BE1MR−01
−
BODY ELECTRICAL AUDIO SYSTEM
BE−73
1996 LAND CRUISER (RM451U)
TROUBLESHOOTING
NOTICE:
When replacing the internal mechanism (computer part) of the audio system, be careful that no part
of your body or clothes comes in contact with the terminals of the leads from the IC, etc. of the re-
placement part (spare part).
HINT:
This inspection procedure is a simple troubleshooting which should be carried\
out on the vehicle during sys-
tem operation and is based on the assumption that the cause of trouble lies\
with the system components
(except for the wires and connectors, etc.).
Always inspect the trouble taking the following items into consideration\
.
Open or short circuit of the wire harness
Connector or terminal connection fault
ProblemNo.
RadioNo power coming in.1
Power coming in, but radio not operating.2
Noise present, but AM − FM not operating.3
Either speaker does not work.4
Either AM or FM does not work.5
Reception poor (Volume faint).5
Few preset tuning bands.5
Sound quality poor.6
Cannot set station select button.7
Preset memory disappears.7
Tape PlayerCassette tape cannot be inserted.8
Cassette tape inserts, but no power.9
Power coming in, but tape player not operating.10
Either speaker does not work.11
Sound quality poor (Volume faint).12
Tape jammed, malfunction with tape speed or auto − reverse.13
APS, SKIP, RPT buttons not operating.14
Cassette tape will not eject.15
CD PlayerCD cannot be inserted.16
CD inserts, but no power.17
Power coming in, but CD player not operating.18
Sound jumps.19
Sound quality poor (Volume faint).20
Either speaker does not work.21
CD will not eject.22
AntennaAntenna does not fully extend of fully retract.23
Antenna − related.24
NoiseNoise produced by vibration or shock while driving.25
Noise produced when engine starts.26
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DI−136
−
DIAGNOSTICS AUTOMATIC TRANSMISSION
1996 LAND CRUISER (RM451U)
If the lock−up is defective:
Lock−up solenoid is stuck.
Lock−up control valve is stuck.
Lock−up signal value is stuck.
(2) In the same way, check the shock and slip at the 1 → 2, 2 →3 and 3 → O/D up−shift.
Evaluation:
If the shock is excessive:
Line pressure is too high.
Accumulator is defective.
Check ball is defective. (3) Run at the D position lock −up or O/D gear and check for abnormal noise and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be made with \
extreme care as it could also
be due to loss of balance in the propeller shaft, differential, torque converter clutch, etc.
(4) While running in the D position, 2nd, 3rd and O/D gears, check to see that the\
possible kick −down
vehicle speed limits for 2 →1, 3 → 2 and O/D →3 kick−downs conform to those indicated on
the automatic shift schedule.
(5) Check for abnormal shock and slip at kick −down.
(6) Check for the lock −up mechanism.
Drive in D position, O/D gear, at a steady speed (lock −up ON) of about 95 km/h (59 mph).
Lightly depress the accelerator pedal and check that the engine RPM does not change
abruptly.
If there is a big jump in engine RPM, there is no lock −up.
(b) 2 position test. Shift into the 2 position and, while driving with the accelerator pedal held \
constantly at the full throttle
valve opening position, push in one of the pattern selectors and check the fo\
llowing points:
HINT:
When the 2nd start switch is on, there is no 1 → 2 up−shift and 2 →1 down−shift.
(1) Check to see that the 1 → 2 up− shift takes place and that the shift point conforms to the automatic
shift schedule.
HINT:
There is no O/D up−shift and lock−up in the 2 position. (2) While running in the 2 position and 2nd ge ar, release the accelerator pedal and check the engine
braking effect.
Evaluation:
If there is no engine braking effect:
2nd coast brake is defective. (3) Check for abnormal noise at acceleration and deceleration, and for shock at up −shift and down −
shift.
(c) L position test. (1) While running in the L position, check to see that there is no up −shift to 2nd gear.
(2) While running in the L position, release the accelerator pedal and check the engine braking ef- fect.
Evaluation:
If there is no engine braking effect:
1stand reverse brake is defective. (3) Check for abnormal noise during acceleration and deceleration.
(d) R position test. Shift into the R position and fully depress the accelerator pedal and ch\
eck for slipping.
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