2006 TOYOTA RAV4 ignition

PS–10POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
If the result is not as specified, the ECU may have a
malfunction.
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) Check the DLC3:
The power steering ECU uses CAN (ISO11898-1)
and ISO9141-2 for communication protocol. The
terminal arrangement of the DLC3 complies with
SAE J1962 and matches the ISO9141-2 format.
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ignition switch, other switches or
the doors.
If the result is not as specified, the DLC3 may have
a malfunction. Repair or replace the harness and
connector.
HINT:
Connect the cable of the intelligent tester to the
DLC3, turn the ignition switch ON and attempt to
use the tester. If the display indicates that a
communication error has occurred, there is a
problem either with the vehicle or with the tester.
PGND (A1-2) - Body
groundW-B - Body ground Power ground Always Below 1
C1 (e2-1) - PGND (A1-2) R - W-B Resolver signal Ignition switch ON
Steering wheel is turned0.68 to 4.42 V
C2 (e2-5) - PGND (A1-2) L - W-B Resolver signal Ignition switch ON
Steering wheel is turned0.68 to 4.42 V
S1 (e2-2) - PGND (A1-2) B - W-B Resolver signal Ignition switch ON
Steering wheel is turned0.68 to 4.42 V
S2 (e2-6) - PGND (A1-2) Y - W-B Resolver signal Ignition switch ON
Steering wheel is turned0.68 to 4.42 V
R1 (e2-4) - PGND (A1-2) W - W-B Resolver excitation signal Ignition switch ON
Steering wheel is turned2.9 to 5.1 V
R2 (e2-8) - PGND (A1-2) G - W-B Resolver excitation signal Ignition switch ON
Steering wheel is turned2.9 to 5.1 V
CANH (E18-2) - CANL
(E18-8)Y - W CAN communication line Ignition switch OFF 54 to 67
Symbols (Terminal No.) Wiring Color Terminal Description ConditionSpecified Condition
H100769E43
Symbols (Terminal No.) Terminal Description Condition Specified Condition
SIL (7) - SG (5) Bus [+] line During transmission Pulse generation
CG (4) - Body ground Chassis ground Always Below 1
SG (5) - Body ground Signal ground Always Below 1
BAT (16) -Body ground Battery positive Always 11 to 14 V
CANH (6) - CANL (14) HIGH-level CAN bus line Ignition switch OFF*54 to 67
CANH (6) - Battery positive HIGH-level CAN bus line Ignition switch OFF* 1 M or higher
CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch OFF* 200
or higher
CANL (14) - Battery positive LOW-level CAN bus line Ignition switch OFF* 1 M
or higher
CANL (14) - CG (4) LOW-level CAN bus line Ignition switch OFF* 200
or higher

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–14POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
FREEZE FRAME DATA
1. FREEZE FRAME DATA
NOTICE:
• It is difficult to show the specified values
(judgment values) clearly because freeze frame
data values change significantly due to
differences in measurement conditions,
surroundings, or vehicle conditions. For this
reason, there may be a problem even when the
values are within specifications.
• Turn the ignition switch ON and park the vehicle
on level ground. Check the freeze frame data by
using intelligent tester.
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON and check the freeze
frame data by following the prompts on the
intelligent tester display.
Power steering ECU
Item Item Description: Range
(Display)Inspection Condition Reference Value
BATTERY VOLTAGE Battery voltage:
Min.: 0 V
Max.: 25.5 V- 10 to 14 V
SPD Vehicle speed from meter:
Min.: 0 km/h (0 mph)
Max.: 300 km/h (187.5 mph)Vehicle stopped 0 km/h (mph)
Vehicle driven at constant speedNo significant fluctuation
ENGINE REV Show the engine revolution:
Min.: 0 rpm
Max.: 12800 rpmEngine is running at a constant
speedNo significant fluctuation
MOTOR ACTUAL Amount of current to motor:
Min.: -327.68 A
Max.: 327.67 APower steering is in operationValue changes in proportion to
steering effort
COMMAND VALUE Demanded amount of current to
motor:
Min.: -327.68 A
Max.: 327.68 APower steering is in operationValue changes in proportion to
steering effort
STR ANGL VEL Steering angle speed:
Min.: -32768
/sec.
Max.: 32767/sec.Steering wheel is turned Value changes in proportion to
steering effort
STEERING TORQUE Steering wheel torque:
Min.: -7 Nm
Max.: 7 Nm--
THERMISTOR TEMP ECU substrate temperature:
Min.: -40
C
Max.: 150
CIgnition switch ON -
PIG SUPPLY Power source voltage to activate
motor:
Min.: 0 V
Max.: 20.1531 VPower steering in operation 10 to 14 V
IG SUPPLY ECU power source voltage:
Min.: 0 V
Max.: 20.1531 VIgnition switch ON 10 to 14 V
MOTOR ROTATE Motor rotation angle:
Min.: 0
Max.: 360
Power steering in operation During steering operation, motor
rotation angle value changes from
0 to 360
MOTOR VOLTAGE Motor power supply voltage:
0 V
Max.: 45.955 VPower steering in operation -

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–17
PS
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the intelligent tester's DATA LIST allows switch,
sensor, actuator and other item values to be read without
removing any parts. Reading the DATA LIST early in
troubleshooting is one way to save time.
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON and press the intelligent
tester main switch ON.
(c) Read the DATA LIST by following the directions on
the tester screen.
Tester Display Measurement Item/Range Normal Condition Reference Value
BATTERY VOLTAGE Battery voltage:
Min.: 0 V
Max.: 25.5 V- 10 to 14 V
SPD Vehicle speed from meter:
Min.: 0 km/h (0 mph)
Max.: 300 km/h (187.5 mph)Vehicle stopped 0 km/h (0 mph)
Vehicle driven at constant speed No significant fluctuation
SPD SIG INVALID Record of vehicle speed signal
invalid:
REC or UNREC- UNREC
ENGINE REV Show the engine revolution:
Min.: 0 rpm
Max.: 12800 rpmEngine is running at a constant
speedNo significant fluctuation
ENG REV INTER Record of engine revolution
signal interruption
REC or UNREC- UNREC
MOTOR ACTUAL Amount of current to motor:
Min.: -327.68 A
Max.: 327.67 APower steering is in operation Value changes in proportion to
steering effort
COMMAND VALUE Demanded amount of current to
motor:
Min.: -327.68 A
Max.: 327.68 APower steering is in operation Value changes in proportion to
steering effort
STR ANGL VEL Steering angle speed:
Min.: -32768
/sec.
Max.: 32767
/sec.Steering wheel is turned Value changes in proportion to
steering effort
STEERING TORQUE Steering wheel torque:
Min.: -7 Nm
Max.: 7 Nm--
THERMISTOR TEMP ECU substrate temperature:
Min.: -40
C
Max.: 150
CIgnition switch ON -
PIG SUPPLY Power source voltage to activate
motor:
Min.: 0 V
Max.: 20.1531 VPower steering in operation 10 to 14 V
IG SUPPLY ECU power source voltage:
Min.: 0 V
Max.: 20.1531 VIgnition switch ON 10 to 14 V
MTR OVERHEAT Continuous overheat prevention
control record:
REC or UNREC- UNREC
MTR LOW POWER PIG power source voltage drop
record:
REC or UNREC- UNREC

PS–18POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
2. PERFORM ACTIVE TEST
HINT:
Performing the intelligent tester's ACTIVE TEST allows
relays, the VSV, actuators and other items to be
operated without removing any parts. Performing the
ACTIVE TEST early in troubleshooting is one way to
save time. The DATA LIST can be displayed in the
ACTIVE TEST.
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON and turn the intelligent
tester ON.
(c) Perform the ACTIVE TEST by following the prompts
on the tester.
Combination meter
MOTOR ROTATE Motor rotation angle:
Min.: 0
Max.: 360
Power steering in operation During steering operation, motor
rotation angle value changes from
0 to 360
MOTOR VOLTAGE Motor power supply voltage:
0 V
Max.: 45.955 VPower steering in operation -
MTR TERMINAL(U) Motor terminal voltage (U phase):
Min.: 0 V
Max.: 46.667 VSteering wheel is turned While turning the steering wheel,
a value within the range of 1 V to
approximately 0.7 V less than the
battery voltage is displayed. (The
value changes according to the
steering load.)
MTR TERMINAL(V) Motor terminal voltage (V phase):
Min.: 0 V
Max.: 46.667 VSteering wheel is turned While turning the steering wheel,
a value within the range of 1 V to
approximately 0.7 V less than the
battery voltage is displayed. (The
value changes according to the
steering load.)
MTR TERMINAL(W) Motor Terminal voltage (W
phase):
Min.: 0 V
Max.: 46.667 VSteering wheel is turned While turning the steering wheel,
a value within the range of 1 V to
approximately 0.7 V less than the
battery voltage is displayed. (The
value changes according to the
steering load.)
IG ON/OFF TIMES Ignition switch ON/OFF number
of times after fail detection:
Min.: 0 times
Max.: 65535 times--
# CODES Number of detected DTCs when
freeze frame data stored:
Min.: 0
Max.: 255 --
PS ASSIST SIG Power steering assist signal:
ON or OFF-- Tester Display Measurement Item/Range Normal Condition Reference Value
Tester Display Test Part Control Range
EPS INDIC P/S indicator
ON/OFFConfirm that vehicle is stopped, engine idling

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