DTC B15C5: Manual Button Malfunction: Procedure

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG) and wait for 10 seconds.
4. Turn the Techstream on.
5. Perform "Health Check" and check for current DTCs. Refer to HEALTH CHECK .

   Result

   Result	Proceed to
   DTC B1570, B1571 and B15C5 are output	A
   DTC B15C5 is output (DTC B1570 and B1571 are not output)	B

B → See step   5 

A: Go to next step 

1. Disconnect the S12 roof console box assembly connector.
   Fig 1: Inspecting S12 Roof Console Box Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   S12-20 (SIG1) - S12-16 (GND3)	Manual (SOS) switch not pressed	410 to 414 Ω
   S12-20 (SIG1) - S12-16 (GND3)	Manual (SOS) switch pressed	81 to 83 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Roof Console Box Assembly)

NG → See step   12 

OK: Go to next step 

1. Disconnect the I135 DCM (Telematics Transceiver) connector.
2. Disconnect the S12 roof console box assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I135-26 (SIG-) - S12-16 (GND3)	Always	Below 1 Ω
   I135-26 (SIG-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL .
   NOTE:

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

NEXT → See step   13 

1. Turn the engine switch off.
2. Connect the Techstream to the DLC3.
3. Turn the engine switch on (IG) and wait for 10 seconds.
4. Turn the Techstream on.
5. Enter the following menus: Body Electrical / Telematics / Data List.
6. Check that the manual (SOS) switch condition observed on the Techstream changes according to manual (SOS) switch operation.
   TELEMATICS (DCM (TELEMATICS TRANSCEIVER))
   
   

   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*	-

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

   Result

   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 → See step   7 

A: Go to next step 

1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL .
   NOTE:

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

NEXT → See step   13 

1. Remove the DCM (Telematics Transceiver) but do not disconnect the connectors. Refer to REMOVAL .
   Fig 2: Inspecting I135 DCM (Telematics Transceiver) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I135-27 (SIG1) - I135-26 (SIG-)	Engine switch on (IG), manual (SOS) switch not pressed	1.5 to 2.0 V

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (DCM (Telematics Transceiver))

NG → See step   9 

OK: Go to next step 

1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL .
   NOTE:

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

NEXT → See step   13 

1. Disconnect the S12 roof console box assembly connector.
   Fig 3: Inspecting S12 Roof Console Box Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   S12-20 (SIG1) - S12-16 (GND3)	Manual (SOS) switch not pressed	410 to 414 Ω
   S12-20 (SIG1) - S12-16 (GND3)	Manual (SOS) switch pressed	81 to 83 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Roof Console Box Assembly)

NG → See step   12 

OK: Go to next step 

1. Disconnect the I135 DCM (Telematics Transceiver) connector.
2. Disconnect the S12 roof console box assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I135-27 (SIG1) - S12-20 (SIG1)	Always	Below 1 Ω
   I135-27 (SIG1) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the DCM (Telematics Transceiver). Refer to REMOVAL .
   NOTE:

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

NEXT → See step   13