RM38T0EC _56 Audio / Visual / Telematics _115231 TELEMATICS _0512170 TELEMATICS SYSTEM(for TOYOTA Connect) C

TELEMATICS  TELEMATICS SYSTEM(for TOYOTA Connect)  B157011  Indicator (Red) Circuit Short to Ground  B157013  Indicator (Red) Circuit Open  


DESCRIPTION

This DTC is stored when the telematics transceiver detects an open or short in the emergency call switch indicator (red) circuit of the emergency call switch.

The manual (SOS) switch indicator (red) illuminates for 5 seconds and turns off when the ignition switch is turned to ON.

If a malfunction in the telematics system is detected, the emergency call switch indicator (red) will blink. However, the emergency call switch indicator (red) may not illuminate when this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B157011 Indicator (Red) Circuit Short to Ground Emergency call switch indicator (red) impedance (Ω) is lower than the malfunction threshold for 10 seconds or more when the ignition switch is ON
·

Telematics transceiver

·

Map light assembly (emergency call switch)

·

Harness or connector


B157013 Indicator (Red) Circuit Open Emergency call switch indicator (red) impedance (Ω) is higher than the malfunction threshold for 10 seconds or more when the ignition switch is ON
·

Telematics transceiver

·

Map light assembly (emergency call switch)

·

Harness or connector



WIRING DIAGRAM

E484662E03
1.896,1.021 2.354,1.219 0.458,0.198 10 false RED 3.406,0.656 3.625,0.854 0.219,0.198 10 false 10 3.406,1.073 3.719,1.313 0.313,0.24 10 false 19 3,0.656 3.615,0.854 0.615,0.198 10 false IND1 2.938,1.073 3.552,1.271 0.615,0.198 10 false GND3 1.25,1.729 1.708,1.927 0.458,0.198 10 false T6 1.24,1.906 3.552,2.365 2.313,0.458 10 false Map Light Assembly (Emergency Call Switch) 4.979,0.667 5.292,0.865 0.313,0.198 10 false 4 4.969,1.073 5.281,1.271 0.313,0.198 10 false 3 5.167,0.781 5.781,0.979 0.615,0.198 10 false IND1 5.167,1.073 5.781,1.271 0.615,0.198 10 false SIG- 5.094,1.708 5.552,1.906 0.458,0.198 10 false I200 5.083,1.896 6.646,2.104 1.563,0.208 10 false Telematics Transceiver

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 Telematics System.

Click hereAudio / Visual / Telematics>TELEMATICS>TELEMATICS SYSTEM (for TOYOTA Connect)>PRECAUTION

·

When replacing the telematics transceiver, make sure to replace it with a new one.

·

Before replacing the telematics transceiver, refer to Service Bulletin.



HINT:

If DTC B157011 or B157013 is stored, the emergency call switch indicator (red) 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
50002 459

c.

Check for DTCs and check that no DTCs are output.

Body Electrical > Telematics > Trouble Codes
50001 459
OK:

No DTCs are output.



Result:
Proceed to
OK
NG



OK

USE SIMULATION METHOD TO CHECK

Click hereGeneral>INTRODUCTION>HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS>HOW TO PROCEED WITH TROUBLESHOOTING


NG

2.CHECK MAP LIGHT ASSEMBLY (EMERGENCY CALL SWITCH) (INPUT VOLTAGE)
2.CHECK MAP LIGHT ASSEMBLY (EMERGENCY CALL SWITCH) (INPUT VOLTAGE)
a.
B234642C80
1.51,0.063 1.948,0.323 0.438,0.26 1.24,1.281 1.313,1.802 true 1.104,1.115 0.823,1.677 true 0.115,0.094 0.417,0.417 0.302,0.323 10 false *a 1.156,1.802 1.698,2.031 0.542,0.229 10 false GND3 0.625,1.688 1.031,1.854 0.406,0.167 10 false IND1 1.615,0.094 1.969,0.281 0.354,0.188 10 false T6
*a Component with harness connected
(Map Light Assembly [Emergency Call Switch])


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

Standard Voltage:
Tester Connection Condition Specified Condition
T6-10 (IND1) - T6-19 (GND3) 2 seconds after ignition switch turned to ON
→ Ignition switch off 		8.5 to 10 V
→ Below 1 V



Result:
Proceed to
OK
NG



OK

3.INSPECT MAP LIGHT ASSEMBLY (EMERGENCY CALL SWITCH) (RED INDICATOR)

NG

4.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY [EMERGENCY CALL SWITCH])
3.INSPECT MAP LIGHT ASSEMBLY (EMERGENCY CALL SWITCH) (RED INDICATOR)
a.
B641818C01
0.406,1.771 0.823,1.094 true 1.188,1.76 1.021,1.333 true 0.073,0.094 0.354,0.333 0.281,0.24 10 false *a 1.052,1.792 1.573,2.01 0.521,0.219 10 false GND3 0.24,1.76 0.677,1.969 0.438,0.208 10 false IND1
*a Component without harness connected
(Map Light Assembly [Emergency Call Switch])


Remove the map light assembly (emergency call switch).

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


b.

Connect 2 dry-cell batteries (1.5 V each) in series.


c.

Connect a positive (+) lead from the batteries to terminal 10 (IND1) and a negative (-) lead to terminal 19 (GND3) of the map light assembly (emergency call switch) connector.


d.

Check if the manual (SOS) switch indicator (red) illuminates.

OK:

Emergency call switch indicator (red) illuminates.



Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY [EMERGENCY CALL SWITCH])

NG

REPLACE MAP LIGHT ASSEMBLY

Click hereVehicle Interior>LIGHTING (INT)>PERSONAL LIGHT>REMOVAL


4.CHECK HARNESS AND CONNECTOR (TELEMATICS TRANSCEIVER - MAP LIGHT ASSEMBLY [EMERGENCY CALL SWITCH])
a.

Disconnect the I200 telematics transceiver connector.


b.

Disconnect the T6 map light assembly (emergency call 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) - T6-10 (IND1) Always Below 1 Ω
I200-4 (IND1) or T6-10 (IND1) - Body ground Always 10 kΩ or higher
I200-3 (SIG-) - T6-19 (GND3) Always Below 1 Ω
I200-3 (SIG-) or T6-19 (GND3) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

5.REPLACE TELEMATICS TRANSCEIVER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR