Toyota CH-R Service Manual: Manual Button Malfunction (B15C5)

Toyota CH-R Service Manual / Cellular Communication / Safety Connect System / Manual Button Malfunction (B15C5)

DESCRIPTION

This DTC is set when the DCM (Telematics Transceiver) detects an open or short circuit in the manual (SOS) switch.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C5

Manual Button Malfunction

Open or short circuit in manual (SOS) switch is detected.
  • Mayday switch assembly (manual (SOS) switch)
  • Map light assembly
  • Wire harness or connector
  • DCM (Telematics Transceiver)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Before performing this diagnostic procedure, make sure to perform Health Check and confirm that the DCM/VIN registration information is correct.

Click here

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

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

(d) Turn the Techstream on.

(e) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTC B1570, B1571 and B15C5 are output

A

DTC B15C5 is output

(DTC B1570 and B1571 are not output)

B
B

GO TO STEP 6

A

2.

INSPECT MAP LIGHT ASSEMBLY

(a) Disconnect the R4 map light assembly connector.

*a

Component without harness connected

(Map Light Assembly)

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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

8 (SIG1) - 1 (GND3)

Manual (SOS) switch not pressed

392 to 432 Ω

8 (SIG1) - 1 (GND3)

Manual (SOS) switch pressed

78 to 86 Ω
NG

GO TO STEP 5

OK

3.

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

(a) Disconnect the F134 DCM (Telematics Transceiver) connector.

(b) Disconnect the R4 map light assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F134-26 (SIG-) - R4-1 (GND3)

Always

Below 1 Ω

F134-26 (SIG-) or R4-1 (GND3) - Body ground

Always

10 kΩ or higher

F134-27 (SIG1) - R4-8 (SIG1)

Always

Below 1 Ω

F134-27 (SIG1) or R4-8 (SIG1) - 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).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

5.

INSPECT MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH) (RED INDICATOR)

(a) Remove the mayday switch assembly (manual (SOS) switch).

Click here

(b) Inspect the mayday switch assembly (manual (SOS) switch).

Click here

OK

REPLACE MAP LIGHT ASSEMBLY

NG

REPLACE MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH)

6.

READ VALUE USING TECHSTREAM (MANUAL (SOS) SWITCH OPERATION)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

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

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Telematics / Data List.

(f) Check that the manual (SOS) switch condition observed on the Techstream changes according to manual (SOS) switch operation.

Body Electrical > Telematics > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Emergency Switch

Manual (SOS) switch

OFF or ON

OFF: Manual (SOS) switch not pressed

ON: Manual (SOS) switch pressed*

-
Body Electrical > Telematics > Data List

Tester Display

Emergency Switch
  • *: Pressing the manual (SOS) switch will connect to the call center.

Result

Proceed to

Techstream display changes when turning the manual (SOS) switch ON/OFF

A

Techstream display does not change when turning the manual (SOS) switch ON/OFF

B
B

GO TO STEP 8

A

7.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

8.

INSPECT DCM (TELEMATICS TRANSCEIVER) (SIG1 VOLTAGE)

(a) Remove the DCM (Telematics Transceiver) but do not disconnect the connectors.

Click here

*a

Component with harness connected

(DCM (Telematics Transceiver))

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F134-27 (SIG1) - F134-26 (SIG-)

Ignition switch ON manual (SOS) switch not pressed

1.5 to 2.0 V
NG

GO TO STEP 10

OK

9.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

10.

INSPECT MAP LIGHT ASSEMBLY

(a) Disconnect the R4 map light assembly connector.

*a

Component without harness connected

(Map Light Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8 (SIG1) - 1 (GND3)

Manual (SOS) switch not pressed

392 to 432 Ω

8 (SIG1) - 1 (GND3)

Manual (SOS) switch pressed

78 to 86 Ω
NG

GO TO STEP 13

OK

11.

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

(a) Disconnect the F134 DCM (Telematics Transceiver) connector.

(b) Disconnect the R4 map light assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F134-27 (SIG1) -R4-8 (SIG1)

Always

Below 1 Ω

F134-27 (SIG1) or R4-8 (SIG1) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

  • The ignition switch must be off.
  • Do not swap the DCM (Telematics Transceiver) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

13.

INSPECT MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH) (RED INDICATOR)

(a) Remove the mayday switch assembly (manual (SOS) switch).

Click here

(b) Inspect the mayday switch assembly (manual (SOS) switch).

Click here

OK

REPLACE MAP LIGHT ASSEMBLY

NG

REPLACE MAYDAY SWITCH ASSEMBLY (MANUAL (SOS) SWITCH)

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