Toyota Camry owners & service manuals

Toyota Camry (XV70): Emergency Call Switch Circuit Short to Ground (B15C511,B15C513)

Toyota Camry Repair Manual XV70 (2018-2024) / Audio, Visual, Telematics / Cellular Communication / Safety Connect System / Emergency Call Switch Circuit Short to Ground (B15C511,B15C513)

DESCRIPTION

If the DCM (telematics transceiver) detects an error in the communication between the DCM (telematics transceiver) and the roof console box sub-assembly (manual (SOS) switch) as a result of the DCM (telematics transceiver) self check, this DTC will be stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C511

Emergency Call Switch Circuit Short to Ground

Manual (SOS) switch impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)

  • Roof console box sub-assembly (manual (SOS) switch)
  • Harness or connector
  • DCM (telematics transceiver)

B15C513

Emergency Call Switch Circuit Open

Manual (SOS) switch impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the engine switch is on (IG)

  • Roof console box sub-assembly (manual (SOS) switch)
  • Harness or connector
  • DCM (telematics transceiver)

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

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.

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)

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

Click here

*a

Component without harness connected

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

24 (SIG1) - 16 (GND3)

Manual (SOS) switch not operated

410 to 414 Ω

24 (SIG1) - 16 (GND3)

Manual (SOS) switch operated

81 to 83 Ω

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 K140 DCM (telematics transceiver) connector.

(b) Disconnect the V14 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

K140-21 (SIG1) - V14-24 (SIG1)

Always

Below 1 Ω

K140-3 (SIG-) - V14-16 (GND3)

Always

Below 1 Ω

K140-21 (SIG1) or V14-24 (SIG1) - Body ground

Always

10 kΩ or higher

K140-3 (SIG-) or V14-16 (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)

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

Click here

*a

Component without harness connected

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

17 (SIG1) - 12 (GND3)

Manual (SOS) switch not operated

410 to 414 Ω

17 (SIG1) - 12 (GND3)

Manual (SOS) switch operated

81 to 83 Ω

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 K140 DCM (telematics transceiver) connector.

(b) Disconnect the V18 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

K140-21 (SIG1) - V18-17 (SIG1)

Always

Below 1 Ω

K140-3 (SIG-) - V18-12 (GND3)

Always

Below 1 Ω

K140-21 (SIG1) or V18-17 (SIG1) - Body ground

Always

10 kΩ or higher

K140-3 (SIG-) or V18-12 (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

NOTICE:

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

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