Table of Contents
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ELECTRONIC IGNITION SYSTEM
STEP
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26
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INSPECTION
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Was spark consistent on all right
(one spark per crankshaft revolution)?
Note:
Check spark at spark plugs
- -
Check left side coil pack high-tension leads for
damage
insulation damage, looseness, shorting or other
Remove and check left side spark plugs for
damage, wear, carbon deposits and proper plug
ACTION
I
Go to step 27
I
Go to step 43
I
Reinstall plugs and leads
Go to step 28
8
Examine all wiring harnesses and connectors for
damaged, burned or overheated insulation,
damaged pins and loose or broken condition
Are spark plugs and leads OK?
Left coil plugs and leads are attached to the
I 1
gap
left coil ~ a c k
Warning:
Never connect PCM to
104
pin breakout
box when performing El diagnostics
Key OFF
Install El diagnostic harness to 60 pin breakout
box
Install the left coil tee (the tee is yellow)
Connect El diagnostic harness negative lead
,
to batterv
Yes
No
Go to step 29
Repair or replace damaged component
Check connectors, repair open in coil PWR circuit
(
Measure voltage between Pln 104 at 104 ptn
I
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breakout box and J7 at 60 pln breakout box
No
Check connectors, repalr open ~n cod c~rcult
I
Is voltaae areater than 10.0 volts?
Use 2 3 i El (H~gh data rate -8) overlay
Set El harness type sw~tch to "8 cyl~nder"
posrtlon
,
Key ON, englne OFF
Measure voltage between J 11 and J 7 at 60
pin breakout box
Is voltage greater than 10.0 volts?
2 9
h $ O ~ . e n ~ I n e OFF
1
Measure voltage between J10 and J7 at
60 prn breakout box
- -
I
Is voltage greater than 10 0 volts?
7
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30
Key ON, englne OFF
. ,
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--
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--
Key OFF
-
(Yes-
GO
to step 34
Disconnect the left cot1 pack from the coil tee
I
I
Leave El diagnostic harness coll tee connected to
vehlcle harness left coil connector
1 No
Go to step 41
Key ON, engrne OFF
Measure voltage between J10 and J7at 60
I
pln breakout box
Is voltage less than 0.5 volt?
34
Key ON, engine OFF
Measure voltage between J18 and J7 at 60
pin breakout box
Yes
No
. -
Yes
j
Is voltage less than 0.5 volt?
MG1097-84
-
Go to step 30
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Go to step 37
Go to step 31
asure voltage between J18 and J7 at
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pin breakout box
voltage greater than 10 0 volts?
-
en Pln 78 at 104 pin
60 p ~ n breakout box
10 0 volts?
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Yes 1 Go to step 32
,
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No
1
Check connectors, repalr open ~n coll c~rcult
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Yes
Go to step 33
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Table of Contents
Troubleshooting
