Identifying condition LEXUS LS430 2003 Factory Repair Manual

Fig. 4: Identifying Air Conditioning System Components And Replacements Location (1 Of 2)
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Fig. 5: Identifying Air Conditioning System Components And Replacements Location (2 Of 2)
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Fig. 31: Identifying Air Conditioning Panel Sub-Assy Components And Replacements
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REPLACEMENT
HINT:
Installation is in the reverse order of removal.
See COMPONENTS .
1.RESTORE SHIP MODE SETTING (W/ CD CHANGER) (See PRECAUTION
)
2.REMOVE INSTRUMENT PANEL FINISH PANEL LOWER CENTER (See step 26 in
REPLACEMENT
)
3.REMOVE PANEL INSTRUMENT CLUSTER FINISH LOWER (See step 27 in
REPLACEMENT
)
4.REMOVE RADIO RECEIVER ASSEMBLY W/BRACKET (See step 4 in REPLACEMENT
)
5.CONFIRM SHIP MODE (W/ CD CHANGER) (See PRECAUTION
)
6.REMOVE TEMPERATURE CONTROL SWITCH ASSY
a. Using a screwdriver, release the 2 claws and remove the temperature control switch.
HINT:
Tape the screwdriver tip before use.
b. Employ the same manner described above to the other side.
c. Disconnect the connectors.

Fig. 40: Identifying Air Conditioning Radiator Assy Components And Replacements (1 Of 2)
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Fig. 41: Identifying Air Conditioning Radiator Assy Components And Replacements (2 Of 2)
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Fig. 104: Identifying Rear Air Conditioning Unit Assy Components And Replacements (1 Of 2)
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Fig. 105: Identifying Rear Air Conditioning Unit Assy Components And Replacements (2 Of 2)
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Fig. 7: >Identifying Terminals Of T9 ECU
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a. Disconnect the T9 ECU connector.
b. Measure the voltage and resistance of the wire harness side connector.
Standard:
SPECIFIED CONDITION
Symbols (Terminal
No.)
Wiring Color
Terminal
Description
Condition
Specified
Condition
CPUB (T9-1) - GND
(T9-14)V-Y - W-B+B (CPUB) power
supplyAlways10 to 14V
GND (T9-14) - Body
groundW-B - Body
groundGroundAlwaysBelow 1 ohms

Fig. 8: Identifying Terminals Of Steering Lock ECU
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a. Disconnect the S46 ECU connector.
b. Measure the voltage and resistance of the wire harness side connector.
Standard:
SPECIFIED CONDITION
Symbols
(Terminal No.)Wiring
ColorTerminal
DescriptionConditionSpecified Condition
CPUB (S46-1) -
Body groundV-Y - Body
ground+B (CPUB)
Power supplyAlways10 to 14V
+B (S46-10)-
Body groundR-L - Body
ground+B Power supplyAlways10 to 14V
LG-B -1: No key in starter

If the result is not as specified, there may be a malfunction on the wire harness side.
c. Reconnect the S46 ECU connector.
d. Measure the voltage of the connector.
Standard:
SPECIFIED CONDITION
If the result is not as specified, the ECU may have a malfunction.
3.CHECK DRIVER DOOR ECU
Fig. 9: Identifying Terminals Of Driver Door ECU

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a. Disconnect the D25 ECU connector.
b. Measure the voltage and resistance of the wire harness side connector.
KSW (S46-12) -
Body groundBody
groundUnlock warning
switch inputswitch --> 2: Key
inserted1: 10 kohms or higher
--> 2: Below 1 ohms
PUSH (S46-11)-
Body groundP-B -Body
groundPush switch input
1: No key in starter
switch --> 2: Key
inserted1: 10 kohms or higher
--> 2: Below 1 ohms
GND (S46-9) -
Body groundW-B -Body
groundGroundAlwaysBelow 1ohms
Symbols (Terminal
No.)Wiring
ColorTerminal
DescriptionConditionSpecified
Condition
KSW (S46-12) -
GND (S46-9)LG-B - W-
BUnlock warning
switch input1: No key in ignition cylinder -
-> 2: Key inserted1: 10 to 14V -->
2: 0V
PUSH (S46-11) -
GND (S46-9)P-B - W-BPush switch input1: No key in ignition cylinder -
-> 2: Key inserted1: 10 to 14V -->
2:0V