Toyota Avalon Service & Repair Manual: Manual (SOS) Switch Red Indicator Malfunction (B1570)

DESCRIPTION

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

The manual (SOS) switch red indicator illuminates for 2 seconds and goes off when the engine switch is turned on (IG). If a malfunction in the safety connect system is detected, the manual (SOS) switch red indicator will illuminate.

However, the manual (SOS) switch red indicator may not illuminate when this DTC is set.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1570

Manual (SOS) Switch Red Indicator Malfunction

Current for manual (SOS) switch red indicator reaches malfunction criteria for 10 seconds when engine switch is on (IG).

  • Roof console box sub-assembly
  • Wire harness or connector
  • DCM (Telematics Transceiver)

WIRING DIAGRAM

w/o Sliding Roof w/ Sliding Roof

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

  • The manual (SOS) switch red indicator may not operate to indicate another DTC has been set, therefore voice guidance is provided.

PROCEDURE

1.

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 10

A

2.

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.

(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 B1570 is output (DTC B1571 and B15C5 are not output)

B

B

GO TO STEP 6

A

3.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (RED INDICATOR)

(a) Disconnect the O10 roof console box sub-assembly connector.

*a

Component without harness connected

(Roof Console Box Sub-assembly)

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

(c) Connect the positive (+) lead to terminal 10 (IND1) and the negative (-) lead to terminal 16 (GND3) of the roof console box sub-assembly connector.

(d) Check if the illumination for the manual (SOS) switch red indicator comes on.

OK:

Red indicator comes on.

NG

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY

OK

4.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX SUB-ASSEMBLY)

(a) Disconnect the G9 DCM (Telematics Transceiver) connector.

(b) Disconnect the O10 roof console box sub-assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-26 (SIG-) - O10-16 (GND3)

Always

Below 1 Ω

G9-26 (SIG-) or O10-16 (GND3) - Body ground

Always

10 kΩ or higher

G9-11 (IND1) - O10-10 (IND1)

Always

Below 1 Ω

G9-11 (IND1) or O10-10 (IND1) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

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

PERFORM DCM ACTIVATION

6.

CHECK ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH RED INDICATOR CONDITION)

(a) Confirm the red indicator status after the engine switch is turned on (IG).

Click here

Result

Proceed to

Red indicator remains off

A

Red indicator remains on

B

B

GO TO STEP 19

A

7.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (RED INDICATOR INPUT VOLTAGE)

(a) Remove the roof console box sub-assembly but do not disconnect the connectors.

Click here

*a

Component with harness connected

(Roof Console Box Sub-assembly)

(b) Connect the positive lead of a voltmeter to terminal O10-10 (IND1), and the negative lead to terminal O10-16 (GND3).

(c) Measure the voltage.

Standard:

1.0 to 8.5 V for 2 seconds after the engine switch is turned on (IG).

0 V when the engine switch is off.

OK

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY

NG

8.

INSPECT DCM (TELEMATICS TRANSCEIVER) (RED INDICATOR OUTPUT VOLTAGE)

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

Click here

*a

Component with harness connected

(DCM (Telematics Transceiver))

(b) Connect the positive lead of a voltmeter to terminal G9-11 (IND1), and the negative lead to body ground.

(c) Measure the voltage.

Standard:

1.0 to 8.5 V for 2 seconds after the engine switch is turned on (IG).

0 V when the engine switch is off.

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

NG

9.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-11 (IND1) - Body ground

Always

10 kΩ or higher

OK

GO TO STEP 19

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

10.

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.

(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 B1570 is output (DTC B1571 and B15C5 are not output)

B

B

GO TO STEP 14

A

11.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (RED INDICATOR)

(a) Disconnect the O9 roof console box sub-assembly connector.

*a

Component without harness connected

(Roof Console Box Sub-assembly)

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

(c) Connect the positive (+) lead to terminal 7 (IND1) and the negative (-) lead to terminal 12 (GND3) of the roof console box sub-assembly connector.

(d) Check if the illumination for the manual (SOS) switch red indicator comes on.

OK:

Red indicator comes on.

NG

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY

OK

12.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - ROOF CONSOLE BOX SUB-ASSEMBLY)

(a) Disconnect the G9 DCM (Telematics Transceiver) connector.

(b) Disconnect the O9 roof console box sub-assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-26 (SIG-) - O9-12 (GND3)

Always

Below 1 Ω

G9-26 (SIG-) or O9-12 (GND3) - Body ground

Always

10 kΩ or higher

G9-11 (IND1) - O9-7 (IND1)

Always

Below 1 Ω

G9-11 (IND1) or O9-7 (IND1) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

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

PERFORM DCM ACTIVATION

14.

CHECK ROOF CONSOLE BOX SUB-ASSEMBLY (MANUAL (SOS) SWITCH RED INDICATOR CONDITION)

(a) Confirm the red indicator status after the engine switch is turned on (IG).

Click here

Result

Proceed to

Red indicator remains off

A

Red indicator remains on

B

B

GO TO STEP 19

A

15.

INSPECT ROOF CONSOLE BOX SUB-ASSEMBLY (RED INDICATOR INPUT VOLTAGE)

(a) Remove the roof console box sub-assembly but do not disconnect the connectors.

Click here

*a

Component with harness connected

(Roof Console Box Sub-assembly)

(b) Connect the positive lead of a voltmeter to terminal O9-7 (IND1), and the negative lead to terminal O9-12 (GND3).

(c) Measure the voltage.

Standard:

1.0 to 8.5 V for 2 seconds after the engine switch is turned on (IG).

0 V when the engine switch is off.

OK

REPLACE ROOF CONSOLE BOX SUB-ASSEMBLY

NG

16.

INSPECT DCM (TELEMATICS TRANSCEIVER) (RED INDICATOR OUTPUT VOLTAGE)

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

Click here

*a

Component with harness connected

(DCM (Telematics Transceiver))

(b) Connect the positive lead of a voltmeter to terminal G9-11 (IND1), and the negative lead to body ground.

(c) Measure the voltage.

Standard:

1.0 to 8.5 V for 2 seconds after the engine switch is turned on (IG).

0 V when the engine switch is off.

OK

REPAIR OR REPLACE HARNESS OR CONNECTOR

NG

17.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - BODY GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-11 (IND1) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

18.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

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

PERFORM DCM ACTIVATION

19.

REPLACE DCM (TELEMATICS TRANSCEIVER)

(a) Replace the DCM (Telematics Transceiver).

Click here

NOTICE:

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

PERFORM DCM ACTIVATION

    Short in Telephone SUB Antenna Circuit (B1536,B1537)

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