2006 TOYOTA RAV4 warning

STEERING COLUMN – STEERING COLUMN ASSEMBLYSR–21
SR
(b) Attach the 4 claws to install the lower steering
column cover.
11. INSTALL STEERING WHEEL ASSEMBLY
(a) Align the matchmarks and install the steering wheel
onto the steering column.
(b) Install the nut.
Torque: 50 N*m (510 kgf*cm, 37 ft.*lbf)
(c) Connect all the connectors to the spiral cable.
12. INSTALL STEERING PAD (See page RS-336)
13. POSITION FRONT WHEELS FACING STRAIGHT
AHEAD
14. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
15. INSPECT SRS WARNING LIGHT
(a) Inspect the SRS warning light (see page RS-52).
C128491
C132123E02

PS–8POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "Suspected area" column of
the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace parts as
necessary.
Electronic power steering system
Symptom Suspected area See page
Heavy steering1. Front tires (improperly inflated, unevenly worn)TW-1
2. Front wheel alignment (incorrect)SP-3
3. Front suspension (lower ball joint)SP-27
4. Steering gear assemblyPS-42
5. Power steering motor PS-25
6. Power source voltage of power steering ECUPS-37
7. Power steering ECUPS-46
Steering effort differs between turning right and left, or
steering effort uneven1. Front tires (improperly inflated, unevenly worn)TW-1
2. Front wheel alignment (incorrect)SP-3
3. Front suspension (lower ball joint)SP-27
4. Steering gear assemblyPS-42
5. Torque sensor (built into steering column) PS-22
6. Steering column assemblySR-11
7. Power steering motor PS-25
8. Power steering ECUPS-46
While driving, steering effort does not change in
accordance with vehicle speed or steering wheel does
not return properly1. Front suspension (lower ball joint)SP-27
2. Speed sensorBC-28
3. Skid control ECUBC-41
4. Torque sensor (built into steering column) PS-22
5. Power steering motor PS-25
6. Power steering ECUPS-46
7. Controlling CAN communication systemCA-8
Friction occurs when turning steering wheel during low
speed driving1. Power steering motor PS-25
2. Steering column assemblySR-11
High-pitched sound (squeaking) occurs when turning
steering wheel slowly with vehicle stopped1. Power steering motor PS-25
Steering wheel vibrates and noise occurs when turning
steering wheel with vehicle stopped1. Power steering motor PS-25
2. Steering column assemblySR-11
P/S warning always indicated on combination meter1. Power source voltage of power steering ECUPS-37
2. Combination meterME-53
3. Power steering ECUPS-46

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–11
PS
• If communication is normal when the tester is
connected to another vehicle, inspect the DLC3
of the original vehicle.
• If communication is still not possible when the
tester is connected to another vehicle, the
problem may be in the tester itself. Consult the
Service Department listed in the tester's
instruction manual.
2. WARNING LIGHT
(a) When a problem occurs in the electronic power
steering system, the P/S warning light on the
combination meter comes on to inform the driver of
the problem.
DTC CHECK / CLEAR
1. CHECK DTC
(a) When using intelligent tester:
(1) Connect the intelligent tester (with CAN VIM) to
the DLC3.
(2) Turn the ignition switch ON and press the
intelligent tester main switch ON.
(3) Read the DTCs by following the prompts on the
intelligent tester.
HINT:
Refer to the intelligent tester operator's manual
for further details.
(b) When not using intelligent tester:
(1) Using SST, connect terminals 13 (TC) and 4
(CG) of the DLC3.
SST 09843-18040
(2) Turn the ignition switch ON.
C128851E01
B127989E01
H100769E10

PS–12POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
(3) Read and write down any DTCs indicated by the
P/S warning light on the combination meter.
Refer to the chart below for examples of a
normal code and DTCs 21 and 22.
HINT:
• If the P/S warning light does not blink to
display any DTCs set or the normal code,
inspect the circuit shown in the table below.
• If two or more malfunctions are detected
simultaneously, DTCs will be displayed in
ascending numerical order.
(4) Refer to the Diagnostic Trouble Code Chart (See
page PS-16) for DTC information.
2. CLEAR DTC
(a) When using intelligent tester:
(1) Connect the intelligent tester (with CAN VIM) to
the DLC3.
(2) Turn the ignition switch ON and press the
intelligent tester main switch ON.
(3) Clear the DTCs by following the prompts on the
intelligent tester.
(4) Turn the ignition switch OFF.
(5) Disconnect the intelligent tester from the DLC3.
B128060E02
Trouble Area See Page
EPS warning light circuitPS-37

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–13
PS
(b) When not using intelligent tester:
(1) Using SST, connect terminals 12 (TS) and 4
(CG) of the DLC3.
SST 09843-18040
(2) Turn the ignition switch ON.
(3) Disconnect the SST check wire from terminal 4
(CG) and reconnect it, and repeat this procedure
4 times or more within 8 seconds.
(4) Check that the P/S warning light blinking pattern
is the normal code.
(5) Turn the ignition switch OFF.
(6) Remove SST from the DLC3.
H100769E03

PS–16POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
FAIL-SAFE CHART
If a problem occurs in the electric power steering system, the
P/S warning light will come on in the combination meter and
steering power assist will be stopped, fixed at a particular
point, or decreased simultaneously to protect the system.
Electronic power steering system
HINT:
The amount of power assist may be decreased to prevent the
motor and ECUs from overheating if the steering wheel is
continuously turned when the vehicle is either stopped or
driven at a low speed, or if the steering wheel is kept at either
full lock position for a long time. In such cases, the amount of
power assist returns to normal if the steering wheel is not
turned for approximately 10 minutes with the engine idling.
DTC No. Detection Condition Fail-safe
C1511/11 Torque sensor malfunction Power assist stops
C1512/11
C1513/11
C1514/11
C1521/25 Motor malfunction
C1524/24
C1528/12 Motor rotation angle sensor malfunction
C1531/25 ECU malfunction
C1532/25
C1534/25
C1551/25 IG power source voltage error
C1552/22 PIG power source voltage error
C1554/23 Power source relay malfunction
C1555/25 Motor relay malfunction
C1533/25 ECU malfunction Assist force restricted
U0073/49 CAN bus malfunction Amount of power assist is locked at 140 km/h
(87.5 mph) level of power assist
U0121/42 Skid control ECU communication error
U0105/41 ECM communication error Power assist stops

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–19
PS
DIAGNOSTIC TROUBLE CODE CHART
HINT:
If any DTCs are displayed during the DTC check, inspect the
circuit listed for these DTCs. For details of each DTC, refer to
the page indicated in the DTC chart.
Electric Power Steering System
DTC No. Detection Item Trouble Area Normal Function
Return ConditionP/S Warning Light See page
C1511/11 Torque Sensor 1
Malfunction- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-18
C1512/11 Torque Sensor 2
Malfunction- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-18
C1513/11 Torque Sensor
Deviation Excessive- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-18
C1514/11 Torque Sensor Power
Supply Voltage
Malfunction- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-18
C1521/25 Short in Motor Circuit - Power steering ECU Ignition switch ON
again
PS-21
C1524/24 Motor Terminal
Voltage Malfunction- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-22
C1528/12 Motor Rotation Angle
Sensor Malfunction- Steering column
assembly (Torque
sensor)
- Power steering ECUIgnition switch ON
again
PS-24
C1531/25 ECU Malfunction - Power steering ECU Ignition switch ON
again
PS-26
C1532/25 ECU Malfunction - Power steering ECU Ignition switch ON
again
PS-26
C1533/25 Temperature Sensor
Circuit is Low or High- Power steering ECU Ignition switch ON
again or after normal
confirmation
PS-26
C1534/25 EEPROM
Malfunction- Power steering ECU Ignition switch ON
again
PS-26
C1551/25 IG Power Supply
Voltage Malfunction- ECU-IG1 fuse
- IG power source
circuit
- Power steering ECUIgnition switch ON
again or after normal
confirmation
PS-27
C1552/22 PIG Power Supply
Voltage Malfunction- PIG power source
circuit
- Power steering ECUIgnition switch ON
again or after normal
confirmation
PS-29
C1554/23 Power Supply Relay
Failure- PIG power source
circuit
- Power steering ECUIgnition switch ON
again
PS-31
C1555/25 Motor Relay Welding
Failure- Power steering ECU Ignition switch ON
again
PS-31
C1581/26 Assist Map Number
Un-Writing- Power steering ECU Assist map write or
ignition switch ON
again
PS-32
U0073/49 Control Module
Communication Bus
Off- CAN
communication
systemIgnition switch ON
again
PS-34

PS–20POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
HINT:
: Warning light comes on
X: Warning light turns off (normal reset)
U0105/41 Lost Communication
with Fuel Injector
Control Module- CAN
communication
system
- ECMIgnition switch ON
again or after normal
confirmationX PS-34
U0121/42 Lost Communication
with Anti-Lock Brake
System (ABS)
Control Module- CAN
communication
system
- Skid control ECUIgnition switch ON
again or after normal
confirmation
PS-34 DTC No. Detection Item Trouble Area Normal Function
Return ConditionP/S Warning Light See page