Toyota 4Runner manuals

Toyota 4Runner: Manual Button Malfunction (B15C5)

DESCRIPTION

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

DTC Code

DTC Detection Condition

Trouble Area

B15C5

An open or short circuit in the manual (SOS) switch is detected.

  • DCM (Telematics Transceiver)
  • Map light assembly
  • Harness or connector

WIRING DIAGRAM


PROCEDURE

1.

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 to ON and wait for 10 seconds.

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

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

Telematics

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

-

Result

Result

Proceed to

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

A

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

B


B

GO TO STEP 3

A

2.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver) (See page ).


NOTICE:

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

NEXT

PERFORM DCM ACTIVATION

3.

CHECK DCM (TELEMATICS TRANSCEIVER) (SIG1 VOLTAGE)

(a) Remove the DCM (Telematics Transceiver) with the connector connected (See page ).



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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F39-27 (SIG1) - F39-26 (SIG-)

Ignition switch ON, manual (SOS) switch not pressed

1.5 to 2.0 V

Text in Illustration

*a

Component with harness connected

(DCM [Telematics Transceiver])


NG

GO TO STEP 5

OK

4.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver) (See page ).


NOTICE:

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

NEXT

PERFORM DCM ACTIVATION

5.

INSPECT MAP LIGHT ASSEMBLY (MANUAL [SOS] SWITCH)

(a) Remove the map light assembly (See page ).



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

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

20 (SIG2) - 16 (GND)

Manual (SOS) switch not pressed

410 to 414 Ω

20 (SIG2) - 16 (GND)

Manual (SOS) switch pressed

81 to 83 Ω

Text in Illustration

*a

Component without harness connected

(Map Light Assembly)


NG

REPLACE MAP LIGHT ASSEMBLY

OK

6.

CHECK HARNESS AND CONNECTOR (DCM - MAP LIGHT ASSEMBLY)

(a) Disconnect the F39 DCM (Telematics Transceiver) connector.


(b) Disconnect the U2 map light assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F39-27 (SIG1) - U2-20 (SIG2)

Always

Below 1 Ω

F39-26 (SIG-) - U2-16 (GND)

Always

Below 1 Ω

F39-27 (SIG1) - Body ground

Always

10 kΩ or higher

F39-26 (SIG-) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

Front view of wire harness connector

(to DCM [Telematics Transceiver])

*b

Front view of wire harness connector

(to Map Light Assembly)


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver) (See page ).


NOTICE:

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

NEXT

PERFORM DCM ACTIVATION

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