CIRCUIT DIAGRAMS
H1J09X13BA
B-140
TURN-SIGNAL LAMP AND HAZARD WARNING LAMP
(CONTINUED)
INDEX - In order of connector No.C-1
INDEX
In order of connector No.
Connector
No.Parts nameCircuit diagram pageWiring diagram
page
AA-01Side turn signal lamp (RH)B-135,139B-6,8
A-02Side turn signal lamp (LH)B-134,138B-6,8
A-03Wheel speed sensor (Front:LH)B-203,211,217,225,233,243B-6,8
A-04XSpare connector (for front fog lamp
relay)B-73,258B-6,8
A-05XHorn relayB-73,146B-6,8
A-06XCondenser fan relay (LO)B-73,177,183B-6,8
A-07XCondenser fan relay (HI)B-73,177,183B-6,8
A-08XNo connectionB-73B-6,8
A-09XRadiator fan relayB-73,102,176,182B-6,8
A-10XFront-ECUB-73,75,103,104,106,107,110,111,
114,115,124,127,130,131,132,133,
136,140,187,191, 258B-6,8
A-11XFront-ECUB-73,104,106,107,111,115,124,127,
131,133, 136,140,186,187,190,191B-6,8
A-12Front wiring harness (LH) and control
wiring harness combination
A-13Front wiring harness (LH) and control
wiring harness combination
A-16Headlamp (HI:LH)B-103,106B-6,8
A-21Fan controllerB-102,176,182B-7,8
A-23Horn (HI)B-146B-7,8
A-25Horn (LO)B-146B-7,9
A-28Headlamp (HI:RH)B-103,106B-7,9
A-31Spare connector (for front fog lamp)B-258B-7,9
A-34No connection-B-9
A-36Dual pressure switchB-178,184B-7,9
A-37Wheel speed sensor (Front:RH)B-203,211,217,225,233,243B-7,9
A-39Front combination lamp (LH)B-103,106,110,114,130,132,134,138B-7,9
A-40Front combination lamp (RH)B-103,106,111,114,130,132,135,139B-7,9
A-43Front wiring harness (LH) and control
wiring harness combination
A-44Intercooler water spray motorB-256B-7,9
INDEX - In order of parts nameC-19
Wiring diagram
page Circuit diagram page Connector
No. Parts name
PPurge control solenoid valveB-23B-91,99B-11,15
RRadiator fan relayA-09XB-73,102,176,182B-6,8
Rear combination lamp (LH)F-16B-110,114,126,134,138,143,144,145B-38,39
Rear combination lamp (RH)F-09B-111,115,129,134,138,142,144,145B-38,39
Rear fog lamp relayC-219B-54,55,126,129B-23,29
Rear room lampD-05B-118,122B-30,32
Remote controlled mirror (LH)E-02B-192,193B-34,36
Remote controlled mirror (RH)E-13B-192,193B-34,36
Remote controlled mirror switchC-138B-192,193B-21,27
ResistorB-138B-89,97B-13,17
ResistorC-16B-174,180B-18,24
Roof antennaC-141B-196B-21,27
Roof wiring harness (RH) and J/B
combinationC-218B-54,55,118,119,122,123B-23,29
Room lampD-03B-118,122B-30,32
SSeat belt pretensioner (LH)D-28B-249,251B-31,33
Seat belt pretensioner (RH)D-26B-249,251B-31,33
Secondary air control solenoid valveB-142B-91,99B-13,17
Side turn signal lamp (LH)A-02B-134,138B-6,8
Side turn signal lamp (RH)A-01B-135,139B-6,8
Spare connector (for front fog lamp
relay)A-04XB-73,258B-6,8
Spare connector (for front fog lamp
switch)C-101B-258B-20,26
Spare connector (for front fog lamp)A-31B-258B-7,9
Spare connector (for radio)C-104B-196,197B-20,26
Spare connector
Spare connector
Spare connector
Spare connector
SRS-ECUC-21B-248,249,250,251B-18,24
GENERAL -How to Use Troubleshooting/Inspection Service Points00-8
WHEN USING THE WARNING LAMP
1. Use the special tool to earth No.1 terminal (diagnosis
control terminal) of the diagnosis connector.
2. Turn the ignition switch to “ON” position.
3. Read out a diagnosis code by observing how the warning
lamp flashes.
Applicable systems
System nameWarning lamp name
ACD, AYCACD mode indicator lamp
ABSABS warning lamp
Indication of diagnosis code by warning lamp
When the diagnosis code No.24 is outputWhen no diagnosis code is output*
On
Off
1.5 secs.0.5 sec.
0.5 sec.
Pause
time 3
secs.Tens
signalPlace
division
2 secs.Units
signal
On
Off
0.25 sec.
METHOD OF ERASING DIAGNOSIS CODES
WHEN USING THE MUT-II
Connect the MUT-IIto the diagnosis connector and erase the diagnosis code.
Caution
Turn the ignition switch to “LOCK”(OFF) position before connecting or disconnecting the MUT-II.
WHEN NOT USING THE MUT-II
1. Turn the ignition switch to “LOCK”(OFF) position.
2. After disconnecting the battery cable from the battery ( - ) terminal for 10 seconds or more, reconnect
the cable.
3. After the engine has warmed up, run it at idle for about 15 minutes.
MB991529
GENERAL -How to Use Troubleshooting/Inspection Service Points00-9
INPUT SIGNAL CHECK
WHEN USING THE MUT-II
1. Connect the MUT-IIto the diagnosis connector and erase
the diagnosis code.
Caution
Turn the ignition switch to “LOCK”(OFF) position
before connecting or disconnecting the MUT-II.
2. If the MUT-IIbuzzer sounds once when each switch is
operated (ON/OFF), the input signal for that switch circuit
system is normal.
WHEN USING A VOLTMETER
1. Use the special tool to connect the ETACS terminal
(terminal 9) and the earth terminals (terminals 4 and 5)
of the diagnosis connector to the voltage meter.
2. If the needle of the voltage meter flickers once when
each switch is operated (ON/OFF), the input signal for
that switch circuit system is normal.MUT-˜
MB991529
ENGINE -On-vehicle ServiceENGINE -On-vehicle Service11A-10
Standard value: 5_BTDC±3_
5. Run the engine at idle for 2 minutes.
6. Check the idle speed. Select item No. 22 and take a
reading of the idle speed.
Curb idle speed: 850±100 r/min
NOTE
The idle speed is controlled automatically by the idle speed
control (ISC) system.
7. If the idle speed is outside the standard value, check
the MPI components by referring to GROUP 13A -
Troubleshooting.
8. Remove the timing light.
9. Turn the ignition switch to the “LOCK” (OFF) position
and then remove the MUT-II.
IDLE MIXTURE CHECK
1. Before inspection, set the vehicle to the pre-inspection
condition.
2. Turn the ignition switch to the “LOCK” (OFF) position,
and then connect the MUT-IIto the diagnosis connector.
3. Set the timing light.
4. Check that the basic ignition timing is within the standard
value.
Standard value: 5_BTDC±3_
5. Run the engine at 2,500 r/min for 2 minutes.
6. Set the CO, HC tester.
7. Check the CO contents and the HC contents at idle.
Standard value
CO contents: 0.1% or less
HC contents: 100 ppm or less
8. If there is a deviation from the standard value, check the
following items:
DDiagnosis output
DClosed-loop control (When the closed-loop control
is normal, the output signal of the oxygen sensor
changes between 0 - 400 mV and 600 - 1,000 mV
at idle.)
DFuel pressure
DInjector
DIgnition coil, spark plug cable, spark plug
DEvaporative emission control system
DCompression pressure
NOTE
Replace the three way catalyst when the CO and HC
contents are not within the standard value, even though
the result of the inspection is normal on all items.
9. Remove the timing light.
MUT-II
MPI -General Information13A-3
GENERAL INFORMATION
The Multipoint Fuel Injection System consists
of sensors which detect the engine conditions,
the engine-ECU which controls the system
based on signals from these sensors, and
actuators which operate under the control of
the engine-ECU. The engine-ECU carries outactivities such as fuel injection control, idle
speed control and ignition timing control. In
addition, the engine-ECU is equipped with
several diagnosis modes which simplify
troubleshooting when a problem develops.
FUEL INJECTION CONTROL
The injector drive times and injector timing are
controlled so that the optimum air/fuel mixture
is supplied to the engine to correspond to the
continually-changing engine operation condi-
tions.
A single injector is mounted at the intake port
of each cylinder. Fuel is sent under pressure
from the fuel tank by the fuel pump, with the
pressure being regulated by the fuel pressure
regulator. The fuel thus regulated is distributed
to each of the injectors.
Fuel injection is normally carried out once for
each cylinder for every two rotations of the
crankshaft. The firing order is 1-3-4-2. This iscalled sequential fuel injection. The
engine-ECU provides a richer air/fuel mixture
by carrying out “open-loop” control when the
engine is cold or operating under high load
conditions in order to maintain engine
performance. In addition, when the engine is
warm or operating under normal conditions,
the engine-ECU controls the air/fuel mixture
by using the oxygen sensor signal to carry out
“closed-loop” control in order to obtain the
theoretical air/fuel mixture ratio that provides
the maximum cleaning performance from the
three way catalyst.
IDLE AIR CONTROL
The idle speed is kept at the optimum speed
by controlling the amount of air that bypasses
the throttle valve in accordance with changes
in idling conditions and engine load during
idling. The engine-ECU drives the idle speed
control motor to keep the engine running at
the pre-set idle target speed in accordance
with the engine coolant temperature and airconditioner load. In addition, when the air
conditioner switch is turned off and on while
the engine is idling, the idle speed control motor
operates to adjust the throttle valve bypass
air amount in accordance with the engine load
conditions in order to avoid fluctuations in the
engine speed.
IGNITION TIMING CONTROL
The power transistor located in the ignition
primary circuit turns ON and OFF to control
the primary current flow to the ignition coil. This
controls the ignition timing in order to provide
the optimum ignition timing with respect to theengine operating conditions. The ignition timing
is determined by the engine-ECU from the
engine speed, intake air volume, engine coolant
temperature and barometric pressure.
SELF-DIAGNOSIS FUNCTION
DWhen an abnormality is detected in one
of the sensors or actuators related to
emission control, the engine warning lamp
(check engine lamp) illuminates as a
warning to the driver.
DWhen an abnormality is detected in one
of the sensors or actuators, a diagnosis
code corresponding to the abnormality is
output.DThe RAM data inside the engine-ECU that
is related to the sensors and actuators can
be read by means of the MUT-II. In addition,
the actuators can be force-driven under
certain circumstances.
MPI -TroubleshootingMPI -Troubleshooting13A-11
CONFIRMING FREEZE FRAME DATA
When the engine-ECU detects a malfunction and stores a diagnosis code, it also stores a current status
of the engine. This function is called “Freeze frame” data. By analyzing this “Freeze frame” data with
MUT-II, an effective troubleshooting can be performed.
NOTE
If mulfunctions have been detected in multiple systems, engine-ECU stores one malfunction only, which
has been detected first.
Item No.Data itemUnit/StateItem No.Data itemUnit/State
21Engine coolant temperature
sensor_C81Learn value%
22Crank angle sensorr/min82Feedback%
24Vehicle speedkm/h87Engine load%
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled
by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning itemControl contents during malfunction
Air flow sensor1. Uses the throttle position sensor signal and engine speed signal (crank angle sensor
signal) to take reading of the basic injector drive time and basic ignition timing from
the pre-set mapping.
2. Fixes the idle speed control servo in the appointed position so idle control is not
performed.
Intake air temperature
sensorControls as if the intake air temperature is 25_C.
Throttle position
sensorNo increase in fuel injection amount during acceleration due to the throttle position sensor
signal.
Engine coolant
temperature sensor1. Controls as if the engine coolant temperature is 80_C.
(Even after sensor signal is correctly recovered, continues until the ignition switch
is set to the “LOCK” (OFF) position.)
2. Rotates radiator fan and condenser fan at high speed.
Camshaft position
sensor1. Inject all fuel cylinders simultaneously. (However, when the No.1 cylinder top dead
centre is not detected at all after the ignition switch is turned to “ON” position.)
2. Shuts off fuel supply after 4 seconds have passed since a failure was detected.
(However, when the No.1 cylinder top dead centre is not detected at all after the
ignition switch is turned to “ON” position.)
Barometric pressure
sensorControls as if the barometric pressure is 101 kPa.
Detonation sensorSwitches the ignition timing from ignition timing for super petrol to ignition timing for standard
petrol.
Alternator FR terminalDoes not control the output of the alternator according to an electrical load. (works as a
normal alternator)