LS 460 AWD V8-4.6L (1UR-FSE) (2009)
Seat Heater: Initial Inspection and Diagnostic Overview
How To Proceed With Troubleshooting
SEAT: SEAT HEATER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
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Use these procedures to troubleshoot the seat heater system.
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*: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.
2. INSPECT BATTERY VOLTAGE
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.
NEXT -- Continue to next step.
3. INSPECT ELECTRIC POWER CONTROL SYSTEM*
(a) Using the Techstream, check if the electric power control system is functioning normally.
Result
(b) Using the Techstream, check the electric power control system's load control history See: Power and Ground Distribution/Testing and
Inspection/Initial Inspection and Diagnostic Overview/Operation Check.
B -- Go to ELECTRIC POWER CONTROL SYSTEM
A -- Continue to next step.
4. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*
(a) Using the Techstream to check if the LIN communication system is functioning normally.
Result
B -- Go to LIN COMMUNICATION SYSTEM
A -- Continue to next step.
5. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
(a) Use the Techstream to check if the CAN communication system is functioning normally.
Result
B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.
6. CHECK FOR DTC*
(a) Check for DTCs See: Reading and Clearing Diagnostic Trouble Codes.