Ignition Timing Inspection: Inspection

How to use this service information .

1. Ignition Timing - Inspect

   Preconditions 

   • No DTCs Set
   • Engine Warmed Up
     NOTE:

     Warm up the engine by raising the engine speed around 3,000 rpm until the cooling fan(s) comes on.

   • Idle Speed Normal Condition
   • HDS Connected

   Procedure/Specifications 

   1. Jump the SCS line with the HDS.

   2. Start the engine.

   3. Connect the timing light (a) to the service loop (white tape) (b). Check the ignition timing under the following conditions.

   NOTE:

   Check the ignition timing while aligning the upper pointer (c) and the lower pointer (d) of the cam chain case as shown.

   Tool Details 

   Name
   a	Timing Light (Commercially Available)

   Specifications 

   Position		Condition	Specification/Standard Value
   c	Upper Pointer	No load Condition (headlights, blower fan, rear window defogger, and air conditioner are turned off) At idle in P or N	The pointer and white mark should align .0 +/-2° BTDC
   d	Lower Pointer
   e	White Mark

   Courtesy of HONDA, U.S.A., INC.

   Result 

   • If the measurement is not within specifications, check the camshaft timing . If the camshaft timing is OK, update the PCM - Refer to: PCM Update or PCM Reset if it does not have the latest software, or substitute a known-good PCM , then recheck. If the system works properly, and the PCM was substituted, replace the original PCM .