Innova 3145 Manual Del Usuario página 46

Retrieving Codes
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
The Cylinder Balance Test can be repeated by
pressing and releasing accelerator pedal (as described
in step 6, on page 41) within two minutes after the
last cylinder balance code is retrieved.
Use the A, B, C, and D examples in the "TEST
RESULTS CHART" to determine the meaning of the
test results. The chart uses the #2 cylinder as an
example, but the procedures are the same for any
cylinder.
TEST RESULTS CHART
TEST RESULTS
1st 2 nd 3rd
A 90 *
B 20 90
C 20 20
D 20 20
Test Results Chart (Examples) Explanation
A: If a code 90 is retrieved the 1st time the cylinder balance
test is performed (example A in TEST RESULTS
CHART), the system is OK, and no further testing is
required. Proceed to step 8.
43
TEST
DEFINITION
* System passed System passed.
1st test
* Fails 1st test
Passes 2nd test cylinder is firing,
90 Fails 1st test
Fails 2nd test condition is more
Passes 3rd test severe.
20 Fails 1st test
Fails 2nd test cylinder
Fails 3rd test
PROBLEM
INDICATION
All cylinders are
contributing
equally.
Weak cylinder,
but not contribu- •Partially clogged
ting the same as
the others
Same as above, but •Same as above,
Very weak or dead •Bad spark plug
4
POSSIBLE
CAUSE
•System OK
•Bad spark plug
wire or spark plug
injector or injector
circuit problem
•Mechanical
problem - rings,
valves, etc.
but the condition
is more severe.
wire or spark plug
•Open or shorts on
injector circuit,
clogged injector
•Mechanical
problem - rings
valves, etc.
Chapter 4