Problem Symptoms Table

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use the table below to help determine the cause of the problem symptom The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table Check each symptom by checking the suspected areas in the order they are listed Replace parts as necessary.
Inspect the fuses and relays related to the system before inspecting the suspected areas below

LIN Communication System

COMMUNICATION REFERENCE

Symptom	Suspected Area	Refer to
Ram Sensor LIN Communication Malfunction	LIN communication line	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Rain sensor	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Multiplex network front light ECU (Front controller)	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
	Harness or connector	RAIN SENSOR LIN COMMUNICATION MALFUNCTION
Rear Heater Control Panel LIN Communication Malfunction	LIN communication line	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Rear power seat module switch	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Air conditioning amplifier	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
	Harness or connector	REAR HEATER CONTROL PANEL LIN COMMUNICATION MALFUNCTION
Seat Vibration System UN Communication Malfunction	LIN communication line	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Seat vibrator switch	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Seat vibrator module	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
	Harness or connector	SEAT VIBRATION SYSTEM LIN COMMUNICATION MALFUNCTION
Driver Side Switch Module LIN Communication Malfunction	LIN communication line	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Outer mirror switch	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	No 1 console switch	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Front seat climate control ECU LH	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Front seat climate control ECU RH	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Harness or connector	DRIVER SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
Rear Side Switch Module LIN Communication Malfunction	LIN communication line	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear power seat module switch	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Position control ECU LH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Position control ECU RH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear seat climate control ECU LH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Rear seat climate control ECU RH	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION
	Harness or connector	REAR SIDE SWITCH MODULE LIN COMMUNICATION MALFUNCTION