Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000026PMQ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): B157011,B157013; Indicator (Red) Circuit Short to Ground; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

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 engine switch is turned on (IG). 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 engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light 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 engine switch is on (IG)
  • DCM (telematics transceiver)
  • Map light assembly (manual (SOS) switch)
  • Harness or connector

WIRING DIAGRAM

for TMC Made
for TMMMS Made

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 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 -        ]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM (for Gasoline Model): 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 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.

CHECK MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for TMC Made

A

for TMMMS Made

B
B

GO TO STEP 6

A

3.

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

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

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

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

(c) Connect a positive (+) lead from the batteries to terminal 6 (IND1) and a negative (-) lead to terminal 8 (GND3) of the map light assembly (manual (SOS) switch) connector.

*a

Component without harness connected

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

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

OK:

Manual (SOS) switch red indicator illuminates.

NG

REPLACE MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)

OK

4.

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

(a) Disconnect the I143 DCM (telematics transceiver) connector.

(b) Disconnect the T6 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

I143-4 (IND1) - T6-6 (IND1)

Always

Below 1 Ω

I143-4 (IND1) or T6-6 (IND1) - Body ground

Always

10 kΩ or higher

I143-3 (SIG-) - T6-8 (GND3)

Always

Below 1 Ω

I143-3 (SIG-) or T6-8 (GND3) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

REPLACE DCM (TELEMATICS TRANSCEIVER)

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

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

NOTICE:

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

PERFORM DCM ACTIVATION

6.

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

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

Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

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

(c) Connect a positive (+) lead from the batteries to terminal 8 (IND1) and a negative (-) lead to terminal 12 (GND3) of the map light assembly (manual (SOS) switch) connector.

*a

Component without harness connected

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

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

OK:

Manual (SOS) switch red indicator illuminates.

NG

REPLACE MAP LIGHT ASSEMBLY (MANUAL (SOS) SWITCH)

OK

7.

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

(a) Disconnect the I143 DCM (telematics transceiver) connector.

(b) Disconnect the T6 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

I143-4 (IND1) - T6-8 (IND1)

Always

Below 1 Ω

I143-4 (IND1) or T6-8 (IND1) - Body ground

Always

10 kΩ or higher

I143-3 (SIG-) - T6-12 (GND3)

Always

Below 1 Ω

I143-3 (SIG-) or T6-12 (GND3) - Body ground

Always

10 kΩ or higher
OK

GO TO STEP 5

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR