Lexus ES manuals

Lexus ES: Voice Guidance does not Function

WIRING DIAGRAM

PROCEDURE

1.

CHECK VOICE GUIDANCE SETTING

(a) Check that the voice guidance settings are not off.

OK:

Voice guidance settings are not off.

NG

CHANGE VOICE GUIDANCE SETTINGS TO ON

OK

2.

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

(a) Disconnect the G1 radio receiver assembly connector.

(b) Disconnect the G14 navigation ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G1-22 (SI+) - G14-6 (VOI+)

Always

Below 1 Ω

G1-23 (SI-) - G14-7 (VOI-)

Always

Below 1 Ω

G1-22 (SI+) or G14-6 (VOI+) - Body ground

Always

10 kΩ or higher

G1-23 (SI-) or G14-7 (VOI-) - Body ground

Always

10 kΩ or higher

G14-8 (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

READ NEXT:

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