DTC 3-1

CELLULAR COMMUNICATION: LEXUS LINK SYSTEM: 3-1: GPS Antenna Error

DTC 3-1 - GPS Antenna Error

DESCRIPTION

This DTC is output when one of the following occurs: 1) the mayday ECU assembly is malfunctioning; or 2) the GPS antenna assembly is malfunctioning.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT GPS ANTENNA ASSEMBLY




(a) Disconnect the antenna connector from the ECU.
(b) Measure the resistance of the antenna.
Standard resistance:






NG -- REPLACE GPS ANTENNA ASSEMBLY
OK -- Continue to next step.
2. REPLACE MAYDAY ECU ASSEMBLY
(a) Temporarily replace the mayday ECU Removal and mayday battery Removal with a new one.
(b) Check for the current DTC again.
OK:
System operates normally (red LED off).
NG:
Current DTC 3-1 exists
NOTE:
If replacement of the ECU is necessary, replace the mayday battery (backup battery) together with the ECU. After the replacement, register the ECU Programming and Relearning.

OK -- END
NG -- REPLACE GPS ANTENNA ASSEMBLY