1986 TOYOTA LAND CRUISER radio

24 Power AmplifierPOWER COMIMG IN, BUT WOOFER (POWER) AMPLIFIER NOT
OPERATING
+ B wire harness faulty.
GND faulty.
ACC wire harness faulty.
Speaker wire harness faulty. GND faulty. Is tape player operating normally?
Check if ACC fuse is OK?Ye s
NG
No OK No
No
No
No OK
OK
OK Ye s
Ye s
Ye s
Ye sNG
NG
NG Check if RADIO, AMP fuse is OK?
Radio assembly faulty. Recheck system after repair.Replace fuse.
ACC wire harness faulty. Radio assembly faulty.
Replace fuse.
Is there continuity in speaker wire harness?
Temporarily install another speaker. Functions OK?
Hiss noise from speaker?Ye s
Ye s NoNo
No Ye s+B wire harness faulty.
Power amplifier faulty.
Recheck system after repair. Speaker faulty.
Is power supplied to ACC terminal of power amplifier?
Check if GND (wire harness side) of power amplifier
grounded normally? Is power supplied to +B terminal of power amplifier?
Is power supplied to ACC terminal of radio assembly?
Is power supplied to +B terminal of radio assembly?
Check if GND (wire harness side) of radio assembly
grounded normally?
- BODY ELECTRICALAUDIO SYSTEM
BE-165
2538 Author
: Date
:
2004 LAND CRUISER (RM1071U)

Radio assembly faulty.
Power amplifier faulty.
Recheck system after repair. Temporarily install another speaker.
Function OK?25 Power Amplifier ANY SPEAKER DOES NOT WORK
Speaker wire harness faulty.
Speaker faulty. Is hiss noise produced by non-functioning speaker?
Does continuity exist in speaker wire harness? Is radio operating normally?
Ye sYe s
Ye s
Ye s No
No
NoNoRadio assembly faulty.
Recheck system after repair. BE-166
- BODY ELECTRICALAUDIO SYSTEM
2539 Author
: Date
:
2004 LAND CRUISER (RM1071U)

26 Noise NOISE OCCURS
No
Ye s Does the noise occur only in the radio?
Does the noise occur in a particular place?
Is there any additional installation part
around the glass imprinted antenna?
(Sun shade film, telephone antenna etc.)
Does the noise occur even pulling out the
antenna cord from the radio?
Does the noise occur even after pulling out the
antenna terminal on the glass surface?
Isn't there any adhesive (Butyl rubber)
stuck on the bases of the antenna
terminal, defogger terminal and bus bar?
Does the condition get better by replacing
the antenna cord.
Noise rediates directly to the antenna from the
generation source.Replace the antenna cord. Failure of glass installation.
Must plane the butyl rubber. Noise mixing into the antenna cable. Check the radio. Influence of the film or the noise radiation
of the additional installation part. Does the noise stop by removing it? An electric environment.Refer to No.27. (It occurs in the cassette and CD.)
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s No
No
No
No
No
No
- BODY ELECTRICALAUDIO SYSTEM
BE-167
2540 Author
: Date
:
2004 LAND CRUISER (RM1071U)

27 Noise NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING
No
Ye s Is radio assembly properly installed?
Noise is produced from static eletricity accumulating in the vehicle body. With vehicles stationary lightly tap each system.
Is noise produced?Install properly.
Each system faulty. Is speaker properly installed?
No
No Ye s
Ye s
28 Noise NOISE PRODUCED WHEN ENGINE STARTS
NoYe s Whistling noise which becomes high-pitched when
accelerator strongly depressed, disappears shortly
after engine stops.Generator noise.
A/C noise.
Fuel gauge noise.
Horn noise.
Ignition noise.
Turn signal noise.
Washer noise.
Engine coolant temp. gauge noise.
Wiper noise. Whining noise occurs when A/C is operating.
Scratching noise occurs during sudden acceleration, driving on rough
roads or when ignition switch is turned ON.
Clicking sound is heard when horn button is pressed, then
released. Whirring/grating sound is heard when pushed
continuously.
Murmuring sound stops when engine stops.
Tick-tack noise occurs in co-ordination with blinking
offlasher.
Noise occurs during window washer operation.
Scratching noise occurs while engine is running,
and continues a while even after engine stops.
Scraping noise in line with wiper beat.
Other type of noiseYe s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s No
No
No
No
No
No
No
No
BE-168
- BODY ELECTRICALAUDIO SYSTEM
2541 Author
: Date
:
2004 LAND CRUISER (RM1071U)

29 Steering Pad SwitchA AUDIO SYSTEM CANNOT BE OPERATED WITH STEERING PAD
SWITCH
No
Ye s Resistance of steering pad switch is OK?Steering pad switch faulty.
Wire harness faulty. Is wire harness between radio assembly and steering pad
switch OK?
No
Ye s
30 Rear Seat AudioQUALITY OF SOUND FROM HEADPHONE TERMINAL IS POOR OR NO SOUND
CAN BE HEARD
NoYe s Temporarity install another headphone. Function OK?Headphone faulty.
Wire harness faulty.
RSA panel faulty. Is wire harness between radio assembly and RSA
panel OK?
Ye s
No
Radio assembly faulty.
Temporarity install another RSA panel. Function OK?
Radio assembly faulty.
No
Ye s
- BODY ELECTRICALAUDIO SYSTEM
BE-169
2542 Author
: Date
:
2004 LAND CRUISER (RM1071U)

BE01I-05
- BODY ELECTRICALBODY ELECTRICAL SYSTEM
BE-1
2374 Author
: Date
:
2004 LAND CRUISER (RM1071U)
BODY ELECTRICAL SYSTEM
PRECAUTION
HINT:
Take care to observe the following precautions when performing inspections or removal and replacement
of body electrical related parts.
1. HEADLIGHT SYSTEM
Halogen bulbs have pressurized gas inside and require special handling. They can burst if scratched or
dropped. Hold a bulb only by its plastic or metal case. Don't touch the glass part of a bulb with bare hands.
2. SRS (SUPPLEMENTAL RESTRAINT SYSTEM)
The LAND CRUISER is equipped with an SRS (Supplemental Restraint System) such as the driver airbag
and front passenger airbag. Failure to carry out service operation in the correct sequence could cause the
SRS to unexpectedly deploy during servicing, possibly leading to a serious accident. Before servicing (in-
cluding removal or installation of parts, inspection or replacement), be sure to read the precautionary notices
in the RS section.
3. AUDIO SYSTEM

If the negative (-) terminal cable is disconnected from the battery, the preset AM, FM 1 and FM 2 sta-
tions stored in memory are erased, so be sure to note the stations and reset them after the negative
(-) terminal cable is reconnected to the battery.

If the negative (-) terminal cable is disconnected from the battery, the ºANTI-THEFT SYSTEMº will
operate when the cable is reconnected, but the radio, tape player and CD player will not operate. Be
sure to input the correct ID number so that the radio, tape player and CD player can be operated again.
4. MOBILE COMMUNICATION SYSTEM
If the vehicle is equipped with a mobile communication system, refer to precautions in the IN section.

I25274
Cowl Side J/B RH (Back Side):
IG1 No.3 Relay
ACC CUT Relay BE-26
- BODY ELECTRICALPOWER SOURCE
2399 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(a) Remove the fuse from the junction block and inspect the
connector on junction block side.
Fuse Tester connectionConditionSpecified condition
P/W (RL) 2 - GroundConstantBattery positive voltage
P/W (FL) 4 - GroundConstantBattery positive voltage
VGRS 2 - GroundConstantBattery positive voltage
DOME 5 - GroundConstantBattery positive voltage
RADIO 7 - GroundConstantBattery positive voltage
WASHER 10 - GroundIgnition switch ONBattery positive voltage

I24923
Cowl Side J/B RH
Relays:
A. ACC CUT
B. IG1 NO.3
C. POWER MAIN Fuses:
1. P/W (RL)
2. P/W (FL)
3. VGRS
4. DOME
5. RADIO
6. WASHER
7. DIFF
8. ECU-B2
9. P/W(FR)
10.P/W(RR)
11. SECURITY
12. IGN
13. MET
14. GAUGE 2
15. SEAT HTR
16. ECU-IG2
17. WIPER
18. RH SEAT
19. RR A/C
20. TIL&TEL
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16 17
18 19 20 21 22
BA
BE-14
- BODY ELECTRICALPOWER SOURCE
2387 Author
: Date
:
2004 LAND CRUISER (RM1071U)