CODE NO. P1576: Torque Control Fail (Air Flow Sensor) <4J1>
CODE NO. P1577: Torque Control Fail (Manifold Absolute Pressure Sensor) <4J1>
CODE NO. P1578: Torque Control Fail (Barometric Pressure Sensor) <4J1>
CODE NO. P1579: Torque Control Fail (Engine Coolant Temperature Sensor) <4J1>




DIAGNOSIS CODE SET CONDITIONS


This diagnosis code will be set when the engine-ECU determines that is defective according to the following conditions.
Code No. P1576
Code No. P1577
Code No. P1578
Code No. P1579

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check the MPI system diagnosis code.


Using M.U.T.-III, perform MPI system diagnosis code (Refer to GROUP 13C - Troubleshooting, Diagnosis Function ).

Q. Is any diagnosis code set?

Repair the MPI system (Refer to GROUP 13C - Troubleshooting, Inspection Chart for Diagnosis Code ). Then go to Step 3.
Go to Step 2

STEP 2. Read the diagnosis code.


(1)Use the M.U.T.-III, erase the diagnosis code of the cruise control system.
(2)Turn the ignition switch to the "ON" position, and press the cruise control ON/OFF switch to turn the cruise control system to ON (the cruise control indicator lamp <standard meter> or the cruise control display screen <high contrast meter> is turned on).
(3)After turning the cruise control system to ON, when 2 minutes or more has elapsed without operating the cruise control switches, read the diagnosis code of the cruise control system (Refer to ).

Q. Is diagnosis code No. P1576, P1577, P1578 or P1579 set?

Replace the engine-ECU (Refer to GROUP 13C - Engine-ECU ). Then go to Step 3.
It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).

STEP 3. Read the diagnosis code.


(1)Use the M.U.T.-III, erase the diagnosis code of the cruise control system.
(2)Turn the ignition switch to the "ON" position, and press the cruise control ON/OFF switch to turn the cruise control system to ON (the cruise control indicator lamp <standard meter> or the cruise control display screen <high contrast meter> is turned on).
(3)After turning the cruise control system to ON, when 2 minutes or more has elapsed without operating the cruise control switches, read the diagnosis code of the cruise control system (Refer to ).

Q. Is diagnosis code No. P1576, P1577, P1578 or P1579 set?

Return to Step 1.
This procedure is complete.