Nissan Murano: Dtc/circuit Diagnosis / U1a0e Sos Switch on Stuck

Nissan Murano (Z52) 2015-2024 Service Manual / Driver Information & Multimedia / Audio, Visual & Navigation System :: Telematics System / Dtc/circuit Diagnosis / U1a0e Sos Switch on Stuck

DTC Description

DTC DETECTION LOGIC

DTC No.

CONSULT screen terms

(Trouble diagnosis content)
DTC detection condition
U1A0E

SOS SWITCH ON STUCK

(SOS switch ON stuck)
Diagnosis condition When ignition switch is ON.
Signal (terminal) SOS switch signal
Threshold Continue being turned ON
Diagnosis delay time 10 seconds or more

POSSIBLE CAUSE

  • Harness or connectors

  • Telematics switch

  • TCU

FAIL-SAFE

  • Telematics system does not function (Only SOS call does not operate)

  • Telematics switch LED indicator is turned OFF

DTC Confirmation Procedure

PERFORM DTC CONFIRMATION PROCEDURE

CONSULT

  1. Ignition switch ON.

  2. Select “Self Diagnostic Result” mode of “TELEMATICS”.

  3. Check DTC.

Is DTC U1A0E detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO>>

Confirmation after repair: Inspection End.

Diagnosis Procedure

CHECK ECALL SW FOR SHORT CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect TCU connector and telematics switch connector.

  3. Check the continuity between TCU connector and ground.

    TCU Ground Continuity
    Connector Terminal
    M126 37 No

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness or connectors.

CHECK TELEMATICS SWITCH

Check continuity between telematics switch terminals.

Telematics switch connector R21 Condition Continuity
Terminal Terminal
3 7 Switch pressed Yes
Switch released No

Is the inspection result normal?

YES>>

Replace TCU. Refer to Removal and Installation.

NO>>

Replace telematics switch. Refer to Removal and Installation.

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