1994 TOYOTA CAMRY fuel pump relay

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Page 34 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 34
ELECTRICAL WIRING ROUTING
Position of Parts in Body
[Sedan]
A 19 ABS Speed Sensor Rear LH L 3 Luggage Compartment Light
A 20 ABS Speed Sensor Rear RH L 4 Luggage Compartment Light SW
A 21 Auto Ante

Page 35 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 35
Position of Parts in Body
[Coupe]
A 19 ABS Speed Sensor Rear LH M 2 Moon Roof Control Relay
A 20 ABS Speed Sensor Rear RH M 3 Moon Roof Control SW and Personal Light
A 21 Auto Antenna Motor and Rel

Page 36 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 36
ELECTRICAL WIRING DIAGRAM
Position of Parts in Body
[Wagon]
A 19 ABS Speed Sensor Rear LH F 13 Front Tweeter (Speaker) LH P 11 Power Window Control SW Rear
A 20 ABS Speed Sensor Rear RH F 14 Front

Page 81 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 81
A
M 45
BL EBBX15 D 14
BATT
D 21
ELSA 14
NSWA 13
STA
D 23+B
D 22+B1
A 9#20
A 6#50
A 7#40
A 8#30
A 5#60
A 10#10 2B 22C32D4
IP3 12 I18
I23
L± B
G±R
Y
R
L
GR
G
W B± O B± OL± B B±W
B±WB± O
L±B

Page 89 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 89
2. CONTROL SYSTEM
*MFI (MULTIPORT FUEL INJECTION (EFI)) SYSTEM
THE MFI (EFI) SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT FROM EACH SENSOR (INPUT
SIGNALS FROM (1) TO (13) ETC.) TO

89
2. CONTROL SYSTEM
*MFI (MULTIPORT FUEL INJECTION (EFI)) SYSTEM
THE MFI (EFI) SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT FROM EACH SENSOR (INPUT
SIGNALS FROM (1) TO (13) ETC.) TO THE ENGINE CONTROL MODULE (ECU). THE BEST FUEL INJECTION VOLUME IS DECIDED
BASED ON THIS DATA AND THE PROGRAM MEMORIZED BY THE ENGINE CONTROL MODULE (ECU), AND THE CONTROL SIGNAL
IS OUTPUT TO TERMINALS #10, #20, #30 AND #40 (CALIFORNIA), TERMINALS #10 AND #20 (EX. CALIFORNIA) OF THE ENGINE
CONTROL MODULE (ECU) TO OPERATE THE INJECTOR. (INJECT THE FUEL). THE MFI (EFI) SYSTEM PRODUCES CONTROL OF
FUEL INJECTION OPERATION BY THE ENGINE CONTROL MODULE (ECU) IN RESPONSE TO THE DRIVING CONDITIONS.
*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM
THE ESA SYSTEM MONITORS THE ENGINE CONDITION THROUGH THE SIGNALS INPUT TO THE ENGINE CONTROL MODULE (ECU)
FROM EACH SENSOR (INPUT SIGNALS FROM (1), (2), (4) TO (12) ETC.) THE BEST IGNITION TIMING IS DETECTED ACCORDING TO
THIS DATA AND THE MEMORIZED DATA IN THE ENGINE CONTROL MODULE (ECU) AND THE CONTROL SIGNAL IS OUTPUT TO
TERMINAL IGT. THIS SIGNAL CONTROLS THE IGNITER TO PROVIDE THE BEST IGNITION TIMING FOR THE DRIVING CONDITIONS.
*IAC (IDLE AIR CONTROL (ISC)) SYSTEM
THE IAC (ISC) SYSTEM (ROTARY SOLENOID TYPE) INCREASES THE RPM AND PROVIDES IDLING STABILITY FOR FAST IDLE±UP
WHEN THE ENGINE IS COLD AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD, ETC. THE ENGINE
CONTROL MODULE (ECU) EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1), (4) TO (8), (13) ETC.), OUTPUTS
CURRENT TO TERMINALS ISCO AND ISCC, AND CONTROLS THE IDLE AIR CONTROL VALVE (ISC VALVE).
*FUEL PUMP CONTROL SYSTEM
THE ENGINE CONTROL MODULE (ECU) OPERATION OUTPUTS TO TERMINAL FC AND CONTROLS THE CIRCUIT OPENING RELAY
AND THUS CONTROLS THE FUEL PUMP DRIVE SPEED IN RESPONSE TO CONDITIONS.
*A/C IDLE±UP SYSTEM
IN ORDER TO PREVENT THE ENGINE IDLING SPEED FROM DROPPING WHEN THE A/C IS OPERATING, THE A/C IDLE±UP SYSTEM
CONTROLS THE VSV (FOR A/C IDLE±UP) TO INCREASE THE ENGINE IDLING SPEED AND KEEP IT STABLE.
*EGR CONTROL SYSTEM
THE EGR CUT CONTROL SYSTEM CONTROLS THE VSV (FOR EGR) BY EVALUATING THE SIGNALS FROM EACH SENSOR INPUT TO
THE ENGINE CONTROL MODULE (ECU) (INPUT SIGNALS (1), (5), (6), (9) ETC.) AND BY SENDING OUTPUT TO TERMINAL THG OF
THE ENGINE CONTROL MODULE (ECU).
*A/C CUT CONTROL SYSTEM
WHEN THE VEHICLE SUDDENLY ACCELERATES FROM LOW ENGINE SPEED, THIS SYSTEM CUTS OFF AIR CONDITIONING
OPERATION FOR A FIXED PERIOD OF TIME IN RESPONSE TO THE VEHICLE SPEED AND THROTTLE VALVE OPENING ANGLE IN
ORDER TO MAINTAIN ACCELERATION PERFORMANCE.
THE ENGINE CONTROL MODULE (ECU) RECEIVES INPUT SIGNALS ((5), (6) ETC.), AND OUTPUTS SIGNALS TO TERMINAL ACT.
3. DIAGNOSIS SYSTEM
WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTIONING IN THE ENGINE CONTROL MODULE (ECU) SIGNAL SYSTEM,
THE MALFUNCTION SYSTEM IS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING
THE DISPLAY (CODE) OF THE MALFUNCTION INDICATOR LAMP (CHECK ENGINE WARNING LIGHT).
4. FAIL±SAFE SYSTEM
WHEN A MALFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY
CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM
BY USING DATA (STANDARD VALUES) RECORDED IN THE ENGINE CONTROL MODULE (ECU) MEMORY OR ELSE STOPS THE
ENGINE.

Page 93 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 93
* 1 : CALIFORNIA
*
2 : EX. CALIFORNIA
* 3 : EX. CALIFORNIA M/T
*
5 : EX.*
4 *
4 : FOR CANADA IN TMM MADE
CB
17 8 9 13 4 15
146 212 1
23 IP119
IP115
IP313
IP11
IP3196 61
666
M
5 4
E17I18 I18 I18
I18

Page 101 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 101
* 2 : TMM MADE *
1:TMCMADE
AB
8913 415
146 212 1
23 IP313
IP11
IP3196 62C A6
666
M
5 4 I18
I18I18 I18 I18
IP3 15IP1 4
BX1 4IJ1 16IP3 18
BX1 5
BL IG 2 1
ECB 15 B7B8A2
C
B 1B6C43
GR
G±W
R±W B±O
B

Page 257 of 307

TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual 257
DOOR KEY LOCK
AND UNLOCK SW RH
DOOR LOCK CONTROL
SW RH
DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT RH
DOOR KEY LOCK AND
UNLOCK SW LH DOOR KEY CYLINDER
LIGHT AND SW
DOOR LOCK MOTOR
AND DOOR

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