Problem Symptoms Table

PROBLEM SYMPTOMS CHART

Symptom	Suspect Area	Refer To
Rear left side power seat system does not operate.	ECU power source circuit Rear seat switch circuit Rear LH seat ECU	Power Source Circuit See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article.
"Slide operation" does not operate.	Rear seat switch circuit Motor circuit Position sensor circuit Rear LH seat ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. Slide Power Seat Motor Circuit Slide Position Sensor Circuit
"Headrest operation" does not operate.	Rear seat switch circuit Motor circuit Headrest limit switch circuit Position sensor circuit Rear LH seat ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. HEADREST MOTOR & Position Sensor Circuit Headrest Limit Switch Circuit
Seat position memory function does not operate.	Rear seat switch circuit Rear seat memory switch Position sensor circuit Rear LH seat ECU Rear Door LH ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. See REAR SEAT MEMORY SWITCH CIRCUIT (W/MEMORY) under CIRCUIT INSPECTION in REAR LEFT DOOR CONTROL SYSTEM - DIAGNOSTICS - LS 430 article. Slide Position Sensor Circuit
Seat position return function does not operate.	Rear seat switch circuit Rear seat turn switch circuit Rear LH seat ECU Passenger side J/B ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. See REAR SEAT RETURN SWITCH CIRCUIT under CIRCUIT INSPECTION in PASSENGER SIDE JUNCTION BLOCK (BODY NO. 3) CONTROL SYSTEM - DIAGNOSTICS - LS 430 article.
Door open return function does not operate.	Rear seat switch circuit Door courtesy switch circuit Rear LH seat ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. See DOOR COURTESY LIGHT AND COURTESY SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR LEFT DOOR CONTROL SYSTEM - DIAGNOSTICS - LS 430 article.
Vibration seat function does not operate.	Rear seat switch circuit Vibration seat ECU communication circuit Vibration circuit Rear LH seat ECU	See REAR SEAT CONTROL SWITCH CIRCUIT under CIRCUIT INSPECTION in REAR SEAT SWITCH SYSTEM - DIAGNOSTICS - LS 430 article. Vibration Seat ECU Communication Circuit Vibrator Circuit