check engine TOYOTA T100 1996 Factory Service Manual

Downloaded from www.Manualslib.com manuals search engine Z14871
Unlock
16
BE2595 N02970
BE−54
− BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
1996 TOYOTA T100 (RM449U) 7 − Ground
Passenger’s door courtesy switch OFF
(Door closed)No continuity
7 − GroundPassenger’s door courtesy switch ON
(Door opened)Continuity
9 − GroundDriver’s door lock switch UNLOCKContinuity
9 − GroundDriver’s door lock switch LOCKNo continuity
10 − GroundDriver’s key lock and unlock switch Lock or OFFNo countinuity
10 − GroundDriver’s key lock and unlock switch UNLOCKCountinuity
11 − GroundConstantContinuity
12 − GroundPassenger’s door lock switch UNLOCKContinuity
12 − GroundPassenger’s door lock switch LOCKNo continuity
14 − GroundDriver’s door courtesy switch OFF (Door closed)No continuity
14 − GroundDriver’s door courtesy switch ON (Door opened)Continuity
2 − GroundConstantBattery positive voltage
8 − GroundIgnition switch LOCK or ACCNo voltage
8 − GroundIgnition switch ONBattery positive voltage
13 − GroundKey unlock warning switch OFF
(Ignition key removed)No voltage
13 − GroundKey unlock warning switch ON (Ignition key set)Battery positive voltage
If circuit is as specified, inspect the door lock signal and key−off
power window signal.
9. Door Lock Signal:
INSPECT DOOR LOCK CONTROL RELAY
HINT:
When the relay circuit is as specified, inspect the door lock sig-
nal.
(a) Connect the connector to the relay.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 1 and the negative (−) lead to terminal 6.
(c) Set the door lock control switch to UNLOCK, check that
the voltage rises from 0 V to battery positive voltage for
approximately 0.2 seconds.

Downloaded from www.Manualslib.com manuals search engine Z14872
Lock
16
BE2595 N02427
I02177
(c) Close(d) Open
Z08642
5
11
BE2886 N03190R
− BODY ELECTRICALPOWER DOOR LOCK CONTROL SYSTEM
BE−55
1996 TOYOTA T100 (RM449U)
(d) Reverse the polarity of the voltmeter leads.
(e) Set the door lock control switch to LOCK, check that the
voltage rises from 0 V to battery positive voltage for
approximately 0.2 seconds.
If operation is not as specified, replace the relay.
10. Key−off Power Window Signal:
INSPECT DOOR LOCK CONTROL RELAY
HINT:
When the relay circuit is as specified, inspect the key−off power
window signal.
(a) Connect the connector to the relay.
(b) Connect the positive (+) lead from the voltmeter to termi-
nal 5 and the negative (−) lead to terminal 11.
(c) Close the door with ignition switch turned to LOCK or
ACC, check that the meter needle indicates battery posi-
tive voltage.
(d) Open the door, check that the meter needle indicates 0 V.
(e) Turn the ignition switch ON, check that the meter needle
indicate battery positive voltage again.
If operation is not as specified, replace the relay.

Downloaded from www.Manualslib.com manuals search engine BE03H−03
Z09299
Left/Light
Adjustment
Switch
Control Switch
Z04379
Z04380
− BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE−57
1996 TOYOTA T100 (RM449U)
INSPECTION
1. INSPECT MIRROR SWITCH CONTINUITY
Left side:
Switch positionTester connectionSpecified condition
UP3 − 4
1 − 8Continuity
DOWN1 − 3
4 − 8Continuity
LEFT3 − 4
1 − 7Continuity
RIGHT1 − 3
4 − 7Continuity
Right side:
Switch positionTester connectionSpecified condition
UP3 − 4
1 − 5Continuity
DOWN1 − 3
4 − 5Continuity
LEFT3 − 4
1 − 6Continuity
RIGHT1 − 3
4 − 6Continuity
If continuity is not as specified, replace the switch.
2. INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and negative (−) lead to terminal 1. Check that the mirror
turns to left side.
(b) Remove the polarity, check that the mirror turns to right
side.

Downloaded from www.Manualslib.com manuals search engine Z04654
Z04382
BE−58
− BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
1996 TOYOTA T100 (RM449U)
(c) Connect the positive (+) lead from the battery to terminal
2 and the negative (−) lead to terminal 1. Check that the
mirror turns upward.
(d) Reverse the polarity, that the mirror turns downward.
If operation is not as specified, replace the mirror assembly.

Downloaded from www.Manualslib.com manuals search engine 1 Radio NO POWER COMING IN
SU P
Ye s
No
R
Ye sNo
No
No Ye s Ye s OK
NG
NG
OK RS
U
RS U P
P
RSU
P S R
US
UP Is tape player operating normally?
Radio faulty.
Radio assembly faulty.
Check if RADIO fuse is OK.
Replace fuse.
Is ACC applied to power amplifier?
Is ACC for the radio assembly being
output from the power amplifier?ACC wire harness faulty.
Power amplifier faulty.
Check if GND (wire harness side) to
power amplifier is OK.
Is ACC applied to radio assembly?
ACC wire harness faulty.
Check if GND (wire harness side) to radio is OK.GND faulty.
Power Amplifier faulty.
GND wire harness faulty.
Radio faulty.
Radio assembly faulty. R
PSU : Radio : Radio + Tape Player
: Radio − Tape Player (Built−in Power Amplifier)
: Radio − Tape Player (Separate Power Amplifier)
P
NG
OK
BE−64
− BODY ELECTRICALAUDIO SYSTEM
1996 TOYOTA T100 (RM449U)
2. AUDIO SYSTEM

Downloaded from www.Manualslib.com manuals search engine 2 Radio POWER COMING IN, BUT RADIO NOT OPERATING
RS
P U
RU
RS
US
UP : Radio
: Radio − Tape Player (Separate Power Amplifier): Radio + Tape Player: Radio − Tape Player (Built−in Power Amplifier)
Ye s
Ye s Ye s
Ye s
Ye s
No No No
No No No Is tape player operating normally?
Is there continuity in speaker wire harness?
Temporarily install another speaker, Functions OK?Speaker wire harness faulty.Radio assembly faulty. If radio side faulty
Radio faulty.
Go to No. 17.
Hissing sound from speaker?Radio faulty.
Radio faulty. Radio assembly faulty.
Radio assembly faulty. Go to No. 17. Is tape player operating normally?Speaker faulty.
Power amplifier faulty, Recheck system after repair.
Radio assembly faulty. Recheck system after repair.
3 Radio NOISE PRESENT, BUT AM−FM NOT OPERATING
: Radio: Radio + Tape Player
: Radio − Tape Player (Separate Power Amplifier)
Hissing sound from speaker?Power amplifier faulty, Recheck system after repair.
Radio assembly faulty.If radio side faulty
RS U
SU
P
SU
P
P
SU
P
P R
S
SU
R
SUP R
R
SUP
Ye s: Radio − Tape Player (Built−in Power Amplifier)
− BODY ELECTRICALAUDIO SYSTEM
BE−65
1996 TOYOTA T100 (RM449U)

Downloaded from www.Manualslib.com manuals search engine R : Radio S : Radio + Tape Player U : Radio − Tape Player (Built−in Power Amplifier)
Radio 4 ANY SPEAKER DOES NOT WORK
P : Radio − Tape Player (Separate Power Amplifier)
SU P
R
RSUPS
S
U
P RUP
Ye s No
Ye s Ye s
Ye s No
NoNo Is tape player operating normally?
Is hiss produced by non−functioning speaker?Radio faulty. Radio assembly faulty.
Is there continuity in speaker wire harness?
Temporarily install another speaker. Functions OK?Speaker wire harness faulty.
Speaker faulty.Radio faulty.
Radio assembly faulty.
Radio assembly faulty.
Recheck system after repair.
S
U
P R
Radio faulty.
Radio assembly faulty.
Radio assembly faulty.
Recheck system after repair.
BE−66
− BODY ELECTRICALAUDIO SYSTEM
1996 TOYOTA T100 (RM449U)

Downloaded from www.Manualslib.com manuals search engine 5 RadioEITHER AM OR FM DOES NOT WORK, RECEPTION
POOR (VOLUME FAINT), FEW PRESET TUNING BANDS
R : Radio S : Radio + Tape Player U : Radio − Tape player (Built−in Power Amplifier)
Are both AM and FM defective?
P : Radio − Tape Player (Separate Power Amplifier)
No
Ye sNo
No
No
No
No Ye s
Ye s
Ye s
Ye s
Ye s Problem with radio wave signals or location?Poor signals, poor location.
Adjust antenna trimmer (See page BE−82).
Speaker faulty. Electronic Tuning
Radio type?Radio or radio
assembly faulty.
Which band is poor?
If radio side faulty.
Is tape player operating normally?
Temporarily install another speaker. Functions OK?Radio faulty.
Go to No.17
Radio assembly faulty.
Hissing sound from speaker?
Radio assembly faulty. Recheck system after repair.Power amplifier faulty. Recheck system after repair. P
FM
AM
Radio faulty.
Radio assembly faulty.RSU
RS
U
− BODY ELECTRICALAUDIO SYSTEM
BE−67
1996 TOYOTA T100 (RM449U)

Downloaded from www.Manualslib.com manuals search engine CANNOT SET STATION SELECT BUTTON, PRESET
MEMORY DISAPPEARS 7 Radio
Can cassette tape be inserted in tape player?
Check if DOME fuse is OK?Radio assembly faulty. R : Radio S : Radio + Tape Player U : Radio − Tape Player (Built−in Power Amplifier)
Replace fuse.
Is B + applied to power amplifier? B + Wire harness faulty.
GND faulty. Check if GND (wire harness side) to
power amplifier?
Check if GND (wire harness side) to radio or
radio assembly?Ye s
No
NG OK P : Radio − Tape Player (Separate Power Amplifier)
P
S
P RU
SU P
SU PR
RSU
R
Ye s
Ye sNo NG
NG
OK
OKGND faulty. Is B + applied to radio or radio assembly?
Power amplifier faulty.
Radio or radio assembly faulty.
Power amplifier faulty. S
P RU No
B + Wire harness faulty.
− BODY ELECTRICALAUDIO SYSTEM
BE−69
1996 TOYOTA T100 (RM449U)

Downloaded from www.Manualslib.com manuals search engine 8 Tape Player CASSETTE TAPE CANNOT BE INSERTED
S : Radio + Tape Player U : Radio − Tape Player (Built−in Power Amplifier)
Is there a foreign object inside tape player?Remove foreign object.
Is radio operating normally?Tape Player faulty.
Radio assembly faulty.
Check if DOME fuse is OK?Replace fuse.
Is B + applied to tape player?
B + wire harness faulty.B + wire harness faulty.
Check if GND (wire harness side) to tape player is OK? GND faulty. Ye s
No
NG
OKS
S
SU
U
UP
P
P
P
P
SU P
S U
P
SP P : Radio − Tape Player (Separate Power Amplifier)
Ye s
Ye s No
No
No
Ye sNG
NG OK
OKTape Player faulty.
Radio assembly faulty.Is B + applied to power amplified?
Check if GND (wire harness side) to power amplifier is OK?
GND faulty. Is B + applied to radio assembly?
Check if GND (wire harness side) to radio
assembly is OK?Power amplifier faulty.
Power amplifier faulty.
BE−70
− BODY ELECTRICALAUDIO SYSTEM
1996 TOYOTA T100 (RM449U)