36
12) Optional Retest - 1987 & Newer
• Lightly press and release throttle
within 2 minutes after the last code
is sent. This will repeat the entire
cylinder balance test.
• IMPORTANT: (Some 1987 and all
1988 & newer) Repeating the test
can tell you how weak a bad
cylinder is. (The computer alters
inspection during retest.) Test
results will be different for a good,
weak or “dead” cylinder. See charts
below using cylinder #7 as an
example.
Example: All cylinders equal
1st TEST
2nd TEST
3rd TEST
Code #9 (pass)
Not necessary
Not necessary
Example: Cylinder 7 is weak
1st TEST
2nd TEST
3rd TEST
Code #7
Code #9 (pass)
Not necessary
Example: Cylinder 7 is very weak
1st TEST
2nd TEST
3rd TEST
Code #7
Code #7
Code #9 (pass)
Example: Cylinder 7 is extremely weak or dead
1st TEST
2nd TEST
3rd TEST
Code #7
Code #7
Code #7
Service Code
Test Results
9
System PASS
1
#1 Cylinder / Injector problem
2
#2 Cylinder / Injector problem
3
#3 Cylinder / Injector problem
4
#4 Cylinder / Injector problem
5
#5 Cylinder / Injector problem
6
#6 Cylinder / Injector problem
7
#7 Cylinder / Injector problem
8
#8 Cylinder / Injector problem
77
Throttle was moved during test. Testing could not be
completed. Repeat test procedure starting from step 1.
13) Turn Ignition Key to Off Position
14) Disconnect Code Scanner