Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA20034 RUNNER 2WD V6-4.0L (1GR-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMIGNITION TIMINGTESTING AND INSPECTION
2003 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)
Ignition Timing: Testing and Inspection
2003 Toyota 4 Runner 2WD V6-4.0L (1GR-FE)SECTION Testing and Inspection
INSPECT IGNITION TIMING
a) When using hand-held tester or OBD II scan tool.
1) Connect the hand-held tester or OBD II scan tool to the DLC3.
2) Please refer to the hand-held tester or OBD II scan tool operator's for further details.
Ignition timing: 7 - 24° BTDC at idle
(Transmission in neutral position)
3) Disconnect the hand-held tester or OBD II scan tool from the DLC3.
b) When not using hand-held tester or OBD II scan tool.
1) Remove the air cleaner cap sub-assembly.
2) Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.
3) Using SST, connect the terminals TC and CG of the DLC3.
SST 09843-18040
4) Using the timing light, check the ignition timing.
Ignition timing: 10 ± 2° BTDC at idle (Transmission in neutral position)
5) Remove the SST from the DLC3.
6) Check the ignition timing.
Ignition timing: 7 - 24° BTDC at idle (Transmission in neutral position)
7) Disconnect the timing light from the engine.
8) Install the air cleaner cap sub-assembly.
a) When using hand-held tester or OBD II scan tool.
1) Connect the hand-held tester or OBD II scan tool to the DLC3.
2) Please refer to the hand-held tester or OBD II scan tool operator's for further details.
Ignition timing: 7 - 24° BTDC at idle
(Transmission in neutral position)
3) Disconnect the hand-held tester or OBD II scan tool from the DLC3.
b) When not using hand-held tester or OBD II scan tool.
1) Remove the air cleaner cap sub-assembly.
2) Connect the tester probe of a timing light to the wire of the ignition coil connector for No. 1 cylinder.
3) Using SST, connect the terminals TC and CG of the DLC3.
SST 09843-18040
4) Using the timing light, check the ignition timing.
Ignition timing: 10 ± 2° BTDC at idle (Transmission in neutral position)
5) Remove the SST from the DLC3.
6) Check the ignition timing.
Ignition timing: 7 - 24° BTDC at idle (Transmission in neutral position)
7) Disconnect the timing light from the engine.
8) Install the air cleaner cap sub-assembly.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.