2005 TOYOTA AVENSIS cruise

± INTRODUCTIONHOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±25
AVENSIS REPAIR MANUAL (RM1018E)
SYMPTOM CONFIRMATION AND DIAGNOSTIC TROUBLE CODE
HINT:

The diagnostic system in AVENSIS has various functions. The first function is the Diagnostic Trouble
Code (DTC) Check, in which a malfunction in the signal circuits to the ECU is stored in code form in
the ECU memory. Another function is the Input Signal Check, which checks if the signals from various
switches are sent to the ECU correctly. By using these check functions, it is possible to quickly narrow
down potential problem areas and troubleshooting can be performed effectively. The diagnostic func-
tions are incorporated in the following systems in the AVENSIS.
SystemDiagnostic Trouble
Code CheckInput Signal Check
(Sensor Check)Diagnostic Test
Mode (Active Test)
SFI System (1AZ±FE/1AZ±FSE, 1ZZ±FE/3ZZ±FE)

(with Check Mode)


ECD System (1CD±FTV)

(with Check Mode)


ABS with EBD System



ABS with EBD & BA & TRC & VSC System



Electronically Controlled Automatic Transmission [ECT]

(with Check Mode)

Air Conditioning System


Supplemental Restraint System

Audio System

Power Door Lock Control System


Wireless Door Lock Control System

Key Reminder Warning System

Engine Immobiliser System


Theft Deterrent System


Multiplex Communication System

Cruise Control System



In the DTC check, it is very important to determine whether the problem indicated by the DTC is still
occurring or has occurred in the past but returned to normal at present. In addition during the problem
symptom check, it a check must be made on whether the malfunction indicated by the DTC is directly
related to the problem symptom or not. For this reason, the DTC should be checked before and after
symptom confirmation to determine the current conditions. If this is not done, it may, depending on the
case, result in unnecessary troubleshooting for systems that are operating normally. This would make
more difficult to detect the problem area or to try to repair irrelevant areas. Therefore, always follow
the procedures in the correct order and perform the DTC check.

A flow chart showing how to proceed with troubleshooting using the diagnostic trouble code (DTC)
check is shown the this page. This flow chart shows how to utilize the DTC check effectively. Then,
by carefully checking the results, this chart indicates how to proceed either to the DTC troubleshooting
or to the troubleshooting of the problem symptoms table.
1 DTC check
2 Make a note of DTCs displayed and then clear the memory
3 Symptom confirmation

010B6±13
±
INTRODUCTION HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS01±21
AVENSIS REPAIR MANUAL (RM1018E)
HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS
GENERAL INFORMATION
There are many ECU controlled systems used in the AVENSIS. In general, ECU controlled system are con-
sidered to be very intricate and require a high level of technical knowledge an\
d expert skill to troubleshoot.
The fact is, however, that if you proceed by inspecting the circuits one by one, troubleshoo\
ting of these sys-
tems is not complex. If you have adequate understanding of the system and ba\
sic knowledge of electricity,
the problem can be accurately diagnosed and fixed. This manual is design\
ed based on the above principle
to help service technicians perform accurate and effective troubleshooting, and is compiled for the following
major ECU controlled systems:
The troubleshooting procedures are described on the following pages.
SystemPage
1. SFI System [1ZZ±FE, 3ZZ±FE]05±1
2. SFI System [1AZ±FE]05±143
3. SFI System [1AZ±FSE]05±290
4. ECD System [1CD±FTV]05±523
5. ABS with EBD System05±696
6. ABS with EBD & BA & TRC & VSC System05±752
7. Electronic Controlled Automatic Transmission [ECT] [U241 (1AZ±FE)]05±856
8. Electronic Controlled Automatic Transmission [ECT] [U241 (1AZ±FSE)]05±915
9. Electronic Controlled Automatic Transmission [ECT] [U341]05±980
10.Electronic Motor Power Steering System05±1042
11. Air Conditioning System05±1088
12.Combustion Type Power Heater System05±1161
13.Supplemental Restraint System05±1181
14.Audio System05±1393
15.Navigation System05±1435
16.Combination Meter05±1497
17.Power Door Lock Control System05±1534
18.Wireless Door Lock Control System05±1568
19.Key Reminder Warning System05±1586
20.Engine Immobiliser System05±1599
21.Theft Deterrent System05±1627
22.Multiplex Communication System05±1654
23.Cruise Control System05±1697
FOR USING HAND±HELD TESTER

Before using the tester, the tester's operator manual should be read thoroughly.

If the tester cannot communicate with the ECU controlled systems when you \
have connected the cable
of tester to the DLC3, turned the ignition switch ON and operated the test\
er, there is a problem on the
vehicle side or tester side.
(1) If the communication is normal when the tester is connected to another veh\
icle, inspect the diag-
nosis data link line (Bus
line) or ECU power circuit of the vehicle.
(2) If the communication is still impossible when the tester is connected to a\
nother vehicle, the prob- lem is probably in the tester itself, so perform the Self Test procedures outlined in the Tester Oper-
ator 's Manual.

05±314
±
DIAGNOSTICS SFI SYSTEM (1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E) 


\f  
*
1
CHK ENG
 
 \b
P0555
(05±459)Brake Booster Pressure Sensor
Circuit

Open or short in brake booster pressure sensor circuit

Brake booster pressure sensor

Vacuum hose

ECM

P0556
(05±462)Brake Booster Pressure Sensor
Circuit Range/Performance

Vacuum hose (between the brake booster and intake manifold,
the brake booster and brake booster pressure sensor, and the
intake manifold and manifold absolute pressure sensor)

Open or short in brake booster pressure sensor circuit

Brake booster pressure sensor

Manifold absolute pressure sensor

Brake booster

Open or short in stop light switch circuit

Stop light switch

ECM

P0557
(05±459)Brake Booster Pressure Sensor
Circuit Low Input
Same as DTC No. P0555
P0558
(05±459)Brake Booster Pressure Sensor
Circuit High Input
Same as DTC No. P0555
P0560
(05±467)System Voltage
Open in back±up power source circuit

ECM
P0571
(05±1711)Brake Switch ºAº Circuit
Cruise control system

P0604
(05±470)Internal Control Module Random
Access Memory (RAM) Error
P0606
(05±470)ECM/PCM Processor
ECM
P0607
(05±470)Control Module Performance
P0617
(05±471)Starter Relay Circuit High

Short in park/neutral position switch (A/T)

Park/neutral position switch (A/T)

Ignition switch

ECM

P0657
(05±470)Actuator Supply Voltage Circuit /
Open
ECM
P0705 *4
(05±474)
Transmission Range Sensor Cir-
cuit Malfunction (PRNDL Input)
Short in park/neutral position switch circuit

Park/neutral position switch

ECM

P0710 *4
(05±941)
Transmission Fluid Temperature
Sensor ºAº circuit
Electronic controlled automatic transmission (ECT)
P0711 *3,4
(05±943)
Transmission Fluid Temperature
Sensor ºAº Performance
Electronic controlled automatic transmission (ECT)
P0712 *4
(05±941)
Transmission Fluid Temperature
Sensor ºAº Circuit Low Input
Electronic controlled automatic transmission (ECT)
P0713 *4
(05±941)
Transmission Fluid Temperature
Sensor ºAº Circuit High Input
Electronic controlled automatic transmission (ECT)
P0717 *4
(05±945)
Input/Turbine Speed Sensor ºAº
Circuit No Signal
Electronic controlled automatic transmission (ECT)
P0724 *4
(05±947)Brake Switch ºBº Circuit High

Short in stop light switch signal circuit

Stop light switch

ECM

P0741 *3,4
(05±948)
Torque Converter Clutch Circuit
Performance or Stuck Off
Electronic controlled automatic transmission (ECT)
P0743 *4
(05±951)
Torque Converter Clutch Circuit
Electrical
Electronic controlled automatic transmission (ECT)

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FE))05±869
AVENSIS REPAIR MANUAL (RM1018E)
5.ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the hand±held tester allows the relay, VSV, actuator and so on to oper-
ate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one of the
method to shorten the labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
(a)Warm up the engine.
(b)Turn the ignition switch OFF.
(c)Connect the hand±held tester to the DLC3.
(d)Turn the ignition switch ON.
(e)According to the display on tester, perform the ºACTIVE TESTº.
ItemTest DetailsDiagnostic Note
LINE PRESS UP
[Test Details]
Operate the shift solenoid SLT and raise the line pressure.
[Vehicle Condition]

Vehicle Stopped.

IDL: ON
[Others]
ON: Line pressure up.
OFF: No action (normal operation)
±
LOCK UP
[Test Details]
Control the shift solenoid DSL to set the ATM to the lock±up condition.
[Vehicle Condition]
Vehicle Speed: 60 km/h (37 mph) or more
Possible to check the DSL opera-
tion.
SHIFT
[Test Details]
Operate the shift solenoid valve and set the each shift range by your-
self.
[Vehicle Condition]
Less than 50 km/h (31 mph)
[Others]

Press
button: Shift up

Press  button: Shift down
Possible to check the operation of
the shift solenoid values.
6.PROBLEM SYMPTOM CONFIRMATION
(a)Taking into consideration the results of the customer problem analysis, try to\
reproduce the symptoms of the trouble. If the problem is that the transaxle does not shift up, sh\
ift down, or the shift point is too
high or too low, conduct the following road test referring to the automatic shift sched\
ule and simulate
the problem symptoms.
7.ROAD TEST
NOTICE:
Conduct the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).
(a)D range test Shift into the D range and fully depress the accelerator pedal and check\
the following points:
(1)Check up±shift operation.Check to see that 1
2, 2
3 and 3
O/D up±shift take place, and that the shift points conform
to the automatic shift schedule (See page 03±45).
HINT:

O/D Gear Up±shift Prohibition Control (1. Water temp. is 60
C (140
F) or less. 2. If there is a 10 km/h
(6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Water temp. is 60
C (140
F)
or lower)

±
DIAGNOSTICS ELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT](U241E(1AZ±FSE))05±925
AVENSIS REPAIR MANUAL (RM1018E)
7.ROAD TEST
NOTICE:
Conduct the test at normal operating ATF temperature 50 to 80
C (122 to 176
F).
(a)D range test Shift into the D range and fully depress the accelerator pedal and check\
the following points:
(1)Check up±shift operation.Check to see that 1
2, 2
3 and 3
O/D up±shift take place, and that the shift points conform
to the automatic shift schedule (See page 03±45).
HINT:

O/D Gear Up±shift Prohibition Control (1. Water temp. is 60
C (140
F) or less. 2. If there is a 10 km/h
(6 mph) difference between the set cruise control speed and vehicle speed.)

O/D Gear Lock±up Prohibition Control (1. Brake pedal is depressed. 2. Water temp. is 60
C (140
F)
or lower)
(2)Check for shift shock and slip. Check for shock and slip at the 1
2, 2
3 and 3
O/D up±shift.
(3)Check for abnormal noise and vibration.
Run in D range lock±up or O/D gear and check for abnormal noise and v\
ibration.
HINT:
The check for the cause of abnormal noise and vibration must be done very t\
horoughly as it could also be
sure to loss of balance in the differential, torque converter, etc. (4)Check kick±down operation.While running in the D range, 2nd, 3rd and O/D gears, check to see that the p\
ossible kick±down
vehicle speed limits for 2
1, 3
2 and O/D
3 kick±downs conform to those indicated in the
automatic shift schedule (See page 03±45).
(5) Check for abnormal shock and slip at kick±down.
(6) Check the lock±up mechanism.

Drive in D range O/D gear, at a steady speed (lock±up ON) of about 60 km/h (37 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock±up.
(b) S range test Shift to the S range, depress the accelerator pedal and check the follow\
ing points:
Shift operations.

Shifting the shift lever to º+º or º±º changes the shift \
range on the combination meter.
HINT:
Manual shift prohibition control is performed when:

The ATF temperature is low.

Down±shifting causes engine overrun.

Down±shifting is required continuously. (Down±shifting to 1st gear may not be performed.)
(c) R range test Shift into the R range and fully depress the accelerator pedal and check\
for slipping.
CAUTION:
Before conducting this test, ensure that the test area is free from peop\
le and obstruction.
(d) P range test Stop the vehicle on a grade (more than 5
) and after shifting into the P range, release the parking
brake. Then, check to see that the parking lock pawl holds the vehicle in plac\
e.

I34627
C11±21 (IG1+)
*3:
C11±10 (AUTO LEVELING)
C11±22 (IG2+)
C11±8 (AIR BAG)
C10±8 (Rr FOG)
C10±7 (Fr FOG) BUZZER
WATER LVL
CHECK E/G
VSC
SLIP
AUTO LVL
ABS
EMPS
BRAKE
A/B ACTIVE
CIRCUIT
E/G OIL LVL
FUEL
A/T OIL TEMP
CHG
ECT SNOW
D±SEAT BELT
Rr FOG
Fr FOG
TRC OFF
OIL/P
*1: GLOW
CRUISE AIR BAG
ABS ACTIVE
CIRCUIT
EMPS ACTIVE
CIRCUIT
BRAKE ACTIVE
CIRCUIT
C11±11 (OIL PRESS SW)
C11±4 (EBD) *3: C11±6 (EMPS)C10±9 (ABS) *1, 2: C11±15 (SLIP)*1, 2: C11±16 (VSC)
C11±2 (BRAKE LVL SW)
CPU
*1: 1CD±FTV, *2: 1AZ±FSE, 2AZ±FSE, *3: 1ZZ±FE, 3ZZ±FE
C11±9 (CHECK ENGINE)
*1, 2:
C11±17 (TRC OFF) 05±1504
± DIAGNOSTICSCOMBINATION METER
AVENSIS REPAIR MANUAL (RM1018E)

I35707
1AZ±FSE
D5
DLC3
TC
CG13
4W±L
W±B
W±B W±LW±L
W±BW±L
TC 20
E12 17 3
DB DC
CB CA36 DBB
B
A J21 J20J8
J8
J16
J/C
IOIP Center J/B Driver Side J/BECM
*2: RHD *1: LHD (*1)(*1)
(*1)(*2)
(*2)
(*2)
(*1) (*2)
(*2) J/B
A
W±B
± DIAGNOSTICSCRUISE CONTROL SYSTEM
05±1729
AVENSIS REPAIR MANUAL (RM1018E)
DIAGNOSIS CIRCUIT
CIRCUIT DESCRIPTION
Making short circuit between terminal TC and CG of DLC3 will output DTC from the DLC3.
WIRING DIAGRAM
05C4V±01

I35707
1CD±FTV
D5
DLC3
TC
CG13
4W±L
W±B
W±B W±LW±L
W±BW±L
TC 11
E12 17 3
DB DC
CB CA36 DBB
B
A J21 J20J8
J8
J16
J/C
ILIP Center J/B Driver Side J/BECM
*2: RHD *1: LHD (*1)(*1)
(*1)(*2)
(*2)
(*2)
(*1) (*2)
(*2) J/B
A
W±B
C52361
TC D5
DLC3
CG
05±1730
± DIAGNOSTICSCRUISE CONTROL SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
1 INSPECT DLC3(TC TERMINAL VOLTAGE)
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage according to the value(s) in the table
below.
Standard:
Tester ConnectionSpecified Condition
TC (D5 ± 13) ± CG (D5 ± 4)10 to 14 V
NG Go to step 3
OK