4WS doesnt work after rack change
04-19-2008, 09:51 PM
#1
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4WS doesnt work after rack change
I just had my rack replaced at a shop but now my 4WS doesnt work. I checked the fuses, and they are all fine. I didnt get an alignment yet but could it not work because my wheels are out of alignment?
Thanks
Thanks
04-21-2008, 08:08 AM
#5
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Troubleshooting (4WS)
Diagnostic Trouble Code (DTC)
The 4WS indicator light displays a code by a series of long and short blinks. This indicator light can display multiple component
problems by blinking separate codes, one after another. The number of long blinks equals the first digit of the
code, the number of short blinks equals the second digit. When there are multiple codes, there is a two second pause
between the codes.
System problems can be detected by both the main and sub central processing units (CPUs) in the 4WS control unit.
Each CPU can memorize up to 10 codes. If both CPUs have stored codes, the 4WS indicator light will:
Blink quickly once as an indicator light check, (this happens only when the ignition switch is first turned on).
Pause for three seconds.
Display the codes stored in the main CPU.
Pause for 3.0 seconds.
Blink rapidly for three seconds to indicate the switch between the main and sub CPU.
Pause for 3.0 seconds.
Display the codes stored in the sub CPU.
Pause for six seconds, then repeat the cycle.
This cycle will continue until the ignition is turned OFF.
NOTE:
• Be sure to check both CPUs for at least 10 codes before turning OFF the ignition switch.
• If the main and sub CPUs display the same codes, those codes need only be checked once.
problems by blinking separate codes, one after another. The number of long blinks equals the first digit of the
code, the number of short blinks equals the second digit. When there are multiple codes, there is a two second pause
between the codes.
System problems can be detected by both the main and sub central processing units (CPUs) in the 4WS control unit.
Each CPU can memorize up to 10 codes. If both CPUs have stored codes, the 4WS indicator light will:
Blink quickly once as an indicator light check, (this happens only when the ignition switch is first turned on).
Pause for three seconds.
Display the codes stored in the main CPU.
Pause for 3.0 seconds.
Blink rapidly for three seconds to indicate the switch between the main and sub CPU.
Pause for 3.0 seconds.
Display the codes stored in the sub CPU.
Pause for six seconds, then repeat the cycle.
This cycle will continue until the ignition is turned OFF.
NOTE:
• Be sure to check both CPUs for at least 10 codes before turning OFF the ignition switch.
• If the main and sub CPUs display the same codes, those codes need only be checked once.
To display the Diagnostic Trouble Code (DTC)
(1) Pull out the service check connector (2P) located behind the center console and connect the two terminals of the
connector with a jumper wire.
(2) Turn the ignition switch ON, but do not start the engine.
(3) Watch as the 4WS indicator light blinks to display the code.
(4) Record the codes.
NOTE:
• Be sure to record the code. If you do any of the following, the code will be erased.
— Disconnect the battery terminals.
— Remove No. 43 CLOCK RADIO (10 A) fuse from the under-hood fuse/relay box.
— Disconnect the 4WS control unit connector.
• If the engine is started with the service connector jumped, the Malfunction Indicator Lamp (MIL) will stay on.
DTC indication patternconnector with a jumper wire.
(2) Turn the ignition switch ON, but do not start the engine.
(3) Watch as the 4WS indicator light blinks to display the code.
(4) Record the codes.
NOTE:
• Be sure to record the code. If you do any of the following, the code will be erased.
— Disconnect the battery terminals.
— Remove No. 43 CLOCK RADIO (10 A) fuse from the under-hood fuse/relay box.
— Disconnect the 4WS control unit connector.
• If the engine is started with the service connector jumped, the Malfunction Indicator Lamp (MIL) will stay on.
04-21-2008, 06:14 PM
#6
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Ok I just did the troubleshoot and this is what it does:
2 long blinks, 2-3 sec. pause, 2 long blinks, 2-3 sec. pause, 2-3 sec. fast blinking.
I assume this is code 20
My ABS light also blinked:
2 long, 1 short
Code 21
What should I start looking at?
Thanks
2 long blinks, 2-3 sec. pause, 2 long blinks, 2-3 sec. pause, 2-3 sec. fast blinking.
I assume this is code 20
My ABS light also blinked:
2 long, 1 short
Code 21
What should I start looking at?
Thanks
04-21-2008, 06:18 PM
#7
Driving a Turbo 2L Terror
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Diagnostic Trouble Codes (DTCs): 20, 22, 24, 28
—The 4WS indicator light has
been reported on.
—With service check connector
jumped codes 20, 22, 24, 28
are indicated.
been reported on.
—With service check connector
jumped codes 20, 22, 24, 28
are indicated.
Disconnect the front main steering
angle sensor connector.
Turn the ignition switch ON.
Measure voltage between the
4WS control unit side connector
No. 1 terminal (BLK/YEL) and
body ground.
Is there battery voltage?
Measure the voltage between the
4WS control unit side of the sensor
connector No. 4 terminal (LT
GRN) and body ground.
Is there approximately 4.5 V?
(To page
angle sensor connector.
Turn the ignition switch ON.
Measure voltage between the
4WS control unit side connector
No. 1 terminal (BLK/YEL) and
body ground.
Is there battery voltage?
Measure the voltage between the
4WS control unit side of the sensor
connector No. 4 terminal (LT
GRN) and body ground.
Is there approximately 4.5 V?
(To page
17-56)
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
4WS CONTROL UNIT SIDE CONNECTOR
View from terminal side.
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
Repair open in the harness wire
between the No. 22 4WS fuse
and the front main steering angle
4WS CONTROL UNIT SIDE CONNECTOR
Repair open in the harness wire
between the No. 22 4WS fuse
and the front main steering angle
Disconnect the 4WS control unit
18P connector.
Check for continuity between the
4WS control unit No. 8 terminal
(GRN) and body ground.
Is there continuity?
Connect the 4WS control unit
18P connector.
Measure voltage between the
4WS control unit No. 8 terminal
(GRN) and body ground.
Is there approximately 4.5 V?
18P connector.
Check for continuity between the
4WS control unit No. 8 terminal
(GRN) and body ground.
Is there continuity?
Connect the 4WS control unit
18P connector.
Measure voltage between the
4WS control unit No. 8 terminal
(GRN) and body ground.
Is there approximately 4.5 V?
Repair open in the GRN wire between
the 4WS control unit and
the front main steering angle
sensor.
the 4WS control unit and
the front main steering angle
sensor.
View from terminal side.
4WS CONTROL UNIT 18P
SENSOR SIDE CONNECTOR
Continuity?
SENSOR SIDE CONNECTOR
Continuity?
View from terminal side.
Repair short in the GRN wire between
the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
Replace the 4WS control unit.
the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
Replace the 4WS control unit.
View from terminal side.
Battery Voltage?
4.5 V?
4.5 V?
4.5 V?
4.5 V?
Troubleshooting (4WS)
Diagnostic Trouble Codes (DTCs): 20, 22, 24, 28 (cont'd)
(From page
17-55)
Measure the voltage between the
4WS control unit side of the sensor
connector No.3 terminal (BLU)
and body ground.
Is there approximately 4.5 V?
(To page 17-57)
Measure the voltage between the
4WS control unit side of the sensor
connector No.3 terminal (BLU)
and body ground.
Is there approximately 4.5 V?
(To page 17-57)
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
4WS CONTROL UNIT SIDE CONNECTOR
Disconnect the 4WS control unit
18P connector.
Check for continuity between the
4WS control unit No. 3 terminal
(BLU) and body ground.
Is there continuity?
Is there approximately 4.5 V?
View from terminal side.
18P connector.
Check for continuity between the
4WS control unit No. 3 terminal
(BLU) and body ground.
Is there continuity?
Is there approximately 4.5 V?
View from terminal side.
4WS CONTROL UNIT 18P
SENSOR SIDE CONNECTOR
SENSOR SIDE CONNECTOR
View from terminal side.
Repair short in the BLU wire between
the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
View from terminal side.
Replace the 4WS control unit.
Repair open in the BLU wire between
the 4WS control unit and
the front main steering angle
sensor.
Repair open in the BLU wire between
the 4WS control unit and
the front main steering angle
sensor.
Connect the 4WS control unit
18P connector.
18P connector.
Continuity
(From page
17-56)
Measure the voltage between the
4WS control unit side of the sensor
connector No. 2 terminal
(YEL/RED) wire and body ground.
Is there approximately 4.5 V?
(To page 17-58)
Measure the voltage between the
4WS control unit side of the sensor
connector No. 2 terminal
(YEL/RED) wire and body ground.
Is there approximately 4.5 V?
(To page 17-58)
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
4WS CONTROL UNIT SIDE CONNECTOR
Disconnect the 4WS control unit
18P connector.
Check for continuity between the
4WS control unit No. 1 5 terminal
(YEL/RED) and body ground.
Is there continuity?
Is there approximately 4.5 V?
View from terminal side.
18P connector.
Check for continuity between the
4WS control unit No. 1 5 terminal
(YEL/RED) and body ground.
Is there continuity?
Is there approximately 4.5 V?
View from terminal side.
4WS CONTROL UNIT 18P
SENSOR SIDE CONNECTOR
SENSOR SIDE CONNECTOR
View from terminal side.
Repair short in the YEL/RED wire
between the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
Replace the 4WS control unit.
Repair open in the YEL/RED wire
between the 4WS control unit and
the front main steering angle
sensor.
between the 4WS control unit and
the main steering angle sensor.
4WS CONTROL UNIT 18P CONNECTOR
Replace the 4WS control unit.
Repair open in the YEL/RED wire
between the 4WS control unit and
the front main steering angle
sensor.
Measure voltage between the
4WS control unit No. 1 5 terminal
(YEL/RED) and body ground.
Connect the 4WS control unit
18P connector.
View from terminal side.
4WS control unit No. 1 5 terminal
(YEL/RED) and body ground.
Connect the 4WS control unit
18P connector.
View from terminal side.
Troubleshooting (4WS)
Diagnostic Trouble Codes (DTCs): 20, 22, 24, 28 (cont'd)
(From page
17-57)
Check for voltage between the
No.2 terminal (YEL/RED) and the
No. 5 terminal (BLK) of the 4WS
control unit side connector of the
front main steering angle sensor.
Is there approximately 4.5 V?
Reconnect the front main steering
angle sensor 5P connector.
While turning the steering wheel,
check for the signals between the
following 4WS control unit terminals
and the body ground with an
analog voltmeter on the DC range.
A-phase:
Between the No. 8 terminal (GRN)
and body ground: should pulse
0 4.5 V rapidly (every 2°)
B-phase:
Between the No. 15 terminal
(YEL/RED) and body ground:
should pulse 0 4.5 V rapidly (every
2°)
Check for voltage between the
No.2 terminal (YEL/RED) and the
No. 5 terminal (BLK) of the 4WS
control unit side connector of the
front main steering angle sensor.
Is there approximately 4.5 V?
Reconnect the front main steering
angle sensor 5P connector.
While turning the steering wheel,
check for the signals between the
following 4WS control unit terminals
and the body ground with an
analog voltmeter on the DC range.
A-phase:
Between the No. 8 terminal (GRN)
and body ground: should pulse
0 4.5 V rapidly (every 2°)
B-phase:
Between the No. 15 terminal
(YEL/RED) and body ground:
should pulse 0 4.5 V rapidly (every
2°)
Z-phase:
Between the No. 12 terminal
(BLU) and body ground: should
pulse 0 4.5 V once per steering
wheel revolution
Are the signals available between
the respective terminal
and the body ground?
Check the Z-phase neutral position
(see page
Between the No. 12 terminal
(BLU) and body ground: should
pulse 0 4.5 V once per steering
wheel revolution
Are the signals available between
the respective terminal
and the body ground?
Check the Z-phase neutral position
(see page
17-146).
Is the Z-phase in the straight
driving position?
Is the Z-phase in the straight
driving position?
Perform troubleshooting for DTCs
10, 12, 16.
(see page
10, 12, 16.
(see page
17-45).
Repair the poor ground (G 401,
402,404) or open in the BLK wire
between the front main steering
angle sensor and body ground.
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
Repair the poor ground (G 401,
402,404) or open in the BLK wire
between the front main steering
angle sensor and body ground.
FRONT MAIN STEERING ANGLE SENSOR
4WS CONTROL UNIT SIDE CONNECTOR
4.5 V?
View from terminal side
4WS CONTROL UNIT 18P CONNECTOR
View from terminal side
Replace the front main steering
angle sensor.
Adjust the front main steering angle
sensor neutral position
(see page 17-15).angle sensor.
Adjust the front main steering angle
sensor neutral position