I57 radio and display receiver assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I57-11 (USBG) - Body ground
|
Always
|
Below 1 Ω
|
|
|
*a
|
Component without harness connected
(Radio and Display Receiver Assembly)
|
|
|
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
I57-10 (USBV) - I57-11 (USBG)
|
Ignition switch to ACC
|
4.75 to 5.25 V
|
OK
|
|
|
5.
|
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - NAVIGATION ECU)
|
(a) Disconnect the t7 DCM (telematics transceiver) connector.
(b) Disconnect the t6 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
t7-2 (USB+) - t6-1 (USB+)
|
Always
|
Below 1 Ω
|
t7-1 (USB-) - t6-2 (USB-)
|
Always
|
Below 1 Ω
|
t7-3 (USBS) - t6-3 (USBS)
|
Always
|
Below 1 Ω
|
t7-2 (USB+) or t6-1 (USB+) - Body ground
|
Always
|
10 kΩ or higher
|
t7-1 (USB-) or t6-2 (USB-) - Body ground
|
Always
|
10 kΩ or higher
|
t7-3 (USBS) or t6-3 (USBS) - Body ground
|
Always
|
10 kΩ or higher
|
|
|
*a
|
Front view of wire harness connector
(to DCM (telematics transceiver))
|
*b
|
Front view of wire harness connector
(to Navigation ECU)
|
|
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
6.
|
CHECK DCM (TELEMATICS TRANSCEIVER)
|
(a) Replace the DCM (telematics transceiver) with a new one.
Click here
(b) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON and wait for 90 seconds.
(e) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
OK |
|
END (DCM (TELEMATICS TRANSCEIVER) IS DEFECTIVE)
|
NG
|
|
|
(a) Replace the navigation ECU with a new one.
Click here
(b) Clear the DTCs.
Body Electrical > Navigation System > Clear DTCs
(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON and wait for 90 seconds.
(e) Recheck for DTCs and check that no DTCs are output.
Body Electrical > Navigation System > Trouble Codes
OK:
No DTCs are output.
OK |
|
END (NAVIGATION ECU IS DEFECTIVE)
|
|