TOYOTA RAV4 2006 Service Repair Manual

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–31
PS
(a) Remove the ECU-IG1 fuse from the instrument panel
junction block.
(b) Measure the resistance of the fuse.
OK:
Below 1
NG
OK
(a) Disconnect the E18 and A1 power steering ECU
connectors.
(b) Measure the voltage of the wire harness side
connectors.
Standard voltage
NG
OK
2INSPECT FUSE (ECU-IG1)
REPLACE FUSE
3CHECK HARNESS AND CONNECTOR (BATTERY - POWER STEERING ECU)
F100916E04
Tester Connection Condition Specified Condition
E18 -5 (IG) - A1-2
(PGND)Ignition switch ON 10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR
REPLACE POWER STEERING ECU

PS–32POWER STEERING – ELECTRONIC POWER STEERING SYSTEM
PS
DESCRIPTION
When a problem occurs in the system, the power source relay circuit is shut off to stop the power assist.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON.
(c) Select the item "PIG SUPPLY" in the DATA LIST and
read the value displayed on the intelligent tester.
Power steering ECU
OK
NG
DTC C1552/22 PIG Power Supply Voltage Malfunction
DTC No. DTC Detection Condition Trouble Area
C1552/22 PIG power source circuit malfunction inside
ECU• PIG power source circuit
• Power steering ECU
1READ VALUE OF INTELLIGENT TESTER (PIG POWER SUPPLY)
B128054E05
Item Item Description: Range
(Display)Inspection Condition Specified Condition
PIG SUPPLY PIG power supply:
Min.: 0 V
Max.: 20.1531 VPower steering in operation 10 to 14 V
CHECK INTERMITTENT PROBLEMS

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–33
PS
(a) Disconnect the A1 power steering ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage
NG
OK
2CHECK WIRE HARNESS (BATTERY - POWER STEERING ECU)
F100915E03
Tester Connection Specified Condition
A1 -1 (PIG) - A1-2 (PGND) 10 to 14 V
REPAIR OR REPLACE HARNESS AND
CONNECTOR
REPLACE POWER STEERING ECU

AC–6AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
PARTS LOCATION
(2006/01- )
E123512E03

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–7
AC
E123513E01

AC–8AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
E123514E01

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–9
AC
SYSTEM DIAGRAM
(2005/11-2006/01)
E123515E02

AC–10AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
Communication table
Sender Receiver Signal Communication Line
Air conditioning amplifier ECMA/C compressor control signal
CAN Idle up request signal
External variable control solenoid
current signal
Cooling fan motor driving request
signal
Ambient temperature signal
Air conditioning amplifier Air conditioning control assemblyFront panel indication signal
LIN AUTO indication signal
A/C indication signal
MODE indication signal
REC indication signal
FRS indication signal
RDEF indication signal
Blower level indication signal
Set temperature indication signal
Combination meter assembly Air conditioning amplifierVehicle speed signal
CAN
Ambient temperature signal
ECM Air conditioning amplifierEngine revolution speed signal
CAN Engine coolant temperature
signal
A/C control cut signal
Variable control prohibition signal
Air conditioning control assembly Air conditioning amplifierAUTO switch signal
LIN OFF switch signal
A/C switch signal
DEF switch signal
MODE switch signal
RDEF switch signal
Blower switch signal (FAN+, FAN-
)
Set temperature switch signal
(UP, DOWN)

AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–11
AC
SYSTEM DIAGRAM
(2006/01- )
E127579E01

AC–12AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
Communication table
Sender Receiver Signal Communication Line
Air conditioning amplifier ECMA/C compressor control signal
CAN Idle up request signal
External variable control solenoid
current signal
Cooling fan motor driving request
signal
Ambient temperature signal
Air conditioning amplifier Air conditioning control assemblyFront panel indication signal
LIN AUTO indication signal
A/C indication signal
MODE indication signal
REC indication signal
FRS indication signal
RDEF indication signal
Blower level indication signal
Set temperature indication signal
Combination meter assembly Air conditioning amplifierVehicle speed signal
CAN
Ambient temperature signal
ECM Air conditioning amplifierEngine revolution speed signal
CAN Engine coolant temperature
signal
A/C control cut signal
Variable control prohibition signal
Air conditioning control assembly Air conditioning amplifierAUTO switch signal
LIN OFF switch signal
A/C switch signal
DEF switch signal
MODE switch signal
RDEF switch signal
Blower switch signal (FAN+, FAN-
)
Set temperature switch signal
(UP, DOWN)