Engine Control - Hard Starting/Rough Idle
89toyota10REFERENCE ENGINE
NUMBER 011
DATE 10-20-89
MODEL RN
TITLE 22R-E, 22R-TE HARD STARTING/ROUGH IDLE
The following parts are now available to improve the startability and idle stability after a hot dead soak or an extended dead soak.
MODIFICATION INFORMATION:
YEAR/MODEL APPLICATION:
PART NUMBER INFORMATION:
PRODUCTION CHANGE INFORMATION:
CONDITION 1: Temperature Switch No. 2 specification (same as
field fix) changed at beginning of 1988 model year.
CONDITION 2: ECU modification at beginning of 1988 model year to
activate cold start injector at higher temperature (22R-E only).
REPAIR PROCEDURE:
1. Replace cold start injector time switch with the new part.
2. On vehicles equipped with a pressure-up system, (see application chart on page 1) also replace Temperature Switch No. 2 with the modified one.
3. For vehicles equipped with Air Conditioning, the ACV terminal must be disconnected from the ECU when installing the modified Temperature Switch No. 2 (Condition 1). This is necessary to prevent the Engine Idle-Up from working continuously after warmup.
HOW TO REMOVE THE WIRE TERMINAL
1. Insert a miniature screwdriver from the open end. Move the locking clip to the unlocking direction ( ) and hold it in this position.
Do not apply excessive force to the terminal.
Do not pry the terminal with the screwdriver.
2. Carefully remove the terminal without using excessive force.
3. Wrap the removed wire terminal with electrical tape. Tuck the terminal into the harness protector and secure with electrical tape.