2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual c. Turn the ignition switch to the ON position.  
d. Push the "ON" button of the hand-held tester.  
e. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".  
f. According to the dis

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LEXUS LS430 2003  Factory Repair Manual Standard:  
Fig. 80: Stop Lamp Switch Reference Chart
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE STOP LAMP SWITCH ASSY  
OK: Go to next step  
2.CHECK HARNESS AND CONNECTOR (STOP LAMP

Page 2763 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 81: Identifying ECM Connectors 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Standard:  
Fig. 82: Stop Lamp Switch Reference Chart
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR R

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LEXUS LS430 2003  Factory Repair Manual OK: REPLACE ECM (See REPLACEMENT)
DTC P0729: GEAR 6 INCORRECT RATIO 
SYSTEM DESCRIPTION 
The ECM uses signals from the output speed sensor SP2 and input speed sensor NT to detect the actual gear 
posi

Page 2765 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 84: DTC Reference Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
HINT: 
Gear positions in the event of a solenoid valve mechanical problem: 
Fig. 85: Gear Position Specification
 
Courtesy

Page 2766 of 4500

LEXUS LS430 2003  Factory Repair Manual TYPICAL ENABLING CONDITIONS 
The following items are common to all conditions below.  
TYPICAL ENABLING CONDITIONS TABLE 
Condition (A)  
TYPICAL ENABLING CONDITIONS TABLE - A 
Condition (B)  
TYPICAL

Page 2767 of 4500

LEXUS LS430 2003  Factory Repair Manual Both of the following conditions are met: Condition (A) and (B)
Condition (A)  
TYPICAL MALFUNCTION THRESHOLDS TABLE - CONDITION A 
Condition (B)  
TYPICAL MALFUNCTION THRESHOLDS TABLE - CONDITION B

Page 2768 of 4500

LEXUS LS430 2003  Factory Repair Manual a. Warm up the engine.  
b. Turn the ignition switch off.  
c. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface 
module) to the DLC3.  
d. Turn the ign