Toyota CH-R Service Manual: Voice Guidance does not Function

WIRING DIAGRAM

PROCEDURE

1.

CHECK VOICE GUIDANCE SETTING

(a) Check that the voice guidance setting is not off.

OK:

Voice guidance setting is not off.

NG

CHANGE VOICE GUIDANCE SETTING TO ON

OK

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - NAVIGATION ECU)

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

(b) Disconnect the F135 navigation ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F130-22 (SI+) - F135-6 (VOI+)

Always

Below 1 Ω

F130-23 (SI-) - F135-7 (VOI-)

Always

Below 1 Ω

F130-22 (SI+) or F135-6 (VOI+) - Body ground

Always

10 kΩ or higher

F130-23 (SI-) or F135-7 (VOI-) - Body ground

Always

10 kΩ or higher

F135-8 (SLD1) - 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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