Toyota Tacoma (2015-2018) Service Manual: Speaker Circuit
DESCRIPTION
- If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.
- Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.
- If a short is detected in a speaker circuit, no sound can be heard from the speakers.
WIRING DIAGRAM
(See page .gif)
).
PROCEDURE
|
1. |
CONFIRM MODEL |
(a) Choose the model to be inspected.
Result|
Result |
Proceed to |
|---|---|
|
for 6 Speakers |
A |
|
for 4 Speakers |
B |
| B | .gif) |
GO TO STEP 9 |
|
.gif)
|
2. |
CHECK SPEAKER |
|
(a) Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check (See page
|
|
.png)
(b) Perform the operation check above and determine the speaker that is not operating.
Result|
Not Operating Speaker |
Proceed to |
|---|---|
|
Front No. 1 speaker assembly or front No. 2 speaker assembly |
A |
|
Rear speaker assembly |
B |
HINT:
If sound cannot be heard from any speaker, inspect all of them.
| B | |
GO TO STEP 7 |
|
|
3. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY) |
(a) Disconnect the R30 radio and display receiver assembly connector.
(b) Disconnect the S46 and S47 front No. 2 speaker assembly connectors.
(c) Disconnect the S15 and S16 front No. 1 speaker assembly connectors.
(d) Measure the resistance between the radio and display receiver assembly and each of the front No. 2 speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R30-1 (FR+) - S47-2 (+) |
Always |
Below 1 Ω |
|
R30-5 (FR-) - S47-4 (-) |
Always |
Below 1 Ω |
|
R30-2 (FL+) - S46-2 (+) |
Always |
Below 1 Ω |
|
R30-6 (FL-) - S46-4 (-) |
Always |
Below 1 Ω |
(e) Measure the resistance between each of the front No. 2 speaker assemblies and the front No. 1 speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S47-1 (+) - S16-1 |
Always |
Below 1 Ω |
|
S47-3 (-) - S16-2 |
Always |
Below 1 Ω |
|
S46-1 (+) - S15-1 |
Always |
Below 1 Ω |
|
S46-3 (-) - S15-2 |
Always |
Below 1 Ω |
(f) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R30-1 (FR+) - Body ground |
Always |
10 kΩ or higher |
|
R30-5 (FR-) - Body ground |
Always |
10 kΩ or higher |
|
R30-2 (FL+) - Body ground |
Always |
10 kΩ or higher |
|
R30-6 (FL-) - Body ground |
Always |
10 kΩ or higher |
(g) Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S47-1 (+) - Body ground |
Always |
10 kΩ or higher |
|
S47-3 (-) - Body ground |
Always |
10 kΩ or higher |
|
S46-1 (+) - Body ground |
Always |
10 kΩ or higher |
|
S46-3 (-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
INSPECT FRONT NO.2 SPEAKER ASSEMBLY |
(a) Remove the front No. 2 speaker assembly (See page
).
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
.png)
| NG | |
REPLACE FRONT NO.2 SPEAKER ASSEMBLY |
|
|
5. |
REPLACE FRONT NO.2 SPEAKER ASSEMBLY |
(a) Check that the malfunction disappears when a known good speaker is installed
(See page ).
OK:
Malfunction disappears.
HINT:
- Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
- When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
- Perform the above inspection on both the LH and RH side.
| OK | |
END |
|
|
6. |
INSPECT FRONT NO.1 SPEAKER ASSEMBLY |
(a) Remove the front No. 1 speaker assembly (See page
).
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPLACE FRONT NO.1 SPEAKER ASSEMBLY |
|
7. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY) |
(a) Disconnect the R29 radio and display receiver assembly connector.
(b) Disconnect the S18 and S17 rear speaker assembly connectors.
(c) Measure the resistance between the radio and display receiver assembly and each of the rear speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R29-1 (RR+) - S18-1 |
Always |
Below 1 Ω |
|
R29-3 (RR-) - S18-2 |
Always |
Below 1 Ω |
|
R29-2 (RL+) - S17-1 |
Always |
Below 1 Ω |
|
R29-1 (RL-) - S17-2 |
Always |
Below 1 Ω |
(d) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R29-1 (RR+) - Body ground |
Always |
10 kΩ or higher |
|
R29-3 (RR-) - Body ground |
Always |
10 kΩ or higher |
|
R29-2 (RL+) - Body ground |
Always |
10 kΩ or higher |
|
R29-6 (RL-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
INSPECT REAR SPEAKER ASSEMBLY |
(a) Remove the rear speaker assembly (See page
).
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPLACE REAR SPEAKER ASSEMBLY |
|
9. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY) |
(a) Disconnect the R30 radio and display receiver assembly connector.
(b) Disconnect the S46 and S47 front No. 2 speaker assembly connectors.
(c) Disconnect the S15 and S16 front No. 1 speaker assembly connectors.
(d) Measure the resistance between the radio and display receiver assembly and each of the front No. 2 speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R30-1 (FR+) - S47-2 (+) |
Always |
Below 1 Ω |
|
R30-5 (FR-) - S47-4 (-) |
Always |
Below 1 Ω |
|
R30-2 (FL+) - S46-2 (+) |
Always |
Below 1 Ω |
|
R30-6 (FL-) - S46-4 (-) |
Always |
Below 1 Ω |
(e) Measure the resistance between each of the front No. 2 speaker assemblies and the front No. 1 speaker assemblies to check for an open circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S47-1 (+) - S16-1 |
Always |
Below 1 Ω |
|
S47-3 (-) - S16-2 |
Always |
Below 1 Ω |
|
S46-1 (+) - S15-1 |
Always |
Below 1 Ω |
|
S46-3 (-) - S15-2 |
Always |
Below 1 Ω |
(f) Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
R30-1 (FR+) - Body ground |
Always |
10 kΩ or higher |
|
R30-5 (FR-) - Body ground |
Always |
10 kΩ or higher |
|
R30-2 (FL+) - Body ground |
Always |
10 kΩ or higher |
|
R30-6 (FL-) - Body ground |
Always |
10 kΩ or higher |
(g) Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
S47-1 (+) - Body ground |
Always |
10 kΩ or higher |
|
S47-3 (-) - Body ground |
Always |
10 kΩ or higher |
|
S46-1 (+) - Body ground |
Always |
10 kΩ or higher |
|
S46-3 (-) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
10. |
INSPECT FRONT NO.2 SPEAKER ASSEMBLY |
(a) Remove the front No. 2 speaker assembly (See page
).
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | |
REPLACE FRONT NO.2 SPEAKER ASSEMBLY |
|
|
11. |
REPLACE FRONT NO.2 SPEAKER ASSEMBLY |
(a) Check that the malfunction disappears when a known good speaker is installed
(See page ).
OK:
Malfunction disappears.
HINT:
- Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.
- When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.
- Perform the above inspection on both the LH and RH side.
| OK | |
END |
|
|
12. |
INSPECT FRONT NO.1 SPEAKER ASSEMBLY |
(a) Remove the front No. 1 speaker assembly (See page
).
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
| NG | |
REPLACE FRONT NO.1 SPEAKER ASSEMBLY |
Parking Brake Switch Circuit
DESCRIPTION
This circuit is from the parking brake switch assembly to the radio and display
receiver assembly.
WIRING DIAGRAM
PROCEDURE
1.
CHECK VEHICLE SIGNAL
...
Sound Signal Circuit between Radio Receiver and Stereo Jack Adapter
DESCRIPTION
The No. 1 stereo jack adapter assembly sends the sound signal from an external
device to the radio and display receiver assembly via this circuit.
If there is an open or short in the c ...
Other materials:
Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0142)
DESCRIPTION
These DTCs are stored if there is a malfunction in the CAN communication system
connected to the blind spot monitor sensor.
HINT:
If CAN communication system DTCs are stored, they may also be stored for other
systems.
DTC Code
DTC Detection Condition
...
Blind Spot Monitor Master Module Beam Axis Inspection Incomplete (C1ABB)
DESCRIPTION
This DTC is stored when a beam axis inspection has not been performed for the
blind spot monitor sensor LH.
HINT:
This DTC is always stored after replacing a blind spot monitor sensor. The purpose
of this DTC is to ensure that beam axis inspection is performed. Completing the
be ...
Inspection
INSPECTION
PROCEDURE
1. INSPECT BRAKE DRUM INSIDE DIAMETER
(a) Using a brake drum gauge or equivalent, measure the inside diameter of the
drum.
Standard inside diameter:
254 mm (10.00 in.)
Maximum inside diameter:
256 mm (10.08 in.)
If the inside diameter is greater than the maximum, r ...
