6F-4 IGNITION SYSTEM
STEP ACTION YES NO
6 Ignition Coil Power Supply and Ground Circuit
Check
1) Check ignition coil power supply (“B/W” wire)
circuit for open and short.
Are circuits in good condition?
Go to Step 7. Repair or replace.
7 Ignition Coil Check
1) Check ignition coil for resistance, referring to
“Ignition Coil” in this section.
Is check result satisfactory?
Go to Step 8. Replace ignition coil
assembly.
8 CMP Sensor Check
1) Check CMP sensor and signal rotor, referring to
“Distributor Unit” in this section.
Is check result satisfactory?
Go to Step 9 on the
next page.
Adjust or replace.
9 Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal (“Br/Y” or “Or” wire)
circuit for open, short and poor connection.
Are circuits in good condition?
Go to Step 10. Repair or replace.
10 Igniter Check
1) Check igniter, referring to “Igniter” in this section.
Is check result satisfactory?
Go to Step 11. Replace igniter.
11 Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?
Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.
Go to Step 12.
12 Ignition Timing Adjustment and Recheck
1) Adjust initial ignition timing, referring to “Ignition
Timing” in this section.
2) Recheck initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?
System is in good
condition.
Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.
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