Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Indicator (Green) Circuit Short to Ground (B157111,B157113)

Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual / Audio & Visual & Telematics / Cellular Communication / Safety Connect System / Indicator (Green) Circuit Short to Ground (B157111,B157113)

DESCRIPTION

This DTC is set when the DCM (telematics transceiver) detects an open or short in the manual (SOS) switch green indicator circuit of the manual (SOS) switch. The manual (SOS) switch green indicator illuminates after the engine switch is turned on (IG).

If the safety connect system is not active, the manual (SOS) switch green indicator will turn off.

If the safety connect system is active, the manual (SOS) switch green indicator will blink while communicating with the call center.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B157111

Indicator (Green) Circuit Short to Ground

Manual (SOS) switch green indicator impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light assembly (manual (SOS) switch)
  • Harness or connector

B157113

Indicator (Green) Circuit Open

Manual (SOS) switch green indicator impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light assembly (manual (SOS) switch)
  • Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Safety Connect System.

Click here

PROCEDURE

1.

CHECK DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and wait for 10 seconds or more.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Check for DTCs and check that no DTCs are output.

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH) (GREEN INDICATOR)

(a) Remove the map light assembly (manual (SOS) switch).

Click here

*a

Component without harness connected

(Map Light Assembly (Manual (SOS) Switch))

(b) Connect 2 dry-cell batteries (1.5 V each) in series.

(c) Connect a positive (+) lead from batteries to terminal 7 (IND2) and a negative (-) lead to terminal 9 (GND3) of the map light assembly (manual (SOS) switch) connector.

(d) Check if the manual (SOS) switch green indicator comes on.

OK:

Manual (SOS) switch green indicator illuminates.

NG

REPLACE ROOF CONSOLE BOX ASSEMBLY (MANUAL [SOS] SWITCH)

OK

3.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH))

(a) Disconnect the J157 DCM (telematics transceiver) connector.

(b) Disconnect the U12 map light assembly (manual (SOS) switch) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J157-22 (IND2) - U12-7 (IND2)

Always

Below 1 Ω

J157-22 (IND2) or U12-7 (IND2) - Body ground

Always

10 kΩ or higher

J157-3 (SIG-) - U12-9 (GND3)

Always

Below 1 Ω

J157-3 (SIG-) or U12-9 (GND3) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (telematics transceiver) with a new one.

Click here

NOTICE:

  • The engine switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

    Indicator (Red) Circuit Short to Ground (B157011,B157013)
    DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects an open or short in the manual (SOS) switch red indicator circuit of the manual (SOS) switch. The manual (SOS) switch red i ...

    Microphone Circuit Open (B157213)
    DESCRIPTION This DTC is stored when the DCM (telematics transceiver) detects a malfunction in the telephone microphone assembly circuit. DTC No. Detection Item DTC Detection Condition Trouble ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Automatic Transaxle Unit: Disassembly
    DISASSEMBLY PROCEDURE 1. REMOVE BREATHER PLUG HOSE (a) Using a screwdriver with its tip wrapped with protective tape, remove the breather plug hose from the breather plug. NOTICE: Be careful not to damage the breather plug. (b) Using a screwdriver with its tip wrapped with protecti ...

    Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual > Meter / Gauge System: Open in Turn Signal Circuit (B1507)
    DESCRIPTION These DTCs are stored when the combination meter assembly detects an open in a turn signal light circuit, or a short in a turn signal light circuit or the hazard warning light circuit. HINT: If there is an open in a front turn signal light circuit or rear turn signal light circuit, th ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    Chevrolet Trax (2013-2022) Owner's Manual

    © 2023 Copyright www.lexusrx.net
    0.0169