AUDIO AND VISUAL SYSTEM(for Radio and Display Type) Speaker Circuit

DESCRIPTION

*1: for 6 Speakers
*2: for 9 Speakers

The sound signals amplified by the radio and display receiver assembly*1 or stereo component amplifier assembly*2 are sent to the speakers from the radio and display receiver assembly*1 or stereo component amplifier assembly*2 via the speaker circuit.

If there is a short in a speaker circuit, the radio and display receiver assembly*1 or stereo component amplifier assembly*2 detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is not a malfunction in the radio and display receiver assembly*1 or stereo component amplifier assembly*2 or speakers.

WIRING DIAGRAM

PROCEDURE

CHECK VEHICLE CONDITION (SPEAKER TYPE)

Check the vehicle condition.

Result
Result	Proceed to
for 6 Speakers	A
for 9 Speakers	B

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT) Click here

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side
*2: for LH Side

Disconnect the F122 and F120 radio and display receiver assembly connectors.
Disconnect the F13*1 and/or F14*2 front No. 1 speaker assembly connector.
Disconnect the F7*1 and/or F8*2 front No. 2 speaker assembly connector.

Disconnect the J18*1 and/or J19*2 rear speaker set connector.

Standard Resistance

RH Side
Tester Connection	Condition	Specified Condition
F120-1 (FR+) - F7-1 (+)	Always	Below 1 Ω
F120-5 (FR-) - F7-3 (-)	Always	Below 1 Ω
F7-2 (TWR+) - F13-1	Always	Below 1 Ω
F7-4 (TWR-) - F13-2	Always	Below 1 Ω
F122-1 (RR+) - J18-1	Always	Below 1 Ω
F122-3 (RR-) - J18-2	Always	Below 1 Ω
F120-1 (FR+) - Body ground	Always	10 kΩ or higher
F120-5 (FR-) - Body ground	Always	10 kΩ or higher
F7-2 (TWR+) - Body ground	Always	10 kΩ or higher
F7-4 (TWR-) - Body ground	Always	10 kΩ or higher
F122-1 (RR+) - Body ground	Always	10 kΩ or higher
F122-3 (RR-) - Body ground	Always	10 kΩ or higher

LH Side
Tester Connection	Condition	Specified Condition
F120-2 (FL+) - F8-1 (+)	Always	Below 1 Ω
F120-6 (FL-) - F8-3 (-)	Always	Below 1 Ω
F8-2 (TWL+) - F14-1	Always	Below 1 Ω
F8-4 (TWL-) - F14-2	Always	Below 1 Ω
F122-2 (RL+) - J19-1	Always	Below 1 Ω
F122-6 (RL-) - J19-2	Always	Below 1 Ω
F120-2 (FL+) - Body ground	Always	10 kΩ or higher
F120-6 (FL-) - Body ground	Always	10 kΩ or higher
F8-2 (TWL+) - Body ground	Always	10 kΩ or higher
F8-4 (TWL-) - Body ground	Always	10 kΩ or higher
F122-2 (RL+) - Body ground	Always	10 kΩ or higher
F122-6 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
1. Remove the front No. 1 speaker assembly Click here.
2. Inspect the front No. 1 speaker assembly Click here.
NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

OK
CHECK FRONT NO. 2 SPEAKER ASSEMBLY
1. Replace the front No. 2 speaker with a known good one Click here.
2. Check that the malfunction disappears.
  Tech Tips
  - Connect all the connectors that were disconnected from the front No. 2 speaker assemblies.
  - 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.
  OK
  
  Malfunction disappears.
OK
END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
INSPECT REAR SPEAKER SET
1. Remove the rear speaker set Click here.
2. Inspect the rear speaker set Click here.
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

NG
REPLACE REAR SPEAKER SET Click here

OK
Malfunction disappears.

CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

*1: for RH Side
*2: for LH Side

Disconnect the F74 stereo component amplifier assembly connector.
Disconnect the I1*1 and/or I10*2 front No. 1 speaker assembly connector.
Disconnect the F7*1 and/or F8*2 front No. 2 speaker assembly connector.
Disconnect the F13*1 and/or F14*2 front No. 3 speaker assembly connector.
Disconnect the F6 front No. 4 speaker assembly connector.

Disconnect the J18*1 and/or J19*2 rear speaker set connector.

Standard Resistance

for Front No. 4 Speaker Assembly
Tester Connection	Condition	Specified Condition
F74-7 (CTR+) - F6-1	Always	Below 1 Ω
F74-22 (CTR-) - F6-2	Always	Below 1 Ω
F74-7 (CTR+) - Body ground	Always	10 kΩ or higher
F74-22 (CTR-) - Body ground	Always	10 kΩ or higher

RH Side
Tester Connection	Condition	Specified Condition
F74-5 (WFR+) - I1-1	Always	Below 1 Ω
F74-20 (WFR-) - I1-2	Always	Below 1 Ω
F74-13 (FR+) - F7-1 (+)	Always	Below 1 Ω
F74-28 (FR-) - F7-3 (-)	Always	Below 1 Ω
F7-2 (TWR+) - F13-1	Always	Below 1 Ω
F7-4 (TWR-) - F13-2	Always	Below 1 Ω
F74-15 (RR+) - J18-1	Always	Below 1 Ω
F74-30 (RR-) - J18-2	Always	Below 1 Ω
F74-5 (WFR+) - Body ground	Always	10 kΩ or higher
F74-20 (WFR-) - Body ground	Always	10 kΩ or higher
F74-13 (FR+) - Body ground	Always	10 kΩ or higher
F74-28 (FR-) - Body ground	Always	10 kΩ or higher
F7-2 (+TWR) - Body ground	Always	10 kΩ or higher
F7-4 (TWR-) - Body ground	Always	10 kΩ or higher
F74-15 (RR+) - Body ground	Always	10 kΩ or higher
F74-30 (RR-) - Body ground	Always	10 kΩ or higher

LH Side
Tester Connection	Condition	Specified Condition
F74-4 (WFL+) - I10-1	Always	Below 1 Ω
F74-19 (WFL-) - I10-2	Always	Below 1 Ω
F74-12 (FL+) - F8-1 (+)	Always	Below 1 Ω
F74-27 (FL-) - F8-3 (-)	Always	Below 1 Ω
F8-2 (TWL+) - F14-2	Always	Below 1 Ω
F8-4 (TWL-) - F14-1	Always	Below 1 Ω
F74-14 (RL+) - J19-1	Always	Below 1 Ω
F74-29 (RL-) - J19-2	Always	Below 1 Ω
F74-4 (WFL+) - Body ground	Always	10 kΩ or higher
F74-19 (WFL-) - Body ground	Always	10 kΩ or higher
F74-12 (FL+) - Body ground	Always	10 kΩ or higher
F74-27 (FL-) - Body ground	Always	10 kΩ or higher
F8-2 (TWL+) - Body ground	Always	10 kΩ or higher
F8-4 (TWL-) - Body ground	Always	10 kΩ or higher
F74-14 (RL+) - Body ground	Always	10 kΩ or higher
F74-29 (RL-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT FRONT NO. 1 SPEAKER ASSEMBLY
1. Remove the front No. 1 speaker assembly Click here.
2. Inspect the front No. 1 speaker assembly Click here.
NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

OK
CHECK FRONT NO. 2 SPEAKER ASSEMBLY
1. Replace the front No. 2 speaker with a known good one Click here.
2. Check that the malfunction disappears.
  Tech Tips
  - Connect all the connectors that were disconnected from the front No. 2 speaker assemblies.
  - 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.
  OK
  
  Malfunction disappears.
OK
END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
CHECK FRONT NO. 4 SPEAKER ASSEMBLY
1. Replace the front No. 4 speaker with a known good one Click here.
2. Check that the malfunction disappears.
  
  Tech Tips
  
  Connect all the connectors that were disconnected from the front No. 4 speaker assemblies.
  
  OK
  
  Malfunction disappears.
OK
END (FRONT NO. 4 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
CHECK FRONT NO. 3 SPEAKER ASSEMBLY
1. Replace the front No. 3 speaker with a known good one Click here.
2. Check that the malfunction disappears.
  Tech Tips
  - Connect all the connectors that were disconnected from the front No. 3 speaker assemblies.
  - 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.
  OK
  
  Malfunction disappears.
OK
END (FRONT NO. 3 SPEAKER ASSEMBLY IS DEFECTIVE)

NG
INSPECT REAR SPEAKER SET
1. Remove the rear speaker set Click here.
2. Inspect the rear speaker set Click here.
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

NG
REPLACE REAR SPEAKER SET Click here