Operation CHARM: Car repair manuals for everyone.
Home >> Toyota >> 2013 >> Corolla L4-1.8L (2ZR-FE) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Navigation System >> Testing and Inspection >> Component Tests and General Diagnostics >> Mute Signal Circuit Between Radio Receiver and Extension Module
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Mute Signal Circuit Between Radio Receiver and Extension Module





NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Mute Signal Circuit between Radio Receiver and Extension Module; 2013 MY Corolla [07/2012 -]
- Mute Signal Circuit between Radio Receiver and Extension Module

DESCRIPTION

This circuit sends a signal to the extension module to mute noise. Due to this, the noise produced by changing the sound source ceases.

If there is an open in the circuit, noise can be heard from the speakers when changing the sound source.

If there is a short in the circuit, even though the extension module is functioning, no sound, or only an extremely faint sound, can be heard.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
After replacing the radio and display receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, XM radio ID registration is necessary (w/ SDARS System).

PROCEDURE

1. INSPECT EXTENSION MODULE

(a) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

OK -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - EXTENSION MODULE)

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

(b) Disconnect the extension module connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (OUTPUT SIGNAL)

(a) Reconnect the radio and display receiver assembly connector.

(b) Measure the voltage according to the value(s) in the table below.





Standard Voltage:





Text in Illustration





NG -- REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Removal

OK -- REPLACE EXTENSION MODULE Removal
pro multis · About Operation CHARM