Lexus - Toyota OBD1 Diagnostic Trouble Code
51
Switch Condition Signal
Area
Air conditioner switch circuit
Air conditioner amplifier
Throttle position sensor IDL circuit
Park/Neutral position switch circuit
Accelerator pedal, cable
Engine Control Module(ECM)
Diagnosis
Displayed when A/C is ON, IDL contact OFF or shift position in "R", "D", "2", or "L" positions with the DLC1 terminals E1 and TE1 connected.
When malfunctions occur, they are not recorded in ECM memory.