Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001PY55
Model Year Start: 2021 Model: Avalon HV Prod Date Range: [08/2020 -           ]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B157011,B157013; Indicator (Red) Circuit Short to Ground; 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]

DTC

B157011

Indicator (Red) Circuit Short to Ground

DTC

B157013

Indicator (Red) Circuit Open

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 indicator illuminates for 2 seconds and goes off when the ignition switch is turned to ON. If a malfunction in the safety connect system is detected, the manual (SOS) switch red indicator will illuminate.

However, the manual (SOS) switch red indicator may not illuminate when this DTC is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B157011

Indicator (Red) Circuit Short to Ground

Manual (SOS) switch red indicator impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the ignition switch is ON
  • DCM (telematics transceiver)
  • Roof console box sub-assembly (manual (SOS) switch)
  • Harness or connector

B157013

Indicator (Red) Circuit Open

Manual (SOS) switch red indicator impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the ignition switch is ON
  • DCM (telematics transceiver)
  • Roof console box sub-assembly (manual (SOS) switch)
  • Harness or connector

WIRING DIAGRAM

w/ Sliding Roof
w/o Sliding Roof

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 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: PRECAUTION 2022 MY Avalon Avalon HV [08/2021 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: PRECAUTION

HINT:

If DTC B157011 or B157013 is stored, the manual (SOS) switch red indicator may not illuminate when another DTC is stored.

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

(b) Connect the GTS to the DLC3.

(c) Turn the ignition switch to ON and wait for 10 seconds or more.

(d) Turn the GTS 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.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

w/ Sliding Roof

A

w/o Sliding Roof

B
B

GO TO STEP 5

A

3.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) (RED INDICATOR)

(a) Remove the roof console box sub-assembly (manual (SOS) switch).

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Roof Console Box Sub-assembly (Manual (SOS) Switch))

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

(c) Connect a positive (+) lead from the batteries to terminal 10 (IND1) and a negative (-) lead to terminal 16 (GND3) of the roof console box sub-assembly (manual (SOS) switch) connector.

(d) Check if the manual (SOS) switch red indicator illuminates.

OK:

Manual (SOS) switch red indicator illuminates.

NG

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH)

OK

4.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH))

(a) Disconnect the G124 DCM (telematics transceiver) connector.

(b) Disconnect the O10 roof console box sub-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

G124-4 (IND1) - O10-10 (IND1)

Always

Below 1 Ω

G124-4 (IND1) or O10-10 (IND1) - Body ground

Always

10 kΩ or higher

G124-3 (SIG-) - O10-16 (GND3)

Always

Below 1 Ω

G124-3 (SIG-) or O10-16 (GND3) - Body ground

Always

10 kΩ or higher
OK

GO TO STEP 7

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH) (RED INDICATOR)

(a) Remove the roof console box sub-assembly (manual (SOS) switch).

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Roof Console Box Sub-assembly (Manual (SOS) Switch))

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

(c) Connect a positive (+) lead from the batteries to terminal 7 (IND1) and a negative (-) lead to terminal 12 (GND3) of the roof console box sub-assembly (manual (SOS) switch) connector.

(d) Check if the manual (SOS) switch red indicator illuminates.

OK:

Manual (SOS) switch red indicator illuminates.

NG

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH)

OK

6.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH))

(a) Disconnect the G124 DCM (telematics transceiver) connector.

(b) Disconnect the O9 roof console box sub-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

G124-4 (IND1) - O9-7 (IND1)

Always

Below 1 Ω

G124-4 (IND1) or O9-7 (IND1) - Body ground

Always

10 kΩ or higher

G124-3 (SIG-) - O9-12 (GND3)

Always

Below 1 Ω

G124-3 (SIG-) or O9-12 (GND3) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

REPLACE DCM (TELEMATICS TRANSCEIVER)

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

Click here 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

NOTICE:

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

PERFORM DCM ACTIVATION