Page 2801 of 4770
A00307
ON
VSV is ON VSV is OFF
Air Filter Air
Air
E
FE
F
BE6653
FI7073 FI7074
Air Filter
± DIAGNOSTICSENGINE (1MZ±FE)
DI±381
616 Author: Date:
INSPECTION PROCEDURE
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester and check operation of VSV for ACIS.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(d) Select the ACTIVE TEST mode on the TOYOTA hand±
held tester.
CHECK:
Check operation of VSV when VSV is operated by the TOYOTA
hand±held tester.
OK:
VSV is ON:
Air from pipe E is flowing out through pipe F.
VSV is OFF:
Air from pipe E is flowing out through the air filter.
OK Check for vacuum tank (See page SF±51).
NG
2 Check VSV for ACIS (See page SF±60).
NG Replace VSV for ACIS.
OK
Page 2802 of 4770
A02041
ON
ACIS (+)
DI±382
± DIAGNOSTICSENGINE (1MZ±FE)
617 Author: Date:
3 Check for open and short in harness and connector between EFI main relay
(Marking: EFI) and ECM (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).
OBD II scan tool (excluding TOYOTA hand±held tester)
1 Check VSV for ACIS (See page SF±60).
NG Replace VSV for ACIS.
OK
2 Check voltage between terminal ACIS of ECM connector and body ground.
PREPARATION:
(a) Remove the glove compartment (See page SF±73).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal ACIS of the ECM connector
and body ground.
OK:
Voltage: 9 ~ 14 V
NG Check for open and short in harness and con-
nector between EFI main relay (Marking: EFI)
and ECM (See page IN±31).
OK
Page 2803 of 4770
± DIAGNOSTICSENGINE (1MZ±FE)
DI±383
618 Author: Date:
3 Check for vacuum tank (See page SF±60).
NG Repair or replace.
OK
Check and replace ECM (See page IN±31).
Page 2804 of 4770

A07453
5
1B±R
1ECM Engine Room J/B
E77
STA
E1 S2
Starter W±B 9 5
2D
2K 3
2
Sarter Relay MAIN
2B3
2J 11 B
J7
J7 J8
Junction
Connector CB
B II210 From Battery
W±B
W±B
A
A J11
Junction
Connector
IG Instrument
Panel J/B
STARTER
From Ignition Switch11
II2
B±W(A/T)
B±W(A/T)
B±W
Park/Neutral
Position Switch 6
5
B±W(A/T)
B
B
B
1J
1K 3
4
B±W(M/T)
12
Clutch Start Switch
GR
*1GR1
*1B±O
*GR
*GR
*GR
*B±O(M/T)
J16
Junction
Connector
*B±O
*: TMMK made
*
1: TMC made
*1B±O
DI±384
± DIAGNOSTICSENGINE (1MZ±FE)
619 Author: Date:
Starter Signal Circuit
CIRCUIT DESCRIPTION
When the engine is cranked, the intake air flow is slow, so fuel vaporization is poor. A rich mixture is therefore
necessary in order to achieve good startability. While the engine is being cranked, the battery positive volt-
age is applied to terminal STA of the ECM. The starter signal is mainly used to increase the fuel injection
volume for the starting injection control and after±start injection control.
WIRING DIAGRAM
DI08B±06
Page 2805 of 4770
± DIAGNOSTICSENGINE (1MZ±FE)
DI±385
620 Author: Date:
INSPECTION PROCEDURE
HINT:
This diagnostic chart is based on the premise that the engine is cranked normally. If the engine is not
cranked, proceed to the problem symptoms table on page DI±221.
TOYOTA hand±held tester
1 Connect TOYOTA hand±held tester, and check STA signal.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±held tester main switch ON.
CHECK:
Read STA signal on the TOYOTA hand±held tester while starter operates.
OK:
Ignition switch positionONSTART
STA signalOFFON
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI±221).
NG
2 Check for open in harness and connector between ECM and starter relay
(See page IN±31).
NG Repair or replace or connector.
OK
Check and replace ECM (See page IN±31).
Page 2806 of 4770
A07152
ON
STA (+)
DI±386
± DIAGNOSTICSENGINE (1MZ±FE)
621 Author: Date:
OBD II scan tool (excluding TOYOTA hand±held tester)
1 Check voltage between terminal STA of ECM connector and body ground.
PREPARATION:
Remove the glove compartment (See page SF±73).
CHECK:
Measure voltage between terminal STA of the ECM connector
and body ground during engine cranking.
OK:
Voltage: 6 V or more
OK Proceed to next circuit inspection shown on
problem symptom table (See page DI±221).
NG
2 Check for open in harness and connector between ECM and starter relay
(See page IN±31).
NG Repair or replace harness or connector.
OK
Check and replace ECM (See page IN±31).
Page 2807 of 4770

DI02U±02
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freeze Frame Data (Precheck)
Record or Print DTC and Freeze Frame Data P.
DI±389
Clear DTC and Freeze Frame Data P. DI±389
Visual Inspection
Setting the Check Mode Diagnosis P.
DI±389
1
Items insideare titles of pages in this manual, with the
page number indicated in the bottom portion. See the indicated
pages for detailed explanations.
P.
DI±388
Connect an OBD II scan tool or TOYOTA hand±held tester to DLC3.
If the display shows ºUNABLE TO CONNECT TO VEHICLEº when you have connected the
scan tool / TOYOTA hand±held tester, inspect DLC3 P.
DI±389
2
3
4
5
6
Symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
P.
IN±21Symptom occurs
DTC CheckP. DI±389OK Code11Preliminary Check
P.
DI±389
DTC Chart
P. DI±401Mechanical System Test
P.
DI±389
Manual Shifting Test
P.
DI±389 OK
OK
Chapter 1
(Electronic)Chapter 2
(On±Vehicle)
P.
DI±405 OK
Chapter 3
(Off±Vehicle)OK Problem Symptoms Table± P. DI±405
Circuit
InspectionO/D Cancel Signal Check
O/D Main Switch & O/D OFF Indica-
tor Light Circuit Check
NG
Parts Inspection
NG
NGNG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12NG
13
14
15
16 17 9
10
P. DI±405P. DI±405
P. DI±428 to DI±431
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
DI±387
622 Author: Date:
AUTOMATIC TRANSAXLE (A140E)
HOW TO PROCEED WITH TROUBLESHOOTING
Page 2808 of 4770
DI02V±02
Transaxle Control
System Check SheetInspector 's
Name:
Customer 's Name
Registration No.
Registration Year
Frame No.
Date Vehicle
Brought InOdometer Readingkm
mile / /
/ /
Date Problem
Occurred
How Often Prob-
lem Occurs ?/ /
Continuous Intermittent ( times a day)
Symptoms
Vehicle does not move ( Any position Particular position )
No up±shift ( 1st " 2nd 2nd " 3rd 3rd " O/D )
No down±shift ( O/D " 3rd 3rd " 2nd 2nd " 1st )
Lock±up malfunction
Shift point too high or too low
Harsh engagement ( N " D Lock±up Any drive position )
Slip or shudder
No kick±down
Others
Check ItemMalfunction
Indicator Lamp
DTC Check
1st Time
2nd Time Normal code Malfunction code (Code ) Normal Remains ON
Normal code Malfunction code (Code ) DI±388
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A140E)
623 Author: Date:
CUSTOMER PROBLEM ANALYSIS CHECK