Method B

Remove No. 1 ignition coil.

Fig 1: No. 1 Ignition Coil With Power Transistor
Courtesy of NISSAN MOTOR CO., U.S.A.
Connect No. 1 ignition coil and No. 1 spark plug with suitable high-tension wire as shown, and attach timing light clamp to this wire.

Fig 2: Connect No. 1 Ignition Coil & No. 1 Spark Plug With Suitable High-Tension Wire, & Attach Timing Light Clamp To This Wire
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Electrode Measurements
Courtesy of NISSAN MOTOR CO., U.S.A.
Check ignition timing.

Fig 4: Checking Ignition Timing
Courtesy of NISSAN MOTOR CO., U.S.A.