B1572

CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B1572: Telephone Microphone Error
B1572 - Telephone Microphone Error

DESCRIPTION

This DTC is stored when the DCM (telematics transceiver) detects a malfunction in the telephone microphone assembly circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG) and wait for 10 seconds.

(d) Perform "Health Check" and check for current DTCs Health Check.

Result





B -- CHECK FOR INTERMITTENT PROBLEMS How To Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK MAP LIGHT ASSEMBLY (TELEPHONE MICROPHONE POWER SOURCE)

(a) Remove the map light assembly with the connector connected Removal.





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

Standard Voltage:





Text in Illustration





NG -- CHECK DCM (TELEMATICS TRANSCEIVER) (TELEPHONE MICROPHONE POWER SOURCE)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (DCM - MAP LIGHT ASSEMBLY)

(a) Disconnect the L127 DCM (telematics transceiver) connector.





(b) Disconnect the X4 map light assembly connector.

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

Standard Resistance:





Text in Illustration





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

4. REPLACE TELEPHONE MICROPHONE ASSEMBLY

(a) Replace the telephone microphone assembly with a normally functioning one and check that the same problem does not occur again Removal.

OK:

The system returns to normal.

NG -- REPLACE MAP LIGHT ASSEMBLY Removal

OK -- END

5. CHECK DCM (TELEMATICS TRANSCEIVER) (TELEPHONE MICROPHONE POWER SOURCE)

(a) Remove the DCM (telematics transceiver) with the connector connected Removal.





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

Standard Voltage:





Text in Illustration





NG -- REPLACE DCM (TELEMATICS TRANSCEIVER)

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR

6. REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) Removal.

NOTICE:
* The power switch must be off.
* Do not replace the DCM (telematics transceiver) with one from another vehicle.

NEXT -- PERFORM DCM ACTIVATION DCM Activation