sensor TOYOTA RAV4 1996 Service Owners Manual

If cruise control operation is canceled by any canceling switch, vehicle set speed can be resumed and controlled
at the previously set speed by moving cruise control switch to RES/ACC (resume/accelerate) position. Set
speed, however, cannot be resumed if vehicle speed drops to less than 25 MPH, which clears cruise control
ECU set speed stored.
When cruise control switch is moved to RES/ACC (resume/accelerate) position while in cruise control mode,
actuator motor is energized to open engine throttle valve. Vehicle accelerates until switch is released. From then
on, cruise control ECU stores new vehicle speed and maintains that speed.
Cancel Position
When cruise control switch is moved to CANCEL position, a cancellation signal is sent to cruise control ECU
disabling cruise control operation. Previous vehicle set speed is stored in cruise control ECU memory.
CRUISE CONTROL ELECTRONIC CONTROL UNIT (ECU)
Cruise control Electronic Control Unit (ECU) constantly monitors and compares set speed with actual vehicle
speed from input sensors. When vehicle speed is greater than set speed, cruise control ECU activates actuator
motor to close engine throttle valve, reducing vehicle speed. When vehicle speed drops to less than set speed,
cruise control ECU activates actuator motor to open engine throttle valve, increasing vehicle speed.
Cruise control ECU includes a self-diagnostic function. If cruise control system is canceled by any condition
other than driver operation, cruise control ECU assumes a malfunction has occurred and may set a
corresponding trouble code.
VEHICLE SPEED SENSOR
Vehicle speed sensor is mounted on transaxle. Vehicle speed sensor rotor shaft is driven by a gear on transaxle
output shaft. For each shaft rotation, vehicle speed sensor sends a 4-pulse signal to instrument cluster and cruise
control ECU. Cruise control ECU calculates vehicle speed from this pulse signal.
SELF-DIAGNOSTIC SYSTEM
When vehicle is in cruise control mode, system will cancel due to a malfunction in actuator, vehicle speed
sensor or other cruise circuit. When cruise control functions are canceled due to a malfunction, CRUISE
indicator light will blink, indicating a trouble code is stored in cruise control ECU memory. See DIAGNOSTIC
TROUBLE CODE DEFINITIONS table under SELF-DIAGNOSTIC SYSTEM.
If a fault or symptom is present, but no trouble codes were set, a system function test can be performed. See
CRUISE CONTROL FUNCTION TEST
under TROUBLE SHOOTING.
Before proceeding with cruise control system self-diagnostic system, ensure basic inspection of system
connectors and wiring harnesses has been performed. If no faults were found during basic inspection, proceed
with self-diagnostic system.
NOTE: Intermittent failures may cause CRUISE indicator light to flicker or come on.
Light will go out after fault goes away. Fault may or may not be present at time

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M/T models, depress and release clutch pedal. On all models, if CRUISE control indicator light comes on when
switch is in OFF position and goes off when switch is in ON position, circuit for that switch being activated is
okay. Go to next step. If CRUISE control indicator does not function as indicated, see SYMPTOM
DIAGNOSIS and perform appropriate test(s).
Vehicle Speed Sensor
1. Raise vehicle and support vehicle with drive wheels off ground. Start engine and slowly depress
accelerator pedal until vehicle speed is 25 MPH or more. Turn cruise ON-OFF switch to ON position. If
CRUISE control indicator light flashes on and off every .25 second, go to next step. If CRUISE control
indicator light does not flash on and off every .25 second, see SYMPTOM DIAGNOSIS
and perform
appropriate test(s).
2. Slow vehicle speed to 25 MPH or less. If CRUISE control indicator light comes on and stays on, vehicle
speed sensor circuit is okay. Go to next step. If CRUISE control indicator light does not come on, see
SYMPTOM DIAGNOSIS
and perform appropriate test(s).
3. Cruise control function test is now complete. No problems are indicated at this time. If cruise control
system still does not function properly and no trouble codes are present, see SYMPTOM DIAGNOSIS

and perform appropriate test(s). Problem may also be intermittent.
SYMPTOM DIAGNOSIS
Symptom diagnosis should only be performed if no Diagnostic Trouble Codes (DTCs) are present. If symptom
is unknown, perform CRUISE CONTROL FUNCTION TEST
to identify problem area. Identify symptom
and perform appropriate test. Perform tests in order listed.
SET Not Occurring Or CANCEL Occurring (No DTCs Present)
Check the following components and/or circuits:
Perform CRUISE CONTROL SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 21: VEHICLE SPEED SENSOR CIRCUIT test under DIAGNOSTIC TESTS.
Perform STOPLIGHT SWITCH CIRCUIT test under SYSTEM TESTS.
Perform PARK/NEUTRAL POSITION SWITCH CIRCUIT test under SYSTEM TESTS.
Perform CLUTCH SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Check actuator control cable adjustment. See ADJUSTMENTS .
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
SET Not Occurring Or CANCEL Occurring (DTC Is Not Output)
Check the following components and/or circuits:
Perform CRUISE CONTROL ECU POWER SOURCE CIRCUIT test under SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace

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1999 ACCESSORIES & EQUIPMENT Cruise Control Systems - RAV4
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ECU.
Actual Vehicle Speed Deviates From Set Speed
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform DTC 23: VEHICLE SPEED SENSOR SIGNAL FAULT test under DIAGNOSTIC TESTS.
Perform ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) CIRCUIT test under
SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Perform IDLE SIGNAL CIRCUIT test under SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Gear Shifting Frequent Between 3rd & Overdrive When Driving Uphill (Hunting)
Check the following components and/or circuits:
Perform ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) CIRCUIT test under
SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Cruise Control Does Not Cancel Even W/Brake Pedal Depressed
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform STOPLIGHT SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Cruise Control Does Not Cancel Even With Transaxle Shifted To Neutral (A/T Only)
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform PARK/NEUTRAL POSITION SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.

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Cruise Control Does Not Cancel Even With Clutch Pedal Depressed (M/T Only)
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform CLUTCH SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Cruise Control Switch Does Not Operate (SET/COAST, RES/ACC Or CANCEL Not Possible)
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform CRUISE CONTROL SWITCH CIRCUIT test under SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
SET Possible at 25 MPH Or Less, Or CANCEL Does Not Operate At 25 MPH Or Less
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform DTC 23: VEHICLE SPEED SENSOR SIGNAL FAULT test under DIAGNOSTIC TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Poor Response In ACCEL & RESUME Modes
Check the following components and/or circuits:
Check actuator control cable adjustment. See ADJUSTMENTS .
Perform ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) CIRCUIT test under
SYSTEM TESTS.
Perform DTC 11 OR DTC 15: ACTUATOR MOTOR CIRCUIT test under DIAGNOSTIC TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
Overdrive Does Not Resume, Even Though Road Is Not Uphill
Check the following components and/or circuits:

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Perform ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) CIRCUIT test under
SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
DTC Memory Is Erased
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace ECU.
DTC Not Output, Or DTC Output When It Should Not Be
Check the following components and/or circuits:
Perform DIAGNOSTIC CIRCUIT test under SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
CRUISE Control Indicator Light Stays On Or Fails To Turn On
Check the following components and/or circuits:
Perform CRUISE CONTROL INDICATOR LIGHT CIRCUIT test under SYSTEM TESTS.
Replace cruise control ECU with a known-good ECU and retest. If symptom is no longer present, replace
ECU.
COMPONENT TESTS
VEHICLE SPEED SENSOR
1. Remove vehicle speed sensor from transaxle. See Fig. 1
. Using jumper wires, connect positive battery
terminal to vehicle speed sensor terminal No. 1 (Red/Blue wire) and negative battery terminal to terminal
No. 2 (Blue/Black wire).
2. Connect voltmeter positive lead to terminal No. 3 (Red/Yellow wire) and negative lead to terminal No. 2
(Blue/Black wire). See Fig. 5
. Rotate vehicle speed sensor shaft and ensure voltage changes from 0-11
volts or more 4 times per shaft revolution. Replace vehicle speed sensor as necessary.
SYSTEM TESTS
CRUISE CONTROL SWITCH CIRCUIT
1. Perform SET/COAST, RES/ACC, and CANCEL SWITCHES tests under CRUISE CONTROL
NOTE: To identify cruise control ECU connector terminals, see Fig. 6 . To help identify
all other cruise control related connector terminals and wire colors, see WIRING
DIAGRAMS .

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1. Check stoplight operation. If stoplight operation is okay, go to next step. If stoplights DO NOT operate
correctly, check and repair stoplight system as necessary. See WIRING DIAGRAMS
.
2. Perform CANCEL SWITCHES test under CRUISE CONTROL FUNCTION TEST
under TROUBLE
SHOOTING. If stoplight input signal is not as specified, go to next step. If stoplight input signal is as
specified, no problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM
DIAGNOSIS, perform next test listed.
3. Remove cruise control ECU with connector attached. See Fig. 1
. Turn ignition switch to ON position.
Backprobing cruise control ECU connector, measure voltage between ground and cruise control ECU
connector terminal No. 2 (Green/White wire). With brake pedal depressed, battery voltage should exist.
With brake pedal released, voltage should be less than one volt. If voltage is not as specified, go to next
step. If voltage is as specified, no problem is indicated at this time. Fault may be intermittent. If sent here
from SYMPTOM DIAGNOSIS, perform next test listed.
4. Check for open circuit in wiring harness and connectors between cruise control ECU and stoplight switch.
Repair as necessary and retest system. If wiring harness and connectors are okay, replace cruise control
ECU and retest system.
IDLE SIGNAL CIRCUIT
1. Remove cruise control ECU with connector attached. Disconnect Engine Control Module (ECM) 16-pin
connector. ECM is located behind bottom center of instrument panel, in front of console. Turn ignition
switch to ON position. Backprobing connector, measure voltage between ground and cruise control ECU
connector terminal No. 13 (Blue wire).
2. With throttle valve fully open, battery voltage should exist. With throttle valve fully closed, voltage
should be less than 2 volts. If voltage is not as specified, go to next step. If voltage is as specified, no
problem is indicated at this time. Fault may be intermittent. If sent here from SYMPTOM DIAGNOSIS,
perform next test listed.
3. Check wiring harness and connectors between ECM and TP sensor. Repair as necessary and retest
system. If wiring harness and connectors are okay, go to next step.
4. Disconnect TP sensor 3-pin Black connector. Measure resistance between TP sensor connector terminals
No. 2 (Brown wire) and No. 3 (Blue/Red wire). Resistance should be 2000-10,200 ohms with throttle
valve fully opened, and 200-6300 ohms with throttle valve fully closed. If resistance is as specified, go to
next step. If resistance is not as specified, replace TP sensor and retest system.
5. Check wiring harness and connectors between cruise control ECU and TP sensor, and between TP sensor
and ground. Repair as necessary and retest system. If wiring harness and connectors are okay, replace
cruise control ECU and retest system.
ELECTRONICALLY CONTROLLED TRANSMISSION (ECT) CIRCUIT
1. Start engine and bring to operating temperature. Drive vehicle and ensure overdrive operation is turned on
and off when overdrive ON-OFF switch is operated. If overdrive switch is okay, go to next step. If
overdrive switch is not okay, see appropriate ELECTRONIC CONTROLS article in AUTOMATIC NOTE: Ensure Throttle Position (TP) sensor circuit is operating as designed, and no
fault codes are present for TP sensor circuit. See appropriate ON-VEHICLE
ADJUSTMENTS article in ENGINE PERFORMANCE.

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plate does not operate as specified, replace cruise control actuator and retest system.
3. Check wiring harness and connector between cruise control ECU and cruise control actuator. Repair as
necessary. If wiring harness and connectors are okay, replace cruise control ECU and retest system.
Fig. 4: Checking Cruise Control Actuator Operation

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DTC 21: VEHICLE SPEED SENSOR CIRCUIT

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1. Perform VEHICLE SPEED SENSOR test under CRUISE CONTROL FUNCTION TEST under
TROUBLE SHOOTING. If speed sensor input signals are not as specified, go to next step. If speed
sensor input signals are as specified, replace cruise control ECU and retest system.
2. Check speedometer circuit. See appropriate INSTRUMENT PANELS article. If speedometer circuit is
okay, go to next step. If speedometer circuit is not okay, repair wiring harness, connector or instrument
cluster as necessary. Retest system.
3. Check wiring harness and connectors between cruise control ECU, vehicle speed sensor and instrument
cluster. Repair as necessary and retest system. If wiring harness and connectors are okay, go to next step.
4. Remove vehicle speed sensor from transaxle. See Fig. 1
. Using jumper wires, connect positive battery
terminal to vehicle speed sensor terminal No. 1 (Red/Blue wire) and negative battery terminal to terminal
No. 2 (Blue/Black wire). Connect voltmeter positive lead to terminal No. 3 (Red/Yellow wire) and
negative lead to terminal No. 2 (Blue/Black wire). See Fig. 5
. Rotate vehicle speed sensor shaft and
ensure voltage changes from 0-11 volts or more 4 times per shaft revolution. Replace vehicle speed
sensor as necessary. If vehicle speed sensor is okay, replace cruise control ECU and retest system.
Fig. 5: Testing Vehicle Speed Sensor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DTC 23: VEHICLE SPEED SENSOR SIGNAL FAULT
Check vehicle speed sensor. See COMPONENT TESTS
. Replace vehicle speed sensor as necessary. If

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vehicle speed sensor is okay, replace cruise control ECU and retest system.
PIN VOLTAGE TESTS
Cruise control ECU pin testing chart is used for diagnosing intermittent symptoms and faults that are unable to
be resolved during self-diagnostics. Pin test ensures cruise control ECU is receiving and transmitting proper
voltage signals. To perform pin voltage test, remove cruise control ECU with connector attached. See Fig. 1
.
Test cruise control ECU voltages by backprobing ECU connector using a DVOM with ignition switch in ON
position, unless otherwise specified. If voltage readings are as specified, cruise control ECU may be faulty. See
Fig. 6
.

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Fig. 3: Adjusting Dimension Between Rear Side Of Center Bearing Housing & Rear Side Of Bracket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REAR DRIVE AXLES
1. Raise and support vehicle. Remove rear wheel. Remove ABS sensor. Remove cotter pin and lock cap.
Depress and hold brake pedal and remove hub nut.
2. Place reference marks on rear drive axle and differential side gear shaft. Remove 4 nuts and washers.
Disconnect rear drive axle from differential side gear shaft. Remove drive axle from axle carrier.
3. To install, reverse removal procedure. Check operation of axle and ABS sensor.
COMPANION FLANGE & OIL SEAL
Removal
Remove drive shaft. See DRIVE SHAFT . Using a chisel and hammer, unstake companion flange nut. Remove
nut. Using puller, remove companion flange, oil seal and oil slinger. Discard oil seal. Using puller, remove front
bearing and spacer. Discard bearing and spacer.
Installation
1. Install NEW bearing and spacer. Install oil slinger and NEW oil seal. Drive NEW oil seal .08" (2.0 mm)
below differential case surface. Apply grease to oil seal lip. To complete installation, reverse removal

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