Toyota CH-R Service Manual: DCM Data Signal Circuit between Navigation ECU and DCM

Toyota CH-R Service Manual / Cellular Communication / Toyota Entune System / DCM Data Signal Circuit between Navigation ECU and DCM

DESCRIPTION

This circuit is used to send and receive signals between the DCM (Telematics Transceiver) and radio and display receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.

CHECK VEHICLE TYPE

(a) Check vehicle type.

Result

Proceed to

w/ Navigation System

A

w/o Navigation System

B
B

GO TO STEP 5

A

2.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - NO. 1 NAVIGATION WIRE)

(a) Disconnect the F140 No. 1 Navigation Wire connector.

(b) Disconnect the F133 DCM (Telematics Transceiver) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F133-2 (USB+) - F140-1

Always

Below 1 Ω

F133-1 (USB-) -F140-2

Always

Below 1 Ω

F133-6 (USBS) - F140-3

Always

Below 1 Ω

F133-2 (USB+) or F140-1 - Body ground

Always

10 kΩ or higher

F133-1 (USB-) or F140-2 - Body ground

Always

10 kΩ or higher

F133-6 (USBS) or F140-3 - Body ground

Always

10 kΩ or higher
NG

REPLACE NO. 1 NAVIGATION WIRE

OK

3.

INSPECT NAVIGATION WIRE

(a) Disconnect the G no. 1 navigation wire connector.

(b) Disconnect the H navigation ECU connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G-1 -H-1 (USB+)

Always

Below 1 Ω

G-2 - H-2 (USB-)

Always

Below 1 Ω

G-3 - H-3 (USBS)

Always

Below 1 Ω

G-1 or H-1 (USB+) - Body ground

Always

10 kΩ or higher

G-2 or H-2 (USB-) - Body ground

Always

10 kΩ or higher

G-3 or H-3 (USBS) - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(No. 1 Navigation Wire)

*a

Component without harness connected

(No. 1 Navigation Wire)
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the F133 DCM (Telematics Transceiver) connector.

(b) Disconnect the F130 radio and display receiver assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F133-5 (USBV) - F130-10 (USBV)

Always

Below 1 Ω

F133-3 (USBG) - F130-11 (USBG)

Always

Below 1 Ω

F133-9 (VOR+) - F130-15 (VOT+)

Always

Below 1 Ω

F133-8 (VOR-) - F130-16 (VOT-)

Always

Below 1 Ω

F133-4 (VOT+) - F130-13 (VOR+)

Always

Below 1 Ω

F133-7 (VOT-) - F130-14 (VOR-)

Always

Below 1 Ω

F133-5 (USBV) or F130-10 (USBV) - Body ground

Always

10 kΩ or higher

F133-3 (USBG) or F130-11 (USBG) - Body ground

Always

10 kΩ or higher

F133-9 (VOR+) or F130-15 (VOT+) - Body ground

Always

10 kΩ or higher

F133-8 (VOR-) or F130-16 (VOT-) - Body ground

Always

10 kΩ or higher

F133-4 (VOT+) or F130-13 (VOR+) - Body ground

Always

10 kΩ or higher

F133-7 (VOT-) or F130-14 (VOR-) - Body ground

Always

10 kΩ or higher

F130-12 (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

5.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Disconnect the F133 DCM (Telematics Transceiver) connector.

*a

Front view of wire harness connector

(to DCM (Telematics Transceiver))

(b) Disconnect the F130 and F136 radio and display receiver assembly connector.

*a

Front view of wire harness connector

(to Radio Receiver Assembly)

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F133-1 (USB-) - F136-2 (USB-)

Always

Below 1 Ω

F133-2 (USB+) - F136-1 (USB+)

Always

Below 1 Ω

F133-6 (USBS) - F136-3 (USBS)

Always

Below 1 Ω

F133-3 (USBG) - F130-11 (USBG)

Always

Below 1 Ω

F133-4 (VOT+) - F130-13 (VOR+)

Always

Below 1 Ω

F133-5 (USBV) - F130-10 (USBV)

Always

Below 1 Ω

F133-7 (VOT-) - F130-14 (VOR-)

Always

Below 1 Ω

F133-8 (VOR-) - F130-16 (VOT-)

Always

Below 1 Ω

F133-9 (VOR+) - F130-15 (VOT+)

Always

Below 1 Ω

F133-1 (USB-) or F136-2 (USB-) - Body ground

Always

10 kΩ or higher

F133-2 (USB+) or F136-1 (USB+) - Body ground

Always

10 kΩ or higher

F133-6 (USBS) or F136-3 (USBS) - Body ground

Always

10 kΩ or higher

F133-3 (USBG) or F130-11 (USBG) - Body ground

Always

10 kΩ or higher

F133-4 (VOT+) or F130-13 (VOR+) - Body ground

Always

10 kΩ or higher

F133-5 (USBV) or F130-10 (USBV) - Body ground

Always

10 kΩ or higher

F133-7 (VOT-) or F130-14 (VOR-) - Body ground

Always

10 kΩ or higher

F133-8 (VOR-) or F130-16 (VOT-) - Body ground

Always

10 kΩ or higher

F133-9 (VOR+) or F130-15 (VOT+) - 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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