Ignition Timing

Start and warm engine to normal operating temperature. Shut engine off. Connect timing light to spark plug wire on cylinder No. 1 (front cylinder at timing chain end of engine). Remove cover and connect scan tool to data link connector No. 3. See Fig 1. Scan tool is used to read engine RPM.
Apply parking brake. Place transmission in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle. Ensure idle speed is 600-700 RPM.
Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 on data link connector No. 1. See Fig 2. Data link connector No. 1 is located at passenger's side rear corner of engine compartment, near firewall.
NOTE: Timing marks are located on front cover.
Ensure base timing is within specification at idle with transmission in Neutral, and with A/C and all accessories off. See IGNITION TIMING table.
If base timing is incorrect, loosen distributor hold-down bolt. Rotate distributor to obtain correct base timing. Tighten distributor hold-down bolt. Recheck base timing.
Remove jumper wire from data link connector No. 1. Ensure ECM controlled timing is within specification. See IGNITION TIMING table. Shut engine off. Remove jumper wire, timing light and scan tool.

IGNITION TIMING ⁽¹⁾

Application

⁽²⁾ Base Timing

⁽³⁾ ECM Controlled Timing

LX 450/Land Cruiser

2-13

⁽¹⁾	Check with engine at normal operating temperature, transmission in Neutral, parking brake applied, A/C and all accessories off.

⁽²⁾	With Jumper Wire (SST 09843-18020) installed between terminals TE1 and E1 on data link connector No. 1.

⁽³⁾	With jumper wire removed from data link connector No. 1.

Fig 1: Connecting Scan Tool

Fig 2: Installing Jumper Wire Between Data Link Connector No. 1 Terminals