cruise control system TOYOTA AVENSIS 2005 Service Repair Manual

± 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)

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

C52361
TCD5
DLC3
C52361CG
D5
DLC3
±
DIAGNOSTICS CRUISE CONTROL SYSTEM
05±1731
AVENSIS REPAIR MANUAL (RM1018E)
2CHECK HARNESS AND CONNECTOR(DLC3 ± ECM)
(a)Disconnect the ECM connector.
(b)Measure the resistance according to the value(s) in the
table below.
Standard:
1AZ±FSE
Tester ConnectionSpecified Condition
TC (D5 ± 13) ± TC (E12 ± 20)1  or less
1CD±FTV
Tester ConnectionSpecified Condition
TC (D5 ± 13) ± TC (E12 ± 11)1  or less
(c)Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
TC (E12 ± 20) ± Body ground10 kor higher
TC (E12 ± 11) ± Body ground10 k or higher
NGREPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page 01±32)
3 CHECK HARNESS AND CONNECTOR(DLC3 ± BODY GROUND)
(a) Disconnect the ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard:
Tester ConnectionSpecified Condition
CG (D5 ± 4) ± Body ground10 kor higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

C52361
TCD5
DLC3
05±1732
±
DIAGNOSTICS CRUISE CONTROL SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4CHECK HARNESS AND CONNECTOR(DLC3 ± ECM)
(a)Disconnect the ECM connector.
(b)Measure the resistance according to the value(s) in the table below.
Standard:
1AZ±FSE
Tester ConnectionSpecified Condition
TC (D5 ± 13) ± TC (E12 ± 20)1  or less
1CD±FTV
Tester ConnectionSpecified Condition
TC (D5 ± 13) ± TC (E12 ± 11)1  or less
(c)Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionSpecified Condition
TC (E12 ± 20) ± Body ground10 kor higher
TC (E12 ± 11) ± Body ground10 k or higher
NGREPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
REPLACE ECM (See page 01±32)

I35709
C9
Clutch Start
SW Assy
R±W R±W
R±W R±W
R±W
W±B W±B LG±B
LG±BLG±B
LG±BLG±B
LG±B (*1)
(*2)12 9
515
6
21
568
610 J14
J/C
J19
J/C
DECM
E11
DD
6
IP CPU
CRUISEC11
C11CD
CKCE
CA Center J/B Combination Meter AssyIE2
IR1IE2
IR1 (*1) (*1) (*1) (*1)
CC
(*2)
(*2)(*2)
(*2)
*1: LHD
*2: RHD 1AZ±FSE (M/T) 05±1722
± DIAGNOSTICSCRUISE CONTROL SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
CRUISE MAIN INDICATOR LIGHT CIRCUIT
CIRCUIT DESCRIPTION
When the cruise control main switch is turned off, the cruise control does not operate.
WIRING DIAGRAM
05C4U±01

I35708
R±W
R±W
R±W
W±BW±B LG±BLG±BLG±B
3
710
21
567
610 J/C
DECM
E11
8
D
6
IP C11
C11CD
CKCA
CA Center J/B Combination Meter AssyIK2
(*1)
(*2) C
*1: LHD
*2: RHD 1AZ±FSE (A/T)
RB
DL N1
Park/neutral Position SW
IK1
R±W(*1)(*2)
CPU CRUISE1
CD CA DA DBDCD
J14J14 J19 J19
Center J/B
Driver Side J/B
R±W GAUGE2 GAUGE1
27 7 1
I35710
C9
Clutch Start
SW Assy
R±W R±W
R±W
R±W
R±W
W±B W±BLG±B
LG±BLG±B
(*1)
(*2)1 9
515
6
21
56
8
610
DECM
E11
6
IP CPU
CRUISEC11
C11CD
CKCE
CA Center J/B Combination Meter AssyIE2
IR1IE2
IR1 (*1) (*1) (*1)
(*2)
(*2)
*1: LHD
*2: RHD 1CD±FTV
LG±B
(*2) 2
± DIAGNOSTICSCRUISE CONTROL SYSTEM
05±1723
AVENSIS REPAIR MANUAL (RM1018E)

I36055
05±1724
±
DIAGNOSTICS CRUISE CONTROL SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION PROCEDURE
HINT:
In case of using the hand±held tester, start the inspection from step 1, and in case of not using the hand±held
tester, start from step 2.
1READ VALUE OF HAND±HELD TESTER
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch to the ON position, and turn the hand±held te\
ster main switch ON.
(c)Select the item ºCCS READYº in the DATA LIST and read its prompts displayed on the hand±held tes- ter.
ItemMeasurement Item /
Display (Range)Normal Condition
CCS READY MCruise control system standby
condition (Main CPU) / ON or OFFON
OFF: Change ON/OFF
each time Main SW is pushed in.
CCS READY SCruise control system standby
condition (Sub CPU) / ON or OFFON
OFF: Change ON/OFF
each time Main SW is pushed in.
NGPROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE
(See page 05±1709)
OK
2 INSPECT COMBINATION METER ASSY
(a) Disconnect the C11connector from combination meter assy.
(b) Measure voltage according to the value(s) in the table be- low.
Standard:
Tester ConnectionSpecified Condition
Terminal 21 (C11) ± Body ground10 to 14 V
Result:
OKA
NG (M/T)B
NG (A/T)C
B Go to step 4
C Go to step 7
A