DRIVEABILITY AND EMISSIONS 6E1-109
Engine Cranks But Will Not Run (Cont'd)
Step Action Value(s) Yes No
7
1. Disconnect the ignition secondary wire at the No.1.
2. Install a spark tester (Use commercially available tool)
at the end of the disconnected ignition coil.
3. Clip the spark tester (Use commercially available tool)
to a good ground (not near the battery).
4. Observe the spark tester while the engine is cranking.
Was a crisp blue spark observed? (Only one or two sparks
followed by no result is considered the same as “No
Spark." )
-
Go to Step 16 Go to Step 8
8
1. Disconnect the ignition coil harness connector.
2. Check for an open or short circuit between the ignition
coil and the ECM?
Was a problem found?
-
Go to Step 9 Go to Step 10
9 Repair the faulty circuit. - Verify repair -
10
1. Ignition ON.
2. Using a Digital Voltmeter (DVM) check the ignition wire
coil at the ignition coil harness connector?
Was the voltage equal to the specified value?
B+
Go to Step 12 Go to Step 11
11 Repair the open circuit. - Verify repair -
12
1. Ignition OFF.
2. With DVM, check for an open in the ground wire at the
ignition coil harness connector.
Was the ground wire OK?
-
Go to Step 14 Go to Step 13
13 Repair the faulty wire. - Verify Repair -
14
Replace the ignition coil, verify the repair.
Attempt to start the engine.
Is there still a problem?
-
Go to Step 15 Verify repair
15 Replace the EPROM or ECM. - Verify repair -
16
Use an ohmmeter to check the ignition coil primary
winding resistance.
Was the primary winding resistance approximately equal
to the specified value?
0.8-18Ω
Go to Step 17 Go to Step 18
17
Use an ohmmeter to check the ignition coil secondary
winding resistance.
Was the secondary winding resistance hear arround the to
the specified value? 2.5kΩ Go to Step 19 Go to Step 18
18 Replace the ignition coil. - Verify repair -
19
Test the resistance of the coil-to-spark plug secondary
ignition wire.
Was the resistance greater than the specified value?
#1 cyl. 4.7kΩ
#2 cyl. 3.9kΩ
#3 cyl. 3.4kΩ
#4 cyl. 3.1kΩ Go to Step 20 Go to Step 21
20
Replace the coil-to-spark plug secondary ignition wire and
any other secondary wires which exceed the specified
value.
Is there still a problem?
#1 cyl. 4.7kΩ
#2 cyl. 3.9kΩ
#3 cyl. 3.4kΩ
#4 cyl. 3.1kΩ Go to Step 21 Verify repair
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