TOYOTA RAV4 1996 Service Repair Manual

Fig. 26: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Camry)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 30 © 2005 Mitchell Repair Information Company, LLC.

Fig. 27: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Camry Solara)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 31 © 2005 Mitchell Repair Information Company, LLC.

Fig. 28: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Celica)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 32 © 2005 Mitchell Repair Information Company, LLC.

Fig. 29: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Corolla)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 33 © 2005 Mitchell Repair Information Company, LLC.

Fig. 30: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (RAV4)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 34 © 2005 Mitchell Repair Information Company, LLC.

Fig. 31: Installing Jumper Wire Between Data Link Connector No. 1 Terminals (Tacoma & 4Runner)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
IDLE SPEED & MIXTURE
4-CYLINDER IDLE SPEED & MIXTURE
Camry, Camry Solara, Celica, Corolla, RAV4, Tacoma & 4Runner
NOTE: Mixture adjustment is not possible on any model.
NOTE: Idle speed is controlled by Engine Control Module (ECM) and is not adjustable.
Check idle speed with engine at normal operating temperature,
transmission/transaxle in Neutral, parking brake applied, air cleaner and all
vacuum hoses installed, electronic fuel injection system wiring connectors
properly installed, ignition timing properly set, electric cooling fan off (if
equipped), and A/C and all accessories off.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 35 © 2005 Mitchell Repair Information Company, LLC.

1. Start engine and warm engine to normal operating temperature. Shut engine off. Remove cover (if
equipped) and connect scan tool to data link connector No. 3. See Fig. 19
-Fig. 25 . Scan tool is used to
read engine RPM.
2. Apply parking brake. Place transmission/transaxle in Neutral. Start engine and maintain engine at 2500
RPM for 90 seconds and then allow engine to idle. Ensure idle speed is within specification. See IDLE
SPEED SPECIFICATIONS table.
3. If idle speed is not within specification, check air intake system, Idle Air Control (IAC) valve, wiring and
Engine Control Module (ECM). See IDLE CONTROL SYSTEM in SYSTEM & COMPONENT
TESTING - 4-CYLINDER article. Shut engine off. Remove scan tool.
IDLE SPEED SPECIFICATIONS
(1)
THROTTLE POSITION SENSOR
4-CYLINDER THROTTLE POSITION SENSOR
Camry & Camry Solara
1. Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information
available is for checking resistance of TP sensor.
2. Disconnect electrical connector from TP sensor. Note electrical terminals on TP sensor. See Fig. 32
.
Apply vacuum to throttle opener.
3. Using ohmmeter, check resistance between specified terminals in relation to throttle position. See
THROTTLE POSITION SENSOR RESISTANCE
table. Replace components as necessary if
resistance is not within specification.
Celica
1. Disconnect electrical connector from Throttle Position (TP) sensor. Loosen TP sensor mounting screws.
Connect ohmmeter between terminals IDL and E2. See Fig. 33
.
2. Apply vacuum to throttle opener. To set initial clearance, insert .024" (.60 mm) feeler gauge between
throttle stop screw and throttle lever.
3. Gradually rotate TP sensor clockwise until ohmmeter deflects. Tighten TP sensor mounting screws.
Remove feeler
gauge. Reinsert a .020" (.50 mm) feeler gauge. Continuity should exist between terminals
ApplicationRPM
Camry, Camry Solara, Celica &
Corolla650-750
RAV4700-800
Tacoma & 4Runner650-750
(1)Check with engine at normal operating temperature, transmission/transaxle
in Neutral, parking brake applied, air cleaner and all vacuum hoses
installed, electronic fuel injection system wiring connectors properly
installed, ignition timing properly set, electric cooling fan off (if
equipped), and A/C and all accessories off.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 36 © 2005 Mitchell Repair Information Company, LLC.

IDL and E2. Remove feeler gauge.
4. Reinsert a .028" (.70 mm) feeler gauge. No continuity should exist between terminals IDL and E2.
Remove feeler gauge and ohmmeter. Install electrical connector on TP sensor.
Corolla
1. Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information
available is for checking resistance of TP sensor.
2. Disconnect electrical connector from TP sensor. Note electrical terminals on TP sensor. See Fig. 34
.
3. Using ohmmeter, check resistance between specified terminals in relation to throttle position. See
THROTTLE POSITION SENSOR RESISTANCE
table. Replace components as necessary if
resistance is not within specification.
RAV4
1. Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information
available is for checking resistance of TP sensor.
2. Note location of E2 terminal (Brown wire), VC terminal (Yellow wire) and VTA terminal (Blue/Red
wire) on TP sensor. Disconnect electrical connector from TP sensor. Apply vacuum to throttle opener.
3. Using ohmmeter, check resistance between specified terminals in relation to throttle position. See
THROTTLE POSITION SENSOR RESISTANCE
table. Replace components as necessary if
resistance is not within specification.
Tacoma & 4Runner
1. Manufacturer does not list procedure for Throttle Position (TP) sensor adjustment. Only information
available is for checking resistance of TP sensor.
2. Disconnect electrical connector from TP sensor. Note electrical terminals on TP sensor. See Fig. 35
.
Apply vacuum to throttle opener.
3. Using ohmmeter, check resistance between specified terminals in relation to throttle position. See
THROTTLE POSITION SENSOR RESISTANCE
table. Replace components as necessary if
resistance is not within specification.
THROTTLE POSITION SENSOR RESISTANCE
ApplicationThrottle PositionTerminalsOhms
Camry & Camry
Solara
(1)
Fully ClosedVTA & E2200-5700
Fully OpenVTA & E22000-10,200
VC & E22500-5900
CorollaFully ClosedVTA & E2200-5700
Fully OpenVTA & E22000-10,200
VC & E22500-5900
RAV4, Tacoma &
4Runner
(1)
Fully ClosedVTA & E2200-5700

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 37 © 2005 Mitchell Repair Information Company, LLC.

Fig. 32: Identifying TP Sensor Terminals (Camry & Camry Solara)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fully OpenVTA & E22000-10,200
VC & E22500-5900
(1)Apply vacuum to throttle opener before checking TP sensor.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 38 © 2005 Mitchell Repair Information Company, LLC.

Fig. 33: Identifying TP Sensor Terminals (Celica)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

1999 Toyota RAV4
1999 ENGINE PERFORMANCE On-Vehicle Adjustments - 4-Cylinder
Microsoft
Sunday, November 22, 2009 10:25:31 AMPage 39 © 2005 Mitchell Repair Information Company, LLC.