Speaker Circuit: Procedure

CHECK HARNESS AND CONNECTOR

Disconnect the connectors shown in the illustration from the stereo component amplifier assembly, speakers and DCM (telematics transceiver)*1.

*1: w/ Manual (SOS) Switch

Fig 1: P28, P51, M13, M12 And Q21 Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: J101 Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*A	w/ Manual (SOS) Switch
*1	Front view of wire harness connector (to Stereo Component Amplifier Assembly)
*2	Front view of wire harness connector (to Stereo Component Amplifier Assembly)
*3	Front view of wire harness connector (to Front No. 1 Speaker)
*4	Front view of wire harness connector (to Front No. 2 Speaker)
*5	Front view of wire harness connector (to Rear Speaker)
*6	Front view of wire harness connector (to DCM (Telematics Transceiver))

Measure the resistance between each of the front No. 1 speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P51-3 (WFL+) - M13-1	Always	Below 1 Ω
P51-8 (WFL-) - M13-2	Always	Below 1 Ω
P51-10 (WFR+) - L1-1	Always	Below 1 Ω
P51-9 (WFR-) - L1-2	Always	Below 1 Ω

Measure the resistance between the front No. 2 speaker LH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P28-1 (FL+) - M12-1 (+)	Always	Below 1 Ω
P28-5 (FL-) - M12-2 (-)	Always	Below 1 Ω

w/o Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker RH and the stereo component amplifier assembly to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P28-2 (FR+) - L5-1 (+)	Always	Below 1 Ω
P28-6 (FR-) - L5-2 (-)	Always	Below 1 Ω

w/ Manual (SOS) Switch:

Measure the resistance between the stereo component amplifier assembly and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P28-2 (FR+) - J101-2 (SPI+)	Always	Below 1 Ω
P28-6 (FR-) - J101-3 (SPI-)	Always	Below 1 Ω

w/ Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker RH and the DCM (telematics transceiver) to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
J101-5 (SPO+) - L5-1 (+)	Always	Below 1 Ω
J101-6 (SPO-) - L5-2 (-)	Always	Below 1 Ω

Measure the resistance between each of the rear speakers and the stereo component amplifier assembly to check for an open circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P51-4 (RL+) - Q21-1	Always	Below 1 Ω
P51-11 (RL-) - Q21-2	Always	Below 1 Ω
P51-5 (RR+) - P46-1	Always	Below 1 Ω
P51-12 (RR-) - P46-2	Always	Below 1 Ω

Measure the resistance between the stereo component amplifier assembly and body ground to check for a short circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
P51-3 (WFL+) - Body ground	Always	10 kΩ or higher
P51-8 (WFL-) - Body ground	Always	10 kΩ or higher
P51-10 (WFR+) - Body ground	Always	10 kΩ or higher
P51-9 (WFR-) - Body ground	Always	10 kΩ or higher
P51-4 (RL+) - Body ground	Always	10 kΩ or higher
P51-11 (RL-) - Body ground	Always	10 kΩ or higher
P51-5 (RR+) - Body ground	Always	10 kΩ or higher
P51-12 (RR-) - Body ground	Always	10 kΩ or higher
P28-2 (FR+) - Body ground	Always	10 kΩ or higher
P28-6 (FR-) - Body ground	Always	10 kΩ or higher
P28-1 (FL+) - Body ground	Always	10 kΩ or higher
P28-5 (FL-) - Body ground	Always	10 kΩ or higher

w/ Manual (SOS) Switch:

Measure the resistance between the front No. 2 speaker RH and body ground to check for a short circuit in the wire harness.

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
L5-1 (+) - Body ground	Always	10 kΩ or higher
L5-2 (-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

INSPECT FRONT NO. 1 SPEAKER

Resistance check

Fig 3: Front No. 1 Speaker Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
M13-1 - M13-2	Always	3.2 to 4.8 Ω
L1-1 - L1-2	Always	3.2 to 4.8 Ω

TEXT IN ILLUSTRATION

*1	Component without harness connected (Front No. 1 Speaker)

NG → See step 9

OK: Go to next step

INSPECT FRONT NO. 2 SPEAKER

Resistance check

Fig 4: Front No. 2 Speaker Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
M12-1 (+) - M12-2 (-)	Always	3.2 to 4.8 Ω
M12-1 (+) - m12-1 (SQ+)	Always	Below 1 Ω
M12-2 (-) - m12-3 (SQ-)	Always	Below 1 Ω
L5-1 (+) - L5-2 (-)	Always	3.2 to 4.8 Ω
L5-1 (+) - L24-1 (SQ+)	Always	Below 1 Ω
L5-2 (-) - L24-3 (SQ-)	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*1	Component without harness connected (Front No. 2 Speaker)

NG → See step 11

OK: Go to next step

INSPECT FRONT NO. 3 SPEAKER

Resistance check

Fig 5: Front No. 3 Speaker Connector Terminal Identification

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
m12-1 (SQ+) - m12-3 (SQ-)	Always	10 kΩ or higher
L24-1 (SQ+) - L24-3 (SQ-)	Always	10 kΩ or higher

TEXT IN ILLUSTRATION

*1	Component without harness connected (Front No. 3 Speaker)

NG → See step 12

OK: Go to next step

REPLACE FRONT NO. 3 SPEAKER
1. Check that the malfunction disappears when a known good speaker is installed. Refer to REMOVAL .
  OK
  
  Malfunction disappears.
  
  HINT:
  - Connect all the connectors to the front No. 3 speakers that were disconnected.
  - When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.
  - Perform the above inspection on both LH and RH sides.
NG → See step 6

OK → END (FRONT NO. 3 SPEAKER WAS DEFECTIVE)

INSPECT REAR SPEAKER

Resistance check

Fig 6: Rear Speaker Connector Terminal Identification

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

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
Q21-1 - Q21-2	Always	3.2 to 4.8 Ω
P46-1 - P46-2	Always	3.2 to 4.8 Ω

TEXT IN ILLUSTRATION

*1	Component without harness connected (Rear Speaker)

Proceed to the next step based on the inspection result.

RESULT

Condition	Proceed to
OK (w/ Manual (SOS) Switch)	A
OK (w/o Manual (SOS) Switch)	B
NG	C

B → See step 8

C → See step 10

A: Go to next step

INSPECT DCM (TELEMATICS TRANSCEIVER)

Resistance check

Fig 7: J101 Connector Terminal Identification

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

STANDARD RESISTANCE

Tester Connection	Condition	Specified Condition
J101-2 (SPI+) - J101-5 (SPO+)	Always	Below 1 Ω
J101-3 (SPI-) - J101-6 (SPO-)	Always	Below 1 Ω
J101-2 (SPI+) - J101-3 (SPI-)	Always	10 kΩ or higher
J101-5 (SPO+) - J101-6 (SPO-)	Always	10 kΩ or higher
J101-3 (SPI-) - Body ground	Always	10 kΩ or higher
J101-2 (SPI+) - Body ground	Always	10 kΩ or higher

TEXT IN ILLUSTRATION

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

NG → See step 13

OK → See step 8

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
REPLACE FRONT NO. 1 SPEAKER. Refer to REMOVAL
REPLACE REAR SPEAKER. Refer to REMOVAL
REPLACE FRONT NO. 2 SPEAKER. Refer to REMOVAL
REPLACE FRONT NO. 3 SPEAKER. Refer to REMOVAL
REPLACE DCM (TELEMATICS TRANSCEIVER). Refer to REMOVAL