2003 TOYOTA AVENSIS warning lights

01±30±
INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
AVENSIS REPAIR MANUAL (RM1018E)
PROBLEM SYMPTOMS TABLE
The suspected circuits or parts for each problem symptom are shown in the t\
able below. Use this table to
troubleshoot the problem when a Normal code is displayed in the diagnostic trouble c\
ode chart but the prob-
lem is still occurring. Numbers in the table indicate the order in which\
the circuits or parts should be checked.
HINT:
When the problem is not detected by the diagnostic system even though the pr\
oblem symptom is present,
it may be that the problem is occurring outside the detection range of t\
he diagnostic system.
Symptom Suspected AreaSee page
1. With the ignition switch in ACC or ON position, the SRS warning
light sometimes lights up after approx. 6 seconds have elapsed.
2. SRS warning light is always lit up even when ignition switch is
in the LOCK position
1. With the ignition switch in the ACC or ON position, the SRS
warning light does not light up.
PROBLEM SYMPTOMS TABLE
1. DTC is not displayed. 05±187 05±183
Problem SymptomPage
Indicates the page where the flow chart for each circuit
is located.
Circuit Inspection, Inspection Order
Indicates the circuit which needs to be checked for each problem
symptom. Check in the order indicated by the numbers.
Circuit or Part Name
Indicates the circuit or part which needs to be checked.
Proceed with troubleshooting of each circuit in the table below.
1. SRS warning light circuit
(Always lights up when ignition switch is in
LOCK position.)
1. SRS warning light circuit
(Does not light up when ignition switch is turned
to ACC or ON.)
1. Tc terminal circuit
05±180





3. DTC is displayed without Tc and CG terminal connection. 2. SRS warning light is always lit up at the time of DTC check
procedure.


http://vnx.su

B00540
A75980
Disconnect Wire
from Terminal B
Generator
Voltmeter
Battery Ammeter
19±16
±
STARTING & CHARGING CHARGING SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(b) Check that it fits properly in the ribbed grooves.
HINT:
Check with your hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.
5. VISUALLY CHECK GENERATOR WIRING
(a) Check that the wiring is in good condition.
6. LISTEN FOR ABNORMAL NOISES FROM GENERATOR
(a) Check that there is no abnormal noise from the generator while the engin\
e is running.
7. INSPECT CHARGE WARNING LIGHT CIRCUIT
(a) Turn the ignition switch ON. Check that the charge warning light comes on\
.
(b) Start the engine and check that the light goes off.
HINT:
If the light does not operate as specified, troubleshoot the charge warn\
ing light circuit. 8. INSPECT CHARGING CIRCUIT WITHOUT LOAD
(a) According to the following procedure, connect an amme-
ter and voltmeter as shown in the illustration.
(1) Disconnect the wire from terminal B of the generatorand connect it to the negative (±) lead of the amme-
ter.
(2) Connect the positive (+) lead of the ammeter to ter- minal B of the generator
(3) Connect the positive (+) lead of the voltmeter to ter- minal B of the generator.
(4) Ground the negative (±) lead of the voltmeter.
(b) Check the charging circuit. (1) Keep the engine speed at 2,000 rpm, check thereading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 12.9 to 14.9 V
HINT:

If the voltmeter reading is more than standard voltage, re-
place the voltage regulator.

If the voltmeter reading is less than the standard voltage,
check the voltage regulator and generator as follows:
9. INSPECT CHARGING CIRCUIT WITH LOAD
(a) Keep the engine speed at 2,000 rpm, turn on the high beam headlights and\
turn the heater blower switch to the ºHIº position.
(b) Check the reading on the ammeter. Standard amperage: 30 A or more
HINT:

If the ammeter reading is less than standard amperage, repair the genera\
tor.

If the battery is fully charged, the indication will sometimes be less t\
han standard amperage.
http://vnx.su

B00540
A75980
Disconnect Wire
from Terminal B
Generator
Voltmeter
Battery Ammeter
±
STARTING & CHARGING CHARGING SYSTEM (1AZ±FSE)
19±19
AVENSIS REPAIR MANUAL (RM1018E)
(b) Check that it fits properly in the ribbed grooves.
HINT:
Check with your hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.
5. VISUALLY CHECK GENERATOR WIRING
(a) Check that the wiring is in good condition.
6. LISTEN FOR ABNORMAL NOISES FROM GENERATOR
(a) Check that there is no abnormal noise from the generator while the engin\
e is running.
7. INSPECT CHARGE WARNING LIGHT CIRCUIT
(a) Turn the ignition switch ON. Check that the charge warning light comes on\
.
(b) Start the engine and check that the light goes off.
HINT:
If the light does not operate as specified, troubleshoot the charge warn\
ing light circuit. 8. INSPECT CHARGING CIRCUIT WITHOUT LOAD
(a) According to the following procedure, connect an amme-ter and voltmeter as shown in the illustration.
(1) Disconnect the wire from terminal B of the generatorand connect it to the negative (±) lead of the amme-
ter.
(2) Connect the positive (+) lead of the ammeter to ter- minal B of the generator
(3) Connect the positive (+) lead of the voltmeter to ter-
minal B of the generator.
(4) Ground the negative (±) lead of the voltmeter.
(b) Check the charging circuit. (1) Keep the engine speed at 2,000 rpm, check thereading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 12.9 to 14.9 V
HINT:

If the voltmeter reading is more than standard voltage, re-
place the voltage regulator.

If the voltmeter reading is less than the standard voltage,
check the voltage regulator and generator as follows:
9. INSPECT CHARGING CIRCUIT WITH LOAD
(a) Keep the engine speed at 2,000 rpm, turn on the high beam headlights and\
turn the heater blower switch to the ºHIº position.
(b) Check the reading on the ammeter. Standard amperage: 30 A or more
HINT:

If the ammeter reading is less than standard amperage, repair the genera\
tor.

If the battery is fully charged, the indication will sometimes be less t\
han standard amperage.
http://vnx.su

B00540
A75980
Disconnect Wire
from Terminal B
Generator
Voltmeter
Battery Ammeter
19±6
±
STARTING & CHARGING CHARGING SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
(b) Check that it fits properly in the ribbed grooves.
HINT:
Check with your hand to confirm that the belt has not slipped out
of the groove on the bottom of the pulley.
5. VISUALLY CHECK GENERATOR WIRING
(a) Check that the wiring is in good condition.
6. LISTEN FOR ABNORMAL NOISES FROM GENERATOR
(a) Check that there is no abnormal noise from the generator while the engin\
e is running.
7. INSPECT CHARGE WARNING LIGHT CIRCUIT
(a) Turn the ignition switch ON. Check that the charge warning light comes on\
.
(b) Start the engine and check that the light goes off.
HINT:
If the light does not operate as specified, troubleshoot the charge warn\
ing light circuit. 8. INSPECT CHARGING CIRCUIT WITHOUT LOAD
(a) According to the following procedure, connect an amme-ter and voltmeter as shown in the illustration.
(1) Disconnect the wire from terminal B of the generatorand connect it to the negative (±) lead of the amme-
ter.
(2) Connect the positive (+) lead of the ammeter to ter- minal B of the generator
(3) Connect the positive (+) lead of the voltmeter to ter-
minal B of the generator.
(4) Ground the negative (±) lead of the voltmeter.
(b) Check the charging circuit. (1) Keep the engine speed at 2,000 rpm, check thereading on the ammeter and voltmeter.
Standard amperage: 10 A or less
Standard voltage: 12.9 to 14.9 V
HINT:

If the voltmeter reading is more than standard voltage, re-
place the voltage regulator.

If the voltmeter reading is less than the standard voltage,
check the voltage regulator and generator as follows:
9. INSPECT CHARGING CIRCUIT WITH LOAD
(a) Keep the engine speed at 2,000 rpm, turn on the high beam headlights and\
turn the heater blower switch to the ºHIº position.
(b) Check the reading on the ammeter. Standard amperage: 30 A or more
HINT:

If the ammeter reading is less than standard amperage, repair the genera\
tor.

If the battery is fully charged, the indication will sometimes be less t\
han standard amperage.
http://vnx.su

±
LIGHTING LIGHTING SYSTEM
65±7
AVENSIS REPAIR MANUAL (RM1018E)
(b) Connect the connector to the headlamp leveling ECU
assy, then turn the ignition switch ON and light control
switch into HEAD position. Inspect the wire harness side
connector from the back side as shown in the chart.
Standard:
Tester connectionConditionSpecified condition
2 ± body groundAlways5 V
3 ± body ground3 secs. after vehicle height change for 10 secs.1.0 to 13 V
4 ± body ground3 secs. after vehicle height change for 10 secs.1.0 to 13 V
5 ± body groundAlways0 to 5 V
6 ± body groundAlways0 to 5 V
10 ± body groundHeadlamp Switch is OFF
ON10 to 14 V
Below 1 V
11 ± body groundBeam level warning light OFF
ON10 to 14 V
Below 1 V
12 ± body groundTurn the vehicle wheelPuls generation
13 ± body groundAlways10 to 14 V
14 ± body groundAlways10 to 14 V
15 ± body groundAlways5 V
20 ± body groundAlwaysBelow 1 V
21 ± body groundAlwaysBelow 1 V
22 ± body groundAlwaysBelow 1 V
23 ± body groundAlwaysBelow 1 V
4. HEADLAMP AUTO LEVERING OPERATION CHECK
(a) Check that the initialization (determination of the initial position) for t\
he leveling motor is performed at
the engine±start.
(b) Check that the warning indicator in the combination meter assy illuminates for approximately 3 se- conds at the engine±start and then goes off.
(c) Check that the reflector works when:
Keeping the rear of the vehicle up or down while the engine is running with the vehicle stopped and
the headlamp dimmer switch in the HEAD position.
NOTICE:
Make sure to change the vehicle's height slowly.
5. FAIL±SAFE FUNCTION
(a) Headlamp Leveling Control ECU
HINT:
The Headlamp Leveling Control ECU performs the fail±safe when detecti\
ng following troubles. At this the
warning indicator light on the combination meter lights up.
Trouble AreaConditionHeadlight levering motor
1. Height control sensor
Signal level error

Out of voltageStop leveling operation
2. Headlamp leveling control ECU
Watchdock detection

High voltageStop leveling operation
http://vnx.su

710CM±02
±
INSTRUMENT PANEL/METERCOMBINATION METER
71±1
AVENSIS REPAIR MANUAL (RM1018E)
COMBINATION METER
PROBLEM SYMPTOMS TABLE
Warning Lights:
SymptomSuspect AreaSee page
Check Engine warning light does not come on.
1.Wire Harness or Connector
2.ECM
3.Combination Meter Assy±
±
±
Discharge warning light does not come on.
1.Wire Harness or Connector
2.ECM
3.Combination Meter Assy±
±
±
Brake warning light does not come on.
1.Wire Harness or Connector
2.Skid control ECU
3.Combination Meter Assy±
±
±
ABS warning light does not come on.
1.Wire Harness or Connector
2.Skid control ECU
3.Combination Meter Assy±
±
±
SRS warning light does not come on.
1.Wire Harness or Connector
2.Airbag Sensor Assy
3.Combination Meter Assy±
05±1197 ±
Open Door warning light does not come on.
1.Wire Harness or Connector
2.Front Door Courtesy Light
3.Body ECU
4.Combination Meter Assy±
±
±
±
Fuel Level warning light does not come on.
1.Wire Harness or Connector
2.Fuel Sender Gauge
3.Combination Meter Assy±
±
±
Low Oil Pressure warning light does not come on.
1.Wire Harness or Connector
2.Low Oil Pressure Warning Switch
3.Combination Meter Assy±
±
±
Engine Oil Level warning light does not come on.
1.Wire Harness or Connector
2.Oil Level Sensor
3.Combination Meter Assy±
±
±
Belt warning light does not come on.
1.Wire Harness or Connector
2.Body ECU
3.Front Inner Belt Assy
4.Combination Meter Assy±
±
05±1522
±
VSC warning light does not come on.
1.Wire Harness or Connector
2.VSC Circuit
3.Combination Meter Assy±
05±752 ±
Indicator Lights:
SymptomSuspect AreaSee page
Shift indicator light do not come on.
1. Wire Harness or Connector
2. ECM
3. Neutral Start Switch Circuit
4. Combination Meter Assy±
±
±
±
Turn indicator light does not come on.
1. Wire Harness or Connector
2. Turn Signal and Hazard Warning System
3. Combination Meter Assy±
65±9 ±
Glow indicator light does not come on.
1. Wire Harness or Connector
2. ECM
3. Combination Meter Assy±
±
±
TRC off indicator light does not come on.
1. Wire Harness or Connector
2. VSC Circuit
3. Combination Meter Assy±
05±752 ±
http://vnx.su

73±2
±
THEFT DETERRENT & DOOR LOCK POWER DOOR LOCK CONTROL SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(d) Check the illumination function. (1) Set the room light switch in the DOOR position.
(2) With all doors locked, check that all doors unlock when the driver side door\
lock cylinder is turnedto UNLOCK using the key and that the room right turns on.
(3) Check that the room light turns off in approx. 15 seconds after the doors have not been opened for a while.
3. w/ Double lock:
CHECK DOUBLE LOCKING FUNCTION SYSTEM
(a) Check that the double locking system is set to ON. (1) Open all the windows.
(2) Turn the ignition switch to LOCK and remove the key.
(3) Open and close the driver side door, and make sure that all doors including the back door areclosed securely.
(4) Push the LOCK switch on the wireless transmitter twice within 5 seconds, and check that the hazard warning lights flash once at this time to show that the system is set.
(5) Try to unlock all doors using the inside handle of the vehicle, and check\
that none of the doors
unlock.
NOTICE:

The double locking system cannot be set to ON without using the wireless\
transmitter.

The double locking system operation is not related to the back door.
(b) Check that the double locking system is set to OFF. (1) Push the UNLOCK switch on the wireless transmitter while the double locking system is ON, andcheck that the hazard warning lights flash twice at this time to show th\
at the system is set to OFF.
(2) Check that the doors can be opened both by the inside handle and the outside \
handle.
NOTICE:
If the battery of the wireless transmitter is dead, only the driver side\
door can be opened using the
key. However, the theft deterrent system still remains on. Therefore, be aware that\
the theft alarm
is set off when the door is opened without the use of the wireless trans\
mitter.
http://vnx.su

730G8±01
±
THEFT DETERRENT & DOOR LOCK THEFT DETERRENT SYSTEM
73±31
AVENSIS REPAIR MANUAL (RM1018E)
THEFT DETERRENT SYSTEM
ON±VEHICLE INSPECTION
1. OUTLINE OF THEFT DETERRENT SYSTEM
(a) When the theft deterrent system detects that the vehicle is being tampered with, the sy\
stem sets off
the alarm, causing the horns to sound and the lights to light up or blink in order to alert\
people around
the vehicle to the theft.
(b) The theft deterrent system has an active arming mode; a disarmed state, an \
arming preparation state,
an armed state and an alarm sounding state.
(1) Disarmed state:

The alarm function is not operating.

The theft deterrent system is not operating.
(2) Arming preparation state:

The time until the system goes into the armed state.

The theft deterrent system is not operating.
(3) Armed state:

The theft deterrent system is operating.
HINT:
If the vehicle remains in a condition that sets off the alarm (any door remains open, engine hood remains
open, ignition switch remains directly connected) after the alarm ends,\
the alarm will be set off repeatedly
a maximum of 10 times for every one of the above specified conditions. Alarm time: Approx. 27.5 sec. x 10
(4) Alarm sounding state:When the theft deterrent system detects that the vehicle is being tampered w\
ith while in the
armed state, the system causes the horns to sound and the lights to light up or blink in order t\
o
alert people around the vehicle to the theft.
Refer to table below for alarm method and time:
Hazard Warning LampBlinking (Cycle of flasher relay)
Alarm MethodRoom LampIlluminatingAlarm MethodVehicle HornSounding (Cycle of 0.4 sec.)
Self±power SirenSounding (Cycle of 0.4 sec.)
Alarm TimeApprox. 27.5 sec. (Maximum 10 times)
HINT:
If any of the doors are unlocked with no key in the ignition key cylinde\
r during the armed state, a forced door
lock signal will be output (See step 3).
http://vnx.su