ZDX V6-3.7L (2010)
Ignition Timing: Testing and Inspection
Ignition Timing Inspection
1. 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.
2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
3. 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/PCM Power and Ground Circuit
Troubleshooting.
4. 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.
5. 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.
6. Check the idle speed See: Fuel Delivery and Air Induction/Idle Speed/Testing and Inspection.
7. Jump the SCS line with the HDS.
8. Connect the timing light to the No. 1 ignition coil harness.
9. Aim the light toward the pointer (A) on the timing belt lower 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
