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FT
CONTROL SYSTEM (FOR 4 . 0 ~ )
I
Terminal
Connected To
1
Test Condition
1
S~ecification
Remark
Possible Cause
I
-
-
4
A -
- -
- -
-
- -
I
OID OFF l~ght ON
28
Sh~ft solenold 4 (SS4)
C- - -
- -
Open or short from CCS
(Output)
,
I
OiD OFF I i ~ h t OFF
1
IG ON B+
to PCM
-
T - - - - - - - - -
- -
- -
Transmission
control
/
Switch on
Swltch off
PID OFF
PCM
30
)
Octane acijust
I
(Input)
Constant
1
OV
1
PID CLOSED
Disconnect shorting bar
O ~ e n circult.
-
--
-
- -
-
P
-
f
31-
I -
- -
: -
-
- -
-
I
-
-r
-
-
- -
-
32
-3-
-
-
- -
c - -
- -
- -
- - -
I
+
--
-
-
-
-
-
-
-
-
-
J
-
- -
- -
- -
-
33
'
Vehlcle speed sensor
Constant
1
- -
ov
1
-
Poor ground or open from
(Input)
i
(VSS) (-)
VSS to PCM
-
-
--
--
Key ON
Open or short from
*1
sensor to PCM
Contamination
35
Heated oxygen
(Input)
sensor-12 (rear)
I
Englne runnlng at operatlng
I
temperature
Below 02V
-
-
-
Poor connection at PCM
Open from MAF to PCM
- -
-
- - -
36
I
Mass air flow (MAF)
Constant
1
(Input)
sensor return
Transmlss~on flu~d at
37
Transmlss~on fluld
amb~ent temperature
approx 3 O V
temperature (TFT)
-
- -
- -
- -
-
-
-
-
(Input)
sensor
Transm~ss~on fluid at normal
approx
operating temperature
Open or short from TFT
1
to PCM.
Transmission overheat
condition.
I
Engine coolant
Englne at operatlng
38
temperature (ECT)
temperature
(Input)
sensor
approx. 0.6V
PID 120-200°F
Open
Or
short
ECT
to PCM.
+ - - -
-
Key ON
- -
--
-
39
Intake alr temperature
H o t 2 e
(Input)
(IAT) sensor
Drlvlng 48 km/h (30 mph)
2
ov
-
,
PID 50-1200F
Open or short from IAT to
2 1V
PCM
- -
--
-
Drlvlng 88 kmlh (55 mph)
-
-
Englne off
40
Fuel pump mon~tor
- -
Englne runnlng
Open or short from fuel
pump relay to PCM
I
AIC on
41
A/C cycling switch
-
-
AIC off
B+
- -
I
I
-
PID ON
Open or short from swltch
ov
PID O F F
to PCM
-
- -
-
--
-
-
- -
-
- -
- - -
--
<
- -
,
- -
-
-
-
-
-
- -
- -
- -
- - -
-
+
-
-
-
- -
---
-
-
-
-
-
-
-
-
-
-
-
- P A P -
- -
-
- -
-
-
-
-
-
-
-
-
- - -
- -
7 -
-
-
a
-
,
-
---
-
-
-
-
-
- -
-
- -
-
-
1
-
- -
- -
-
-
46
-
-
-
-
-
-
- -
-
-
- -
-
- - -
- -
- -
--
+
T L -
7
- -
- -
--
Key ON
-
-
PI D 0%
P
-
-
---
47
EGR
vacuum regulator
Hot
Idle
- -
P
-
- -
--
- -
- -
I
- B + - - -
Open clrcult from EVR
+
- - -
-
(Output)
(EVR) solenold
Drlvlng 48 km/h (30 rnph)
1
11 5-B+
PID 0.400/~
solenold to PCM
-
-
- --
- -
- -
Drlvlng 88 kmlh (55 mph)
-I
10 8-11 1
-
-
- -
-
-
---
- -
- - -
- -
PID 35-45%
-
P
-
-
48
Clean tachometer
Key ON
-
-
--
-
- -
-
I -
i+
t -
Poor connectlon at PCM
(Output)
output to I P.
-
-
Englne running
6 . 2 ~
I
-
or GND, or open
circuit
-
-
--
-
- - -
p
p
- -
- -
- -
+
- -
Key ON
I
-
- - -
ov
I
- -
-
ov
TR sensor out of
49
Transm~ssion range
Hot Idle
- -
-
- - - -
- -
-
--
-
adjustment
lml
sensor (TR3)
Drlvlng 48 kmlh (30 rnph)
11 5V
Open or short from TR
- -
- -
--
-
-
-
P
sensor to PCM
- -
-
- -
Drlvlng 88 kmlh (55 rnph)
-
- -
- -
- -
11 5v
I
- -
-
-
- -
-
-
j
Kev ON
O V
TR sensor out of
adjustment.
Open or short from TR
sensor
to
PCM.
1
I
50
Transm~ss~on range
Hot Idle
O V
I
[ A i l ]
sensor (TR4)
-
- -
- - -
- -
- -
-
-
(Input)
Drlvlng 48 km/h (30 rnph)
-
- -
- -
11 5v
-
I
Drivlna 88 kmlh (55 mahl
11 5V
I
. ,
1
,
I
'1 :
When catalyst rnonitor is on, voltage switches at 0.45V
7BUOFT-22:
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Troubleshooting
