TL FWD V6-3.5L (2009)
Ignition Timing: Testing and Inspection
Ignition Timing Inspection
1. Remove the engine compartment covers. See: Body and Frame/Access Cover/Service and Repair
2. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC). See: Computers and Control Systems/Testing and
Inspection/Initial Inspection and Diagnostic Overview
3. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
4. Make sure the HDS communicates with the vehicle and the powertrain control module (PCM). If it does not communicate, troubleshoot the DLC
circuit. See: Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/DLC Circuit Troubleshooting
5. Check for DTCs. See: Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview If a DTC is present,
diagnose and repair the cause before continuing with this test.
6. Start the engine. Hold the engine speed at 3,000 rpm with no load (in N or P) until the radiator fan comes on, then let it idle.
7. Check the idle speed. See: Idle Speed/Testing and Inspection
8. Jump the SCS line with the HDS.
9. Connect the timing light to the No. 1 ignition coil harness.
10. Aim the light toward the pointer (A) on the timing belt cover. Check the ignition timing under a no load condition (headlights, blower fan, rear
window defogger, and air conditioner are turned off).
NOTE: The other pointer (C) is not used.
Ignition Timing
11. If the ignition timing differs from the specification, check the cam timing. If the cam timing is OK, update the PCM if it does not have the latest
software, See: Computers and Control Systems/Testing and Inspection/Programming and Relearning/PCM Update or substitute a known-good
PCM, See: Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview then recheck. If the system works
properly, and the PCM was substituted, replace the original PCM. See: Computers and Control Systems/Engine Control Module/Service and
Repair/PCM Replacement
12. Disconnect the HDS and the timing light.
13. Install the engine compartment covers. See: Body and Frame/Access Cover/Service and Repair
