|
ECM Connector "C" (Green) '91-'93 VIN X 3.4 TDC |
|
Pin Function |
CKT# |
Wire Color |
Component
Connector Cavity |
Codes Affect. |
Possible
Symptoms From Faulty Circuit |
|
C2 Mag VSS
Signal Low |
401 |
Purple |
Vehicle Speed
Sensor (VSS) Connector "B" |
24 (3) |
No VSS Signal,
Inoperative Speedometer, Inoperative Cruise Control |
|
C3 DIS Bypass |
424 |
Tan/Black |
DIS Module Six
Pin Connector "A" |
42 (3) |
Surge,
Hesitation, Lack of Performance |
|
C4 IAT Signal |
472 |
Tan |
IAT Sensor
Connector "B" |
25 (1) |
Poor
Performance, Hard to Start |
|
C5 Sensor
Grounds, MAP, IAT, A/C Pressure Sensor |
802 |
Black |
MAP Sensor
Connector "A", IAT Sensor Connector "A", A/C Pressure Sensor
Connector "A" |
33, 23, 66
(1) |
Rough or
Unstable Idle, Hard to Start, Sag or Hesitation, Poor
Performance, No A/C |
|
C6 Injector
Ground |
450 |
Black/White |
Engine Ground |
None |
Cranks but
will not start if both injector grounds open, Check grounds
at engine block, DIS Module, P/S Pressure Switch, Injector
Driver Grounds, Transmission Neutral Safety Switch |
|
C7 5 Volt
Reference MAP and A/C Pressure Sensor |
474 |
Gray |
MAP Sensor
Connector "C", A/C Pressure Sensor Connector "B" |
33, 34, 66
(1) |
Lack of Power,
Rough Idle Surge, hesitation, Poor Performance |
|
C8 Mag VSS
Signal High |
400 |
Yellow |
Vehicle Speed
Sensor (VSS) Connector "A" |
24 (3) |
No VSS Signal,
Inoperative Speedometer, Inoperative Cruise Control |
|
C9 EST Control |
423 |
White |
DIS Module Six
Pin Connector "B" |
42 (3) |
Surge,
Hesitation, Runs rough, Stalls, Lack of Performance |
|
C10 Sensor
Ground |
808 |
Black |
TPS Connector
"B", CTS Connector "A" |
14, 21 (1) |
Hard to Start,
High Idle, Sag or Hesitation |
|
C12 TPS
Reference |
416 |
Gray |
TPS Connector
"A" |
21, 22 (3) |
High Idle,
Surge, Lack of Performance |
|
C13 EGR
Solenoid #3 |
699 |
Red |
Digital EGR
Valve Connector "C" |
35 (3) |
High or Low
Idle, Stalls, Unstable or Incorrect Idle |
|
C15 TPS Signal |
417 |
Dk. Blue |
TPS Connector
"C" |
22 (1) |
High Idle,
Surge, Lack of Performance |
|
C16 Coolant
Temperature Signal |
410 |
Yellow |
CTS Connector
"B" |
14, 15 (3) |
Hard to Start,
Rough Idle, Lack of Performance, Exhaust Odor |
|
C17 A/C
Request |
66 |
Lt. Green |
Bulkhead
Connector C3, A/C Selector Switch |
None |
No A/C Clutch
Engagement |
|
C20 4th Gear
Signal
C20 2nd Gear
Switch (3T40 Only) |
446
232 |
Lt. Blue
White |
Tcc Solenoid
Connector "B",
Connector "C" |
None |
No 2nd or 4th
Gear Switch, Poor Fuel Economy, Chugging or Surge Condition |
|
C21 A/C
Pressure Signal |
732 |
Dk. Green |
A/C Pressure
Sensor Connector "C" |
66 (1) |
No A/C |
|
C22 MAP Sensor |
432 |
Lt. Green |
MAP Sensor
Connector "B" |
34 (3) |
Lack of
Performance, Rough Idle, Surge |
|
(1) Open
Circuit
(2) Grounded
Circuit
(3)
Open/Grounded Circuit |
