Sound Signal Circuit between Navigation Receiver Assembly and Stereo Component Amplifier [10/2014 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for 9 Speakers (w/o Manual (SOS) Switch)	A
   for 11 Speakers	A
   for 9 Speakers (w/ Manual (SOS) Switch)	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Disconnect the I6 and I7 navigation ECU sub-assembly connectors (for 9 Speakers).
2. Disconnect the I6 navigation ECU sub-assembly connector (for 11 Speakers).
3. Disconnect the E8 stereo component amplifier assembly connector (for 9 Speakers).
4. Disconnect the E9 stereo component amplifier assembly connector (for 11 Speakers).
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR 9 SPEAKERS
   
   

   Tester Connection	Condition	Specified Condition
   I6-1 (FR+) - E8-2 (FR+)	Always	Below 1 Ω
   I6-5 (FR-) - E8-7 (FR-)	Always	Below 1 Ω
   I6-2 (FL+) - E8-1 (FL+)	Always	Below 1 Ω
   I6-6 (FL-) - E8-6 (FL-)	Always	Below 1 Ω
   I7-1 (RR+) - E8-9 (RR+)	Always	Below 1 Ω
   I7-3 (RR-) - E8-10 (RR-)	Always	Below 1 Ω
   I7-2 (RL+) - E8-3 (RL+)	Always	Below 1 Ω
   I7-6 (RL-) - E8-8 (RL-)	Always	Below 1 Ω
   I6-1 (FR+) - Body ground	Always	10 kΩ or higher
   I6-5 (FR-) - Body ground	Always	10 kΩ or higher
   I6-2 (FL+) - Body ground	Always	10 kΩ or higher
   I6-6 (FL-) - Body ground	Always	10 kΩ or higher
   I7-1 (RR+) - Body ground	Always	10 kΩ or higher
   I7-3 (RR-) - Body ground	Always	10 kΩ or higher
   I7-2 (RL+) - Body ground	Always	10 kΩ or higher
   I7-6 (RL-) - Body ground	Always	10 kΩ or higher

   FOR 11 SPEAKERS
   
   

   Tester Connection	Condition	Specified Condition
   I6-1 (FR+) - E9-5 (R+)	Always	Below 1 Ω
   I6-5 (FR-) - E9-4 (R-)	Always	Below 1 Ω
   I6-2 (FL+) - E9-3 (L+)	Always	Below 1 Ω
   I6-6 (FL-) - E9-2 (L-)	Always	Below 1 Ω
   E9-6 (SLD) - Body ground	Always	10 kΩ or higher
   E9-5 (R+) - Body ground	Always	10 kΩ or higher
   E9-4 (R-) - Body ground	Always	10 kΩ or higher
   E9-3 (L+) - Body ground	Always	10 kΩ or higher
   E9-2 (L-) - Body ground	Always	10 kΩ or higher

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the I6 and I7 navigation ECU sub-assembly connectors.
2. Disconnect the E8 stereo component amplifier assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I6-2 (FL+) - E8-1 (FL+)	Always	Below 1 Ω
   I6-6 (FL-) - E8-6 (FL-)	Always	Below 1 Ω
   I7-1 (RR+) - E8-9 (RR+)	Always	Below 1 Ω
   I7-3 (RR-) - E8-10 (RR-)	Always	Below 1 Ω
   I7-2 (RL+) - E8-3 (RL+)	Always	Below 1 Ω
   I7-6 (RL-) - E8-8 (RL-)	Always	Below 1 Ω
   I6-2 (FL+) - Body ground	Always	10 kΩ or higher
   I6-6 (FL-) - Body ground	Always	10 kΩ or higher
   I7-1 (RR+) - Body ground	Always	10 kΩ or higher
   I7-3 (RR-) - Body ground	Always	10 kΩ or higher
   I7-2 (RL+) - Body ground	Always	10 kΩ or higher
   I7-6 (RL-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Disconnect the I6 navigation ECU sub-assembly connector.
2. Disconnect the I135 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I6-1 (FR+) - I135-2 (SPI+)	Always	Below 1 Ω
   I6-5 (FR-) - I135-3 (SPI-)	Always	Below 1 Ω
   I6-1 (FR+) - Body ground	Always	10 kΩ or higher
   I6-5 (FR-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Disconnect the E8 stereo component amplifier assembly connector.
2. Disconnect the I135 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E8-2 (FR+) - I135-5 (SPO+)	Always	Below 1 Ω
   E8-7 (FR-) - I135-6 (SPO-)	Always	Below 1 Ω
   E8-2 (FR+) - Body ground	Always	10 kΩ or higher
   E8-7 (FR-) - Body ground	Always	10 kΩ or higher

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

1. Remove the DCM (telematics transceiver).
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2 (SPI+) - 5 (SPO+)	Always	Below 1 Ω
   3 (SPI-) - 6 (SPO-)	Always	Below 1 Ω
   2 (SPI+) - 3 (SPI-)	Always	10 kΩ or higher
   5 (SPO+) - 6 (SPO-)	Always	10 kΩ or higher
   2 (SPI+) - Body ground	Always	10 kΩ or higher
   3 (SPI-) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (DCM (Telematics Transceiver))

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 10/2015] or HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )

Result: 

NG 

REPLACE DCM (TELEMATICS TRANSCEIVER) 

(Refer to REMOVAL [10/2014 - ] )