Toyota Corolla Cross Owners & Service Manuals

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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