22r-E, 3vz-E And 3f-E Engines
Warm up the engine, then turn it OFF. Connect a timing light to the engine following the manufacturer_s instructions.
Connect a tachometer to both battery terminals. Connect the tachometer probe to the IG-terminal in the check connector box. The check connector box is located next to the underhood fuse and relay box on trucks and 4Runner's; for Land Cruisers, the check connector box is on the firewall. Use the correct adapter to insure a tight fit on the terminal. Not all tachometers, particularly older ones are electrically compatible with this system. Read instructions for your unit before using.
Attach the tachometer as shown
3. Start the engine and run it at idle. Check the idle speed on the tachometer; adjust it to specification if necessary.
4. At the check connector, use a small jumper wire to short the connector at terminal T or TE1 and terminal E1, of the DLC1 as shown. Special service tool (SST) 09843-18020 or its equivalent can be used for this also.
Connect the SST or jumper wire to the TE1 and E1 terminals of the DLC1
This jumper will be used repeatedly during diagnostics in later sections. Take the time to make a proper jumper with correct terminals or probes. It's a valuable special tool for very low cost.
Check the idle speed, then check the ignition timing. The 22R-E should read 5° BTDC, 3VZ-FE should read 10° BTDC and the 3F-E should read 7° BTDC. All of these readings are at idle.
On 3-FE engines, remove the rubber plug at the rear of the engine to view the timing mark
On other engines, the timing mark is visible on the crankshaft pulley
Loosen the distributor pinch bolt just enough that the distributor can be turned. Aim the timing light at the marks on the crankshaft pulley (or the drive plate on 3F-E) and slowly turn the distributor until the correct timing mark aligns with the pointer. Tighten the distributor pinch bolt.
Remove the jumper wire or special service tool (SST) from the DLC1.
Check that the ignition timing advances. At idle the 22R-E should read 10°-14° BTDC, 3VZ-FE should read 8° BTDC, and the 3F-E should read 12° BTDC.
Shut the engine OFF and remove the timing light and tachometer leads.