LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 1997 >> Corolla Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Performance Adjustments >> Ignition Timing >> Ignition Timing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ignition Timing

  1. 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 belt end of engine). Connect scan tool to data link connector No. 3. See Fig 1. Scan tool is used to read engine RPM.
  2. 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 near driver's side strut tower.
  3. Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at 1000-1500 RPM for 5 seconds and then ensure engine returns to idle.
    NOTE: Timing marks are located on front cover.
  4. Ensure base timing is within specification at idle with transaxle in Neutral, and with A/C and all accessories off. See IGNITION TIMING  table.
  5. On 1.6L (4A-FE), if base timing is not within specification, loosen distributor hold-down bolts. Rotate distributor to obtain correct base timing. Tighten distributor hold-down bolts.
  6. On all models, remove jumper wire from data link connector No. 1. On 1.6L (4A-FE), ensure ECM controlled timing is within specification. See IGNITION TIMING  table. On all models, shut engine off. Remove jumper wire, timing light and scan tool.
IGNITION TIMING (Degrees BTDC @ Idle) (1)

Application (2) Base Timing (3) Controlled Timing
1.6L (4A-FE) 8-12 5-15
1.8L (7A-FE) 8-12 (4)*
(1) Check with engine at normal operating temperature, transmission/transaxle in Neutral, parking brake applied, electric cooling fan off (if equipped) and 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.
(4) Information is not available from manufacturer at time of publication.
Fig 1: Connecting Scan Tool
G97I28868Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Installing Jumper Wire Between Data Link Connector No. 1 Terminals
G95A30890Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002