Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: 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 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)
  • 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 ignition switch is ON

  • 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

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 to ON and wait for 10 seconds or more.

(b) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(c) 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) (RED 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 the batteries to terminal 6 (IND1) and a negative (-) lead to terminal 8 (GND3) of the map light assembly (manual [SOS] switch) connector.

(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

3.

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

(a) Disconnect the I200 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

I200-4 (IND1) - T6-6 (IND1)

Always

Below 1 Ω

I200-4 (IND1) or T6-6 (IND1) - Body ground

Always

10 kΩ or higher

I200-3 (SIG-) - T6-8 (GND3)

Always

Below 1 Ω

I200-3 (SIG-) or T6-8 (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 ignition switch must be off.
  • Do not exchange the DCM (telematics transceiver) with one from another vehicle.
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