1993 DODGE TRUCK overdrive switch

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Page 848 of 1502

DODGE TRUCK 1993  Service Repair Manual 
• 

FUEL
 SYSTEM
 14-29 
MULTI-PORT
 FUEL
 INJECTION
 (MPI)-COMPONENT DESCRIPTION/SYSTEM 
OPERATION-EXCEPT DIESEL 

INDEX 

page 

Air
 Conditioning (A/C) Clutch
 Relay-Pern
 Output
 . 35 

Air
 Co

Page 849 of 1502

DODGE TRUCK 1993  Service Repair Manual 
14
 - 30
 FUEL
 SYSTEM 

INPUTS 

OUTPUTS 
 POWERTRAIN
 CONTROL 
MODULE 
 DRB
 II 

SCAN
 TOOL 

SPEED 

CONTROL 

BRAKE 

SWITCH 
 A/C
 LOW 

PRESSURE
 CUTOFF 
 SWITCH VEHICLE 

SPEED
 SENSOR  PARK/

Page 850 of 1502

DODGE TRUCK 1993  Service Repair Manual 
• 

FUEL SYSTEM
 14-31 through different system components. These compo­
nents are referred to as Powertrain Control Module 
(PCM) Outputs. The sensors and switches that pro­
vide inputs to the P

Page 853 of 1502

DODGE TRUCK 1993  Service Repair Manual 
14
 - 34
 FUEL SYSTEM 

width accordingly. During Open Loop operation, the 
PCM ignores the 02 sensor input and adjusts injector 
pulse width to a preprogrammed value (based on  other sensor inputs).

Page 867 of 1502

DODGE TRUCK 1993  Service Repair Manual 
CAV 

WIRE 

COLOR  DESCRIPTION 
CAV 
WIRE 

COLOR  DESCRIPTION 

1  DG/RD* 
MAP SENSOR  37 
BK/OR  OVERDRIVE LAMP 
2  TN/BK* 
ENGINE COOLANT TEMPERATURE SENSOR  38 PK/BK  INJECTOR DRIVE
 #5 

3  RD/

Page 895 of 1502

DODGE TRUCK 1993  Service Repair Manual 
DIESEL
 FUEL
 INJECTION—COMPONENT
 DESCRIPTION/SYSTEM
 OPERATION 

NDEX 

page 

Air
 Conditioning (A/C) Clutch
 Relay-PCM
 Output
 . 81 

Air
 Conditioning (A/C)
 Controls-PCM
 Input
 .... 77 

Ai

Page 896 of 1502

DODGE TRUCK 1993  Service Repair Manual 
• 

FUEL
 SYSTEM
 14-77 

FUEL FROM SUPPLY TANK 

LIFT
 PUMP 
LOW
 PRESSURE
 SUPPLY LINE 
FUEL/WATER SEPARATOR FILTER 
4A. FUEL HEATER 
4B. FUEL/WATER DRAIN VALVE 
FUEL/WATER SEPARATOR FILTER 
W.I.

Page 897 of 1502

DODGE TRUCK 1993  Service Repair Manual 
14-78
 FUEL SYSTEM 

• If
 the A/C low
 pressure switch opens (indicating
 a 

low refrigerant level),
 the PCM
 will
 not
 receive
 an 

A/C select signal.
 The PCM
 will then remove
 the 

ground
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