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DRIVEABILITY AND EMISSIONS - FUEL INJECTION (TBI) 6E2-A-1
SECTION A
2.5L ENGINE
Cold Oxygen Sensor
DIAGNOSTIC CIRCUIT CHECK
On some engines, the Oxygen Sensor will cool off
The "Diagnostic Circuit Check" verifies the
after only a short period of operation at idle. This will
system is functioning correctly. Some special
put the system into "Open Loop." To restore "Closed
considerations to keep in mind while making the
Loop" operation, run the engine at part throttle
"Diagnostic Circuit Check" are:
several minutes and accelerate from idle to part
throttle a few times.
Blocking Drive Wheels
BASIC PROCEDURE
The vehicle drive wheels should always be blocked
while checking the system.
If you have not reviewed the Basic Information on
how to use the Diagnostic Procedures, go to the
Introduction of this section.
SECTION A
ENGINE COMPONENTS / WIRING DIAGRAMS / DIAGNOSTIC CHARTS
C o m p o n e n t L o c a t i o n s . . • •
• • • • • • • • • • • • • • • •
• * . »
• • • • • • • • • •
P a g e A - 2
W i r i n g D i a g r a m s
• •
. . . . . .
P a g e A - 3 , 4 , 5
E C M T e r m i n a l E n d V i e w
. . « . « , . . . .
P a g e A - 6
Diagnostic Circuit C h e c k
P a g e A - 8
No "Service E n g i n e S o o n " L i g h t - C h a r t A-1
. . .
.
P a g e A - 1 0
No A L D L D a t a or W o n ' t Flash C o d e 12 " S e r v i c e E n g i n e S o o n " Light O n S t e a d y - C h a r t A - 2
P a g e A - 1 2
E n g i n e C r a n k s But W o n ' t Run (1 of 3 ) C h a r t A - 3
, „
e
. .
. .
*
. . . . . • P a g e A - 1 4
Fuel P u m p Relay Circuit C h a r t A - 5
o
•
P a g e A - 2 0
Fuel System Diagnosis (1 of 2) C h a r t A - 7
. • • •
< >
P a g e A - 2 2
C o d e 13 O x y g e n Sensor Circuit
. * . < > . * < >
.
P a g e A - 2 6
C o d e 14 C o o l a n t Sensor Circuit (High T e m p . Indicated)
. . . . . .
P a g e A - 2 8
C o d e 15 C o o l a n t Sensor Circuit ( L o w T e m p . Indicated)
• • • • • . . • < , . . • • • • • •
P a g e A - 3 0
C o d e 21 Throttle Position S e n s o r Circuit (Signal V o l t a g e High)
P a g e A - 3 2
C o d e 22 Throttle Position S e n s o r Circuit ( S i g n a l V o l t a g e L o w )
P a g e A - 3 4
C o d e 23 M A T S e n s o r Circuit ( L o w T e m p . Indicated)
P a g e A - 3 6
C o d e 24 V e h i c l e S p e e d Sensor (VSS) Circuit
P a g e A - 3 8
C o d e 25 M A T S e n s o r Circuit ( High T e m p . Indicated)
P a g e A - 4 0
C o d e 33 M A P S e n s o r Circuit (Signal V o l t a g e High - L o w V a c u u m ) . . . .
P a g e A - 4 2
C o d e 34 M A P S e n s o r Circuit (Signal V o l t a g e L o w - High V a c u u m )
P a g e A - 4 4
C o d e 35 Idle S p e e d Error
.
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o
o
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P a g e A - 4 6
C o d e 42 E l e c t r o n i c Spark T i m i n g Circuit
P a g e A - 4 8
C o d e 44 O x y g e n Sensor Circuit ( L e a n E x h a u s t Indication)
P a g e A - 5 0
C o d e 45 O x y g e n Sensor Circuit (Rich E x h a u s t Indication)
P a g e A - 5 2
C o d e 51 Faulty P R O M
•
P a g e A - 5 4
C o d e 53 System O v e r V o l t a g e
.
P a g e A - 5 4
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