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Engine Controls - Tests W/codes - 2.5L Tbi: Overview Dodge Dakota WS

Testing & Diagnostics 20 illustrations ~1028 words

MODEL IDENTIFICATION

Vehicle body codes are used throughout self-diagnostic tests. See VEHICLE BODY IDENTIFICATION table for model identification.

Model NameBody Type
Caravan & VoyagerAS
DakotaAN

VEHICLE BODY IDENTIFICATION

CONNECTOR IDENTIFICATION

ConnectorSee
A/C Clutch Relay(Scheme 27), (Scheme 28)
Auto Shutdown (ASD) Relay(Scheme 30)
Camshaft Sensor(Scheme 29)
Crankshaft Sensor(Scheme 31)
Engine Coolant Temperature (ECT) Sensor(Scheme 33)
Evaporative Purge Solenoid(Scheme 34)
Exhaust Gas Recirculation (EGR) Solenoid(Scheme 32)
Fuel Pump(Scheme 35)
Fuel Pump Relay(Scheme 36)
Idle Air Control (IAC) Motor(Scheme 37)
Intake Air Temperature (IAT) Sensor(Scheme 38)
Manifold Absolute Pressure (MAP) Sensor(Scheme 39)
Overdrive Solenoid(Scheme 40)
Oxygen Sensor(Scheme 41)
Powertrain Control Module (PCM)(Scheme 46)
Torque Converter Clutch (TCC) Solenoid(Scheme 42)
Throttle Position Sensor (TPS)(Scheme 43)
Transmission Solenoid(Scheme 44)
Transmission Temperature Sensor(Scheme 45)

CONNECTOR IDENTIFICATION

TerminalWire ColorFunction
ADark BlueIgnition 12-Volt Feed
BGrayBattery Voltage
CDark Blue/OrangeControl
DDark Blue/BlackOutput

A/C CLUTCH RELAY CONNECTOR TERMINAL ID (AN BODY)

Scheme 27

Scheme 27
Scheme 27
TerminalWire ColorFunction
ADark Blue/WhiteIgnition 12-Volt Feed
BRed/Light BlueOutput
CDark Blue/OrangeControl
DDark Blue/BlackBattery Voltage

A/C CLUTCH RELAY CONNECTOR TERMINAL ID (AN BODY)

Scheme 28

Scheme 28
Scheme 28
Terminal No.Wire ColorFunction
1Orange8-Volt Supply
2Black/Light BlueGround
3Tan/YellowSignal

CAMSHAFT POSITION SENSOR CONNECTOR TERMINAL ID

Scheme 29

Scheme 29
Scheme 29
TerminalWire ColorFunction
ADark BlueFused Ign. Sw. Output
BRed/WhiteFused Battery Voltage
CDark Blue/YellowRelay Control
DDark Green/OrangeRelay Output

ASD RELAY CONNECTOR TERMINAL ID

Scheme 30

Scheme 30
Scheme 30
Terminal No.Wire ColorFunction
1Orange8-Volt Supply
2Black/Light BlueGround
3Gray/BlackSignal

CRANKSHAFT POSITION SENSOR CONNECTOR TERMINAL ID

Scheme 31

Scheme 31
Scheme 31
Terminal No.Wire ColorFunction
1(1) Dark BlueIgnition 12-Volt Feed
2Gray/YellowControl
(1) Dark Blue/White on 2.5L AS body.
(1)Dark Blue/White on 2.5L AS body.

EGR SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 32

Scheme 32
Scheme 32
Terminal No.Wire ColorFunction
1Tan/BlackSignal
2Black/Light BlueGround

ECT SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 33

Scheme 33
Scheme 33
Terminal No.Wire ColorFunction
1(1) Dark BlueIgnition 12-Volt Feed
2Pink/BlackControl
(1) Dark Blue/White on 2.5L AS body.
(1)Dark Blue/White on 2.5L AS body.

EVAPORATIVE PURGE SOLENOID CONNECTOR TERMINAL ID

Scheme 34

Scheme 34
Scheme 34
Terminal No.Wire ColorFunction
1Dark Green/BlackFuel Pump Relay Output
2Dark BlueSending Unit Ground
3N/aNot Used
4Black/TanSending Unit Ground
5BlackFuel Pump Ground

FUEL PUMP CONNECTOR TERMINAL IDENTIFICATION

Scheme 35

Scheme 35
Scheme 35
TerminalWire ColorFunction
A(1) Dark BlueFused Ign. Sw. Output
B(2) Red/WhiteFused Battery Voltage
CDark Blue/YellowASD Relay Control
DDark Green/BlackFuel Pump Relay Output
EN/aNot Used
(1) Dark Blue/White on AS body. (2) Dark Green/White on AS body.
(1)Dark Blue/White on AS body.
(2)Dark Green/White on AS body.

FUEL PUMP RELAY CONNECTOR TERMINAL ID

Scheme 36

Scheme 36
Scheme 36
Terminal No.Wire ColorFunction
1Gray/RedIAC Driver No. 3
2Yellow/BlackIAC Driver No. 2
3Brown/WhiteIAC Driver No. 1
4Violet/BlackIAC Driver No. 4

IAC MOTOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 37

Scheme 37
Scheme 37
Terminal No.Wire ColorFunction
1Black/RedSignal
2Black/Light BlueGround

IAT SENSOR CONNECTOR TERMINAL ID

Scheme 38

Scheme 38
Scheme 38
Terminal No.Wire ColorFunction
1Black/Light BlueGround
2Dark Green/RedSignal
3Violet/White5-Volt Supply

MAP SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 39

Scheme 39
Scheme 39
Terminal No.Wire ColorFunction
1Orange/BlackTCC Solenoid Control
2Light Green/Black12-Volt Supply
3BrownSignal

OVERDRIVE SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 40

Scheme 40
Scheme 40
Terminal No.Wire ColorFunction
1Black/Light BlueSensor Ground
2Black/Dark GreenSignal
3Black/TanHeater Ground
4(1) Dark Green/BlackHeater Feed
(1) Dark Green/Orange on AN body.
(1)Dark Green/Orange on AN body.

OXYGEN SENSOR CONNECTOR TERMINAL ID

Scheme 41

Scheme 41
Scheme 41
Terminal No.Wire ColorFunction
1**Not Used
2Dark BlueIgnition 12-Volt Feed
3BlackControl

TCC SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 42

Scheme 42
Scheme 42
Terminal No.Wire ColorFunction
1Black/Light BlueGround
2Dark BlueSignal
3Violet/White5-Volt Supply

TPS CONNECTOR TERMINAL IDENTIFICATION

Scheme 43

Scheme 43
Scheme 43
Terminal No.Wire ColorFunction
1BrownOverdrive Solenoid Control
2Dark BlueIgnition 12-Volt Feed
3Orange/BlackTCC Solenoid Control

TRANSMISSION SOLENOID CONNECTOR TERMINAL ID

Scheme 44

Scheme 44
Scheme 44
Terminal No.Wire ColorFunction
1VioletSensor Signal
2Black/Light BlueGround

TRANSMISSION TEMPERATURE SENSOR CONNECTOR TERMINAL ID

Scheme 45

Scheme 45
Scheme 45

Scheme 46

Scheme 46
Scheme 46
CAUTIONWhen battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section before disconnecting battery.

TEST NTC-4A - CHECKING COOLANT SENSOR CALIBRATION & RADIATOR FAN OPERATION

  1. Start engine. Using DRB, read Engine Coolant Temperature (ECT) sensor value. If ECT sensor temperature is more than 180°F (82°C), stop engine. Allow engine coolant to cool to 150°F (66°C). Start engine. Allow engine to reach normal operating temperature of 180°F (82°C) or more. If ECT sensor value does not increase smoothly, replace ECT sensor. Perform «TEST VER-2»(ref-10881-S18660743652000111000000) . If ECT sensor value did increase smoothly, go to next step.
  2. If ECT sensor value did not reach 180°F (82°C) or more, replace ECT sensor. Perform TEST VER-2. If ECT sensor value reached 180°F (82°C) or more, run engine until radiator fan operates or ECT sensor value reaches 220°F (104°C). If cooling fan does not operate, repair cooling system as necessary. Perform TEST VER-2. If cooling fan operates, system is functioning properly. Test is complete.

TEST NTC-9A - CHECKING SOLENOID OPERATIONS

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Using DRB, actuate purge solenoid. While touching top of purge solenoid, feel for operation. If purge solenoid does not operate, replace purge solenoid. Perform «TEST VER-2»(ref-10881-S18660743652000111000000) .
  2. If purge solenoid operates, actuate EGR solenoid. While touching top of EGR solenoid, feel for operation. If EGR solenoid does not operate, replace EGR solenoid. Perform TEST VER-2. If EGR solenoid operates, test is complete.

TEST NS-7A - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Disconnect Idle Air Control (IAC) motor connector. Turn ignition on. Using DRB, actuate IAC motor. Using DRB in voltmeter mode, check voltage on IAC motor connector Gray/Red wire. If voltage is less than one volt, go to TEST NS-7B.
  2. If voltage is more than one volt, check voltage on IAC motor connector Brown/White wire. If voltage is less than one volt, go to «TEST NS-7C»(ref-10881-S00345330472000111000000) . If voltage is more than one volt, check voltage on IAC motor connector Violet/Black wire. If voltage is less than one volt, go to «TEST NS-7D»(ref-10881-S27069255982000111000000) .
  3. If voltage is more than one volt, check voltage on IAC motor connector Yellow/Black wire. If voltage is less than one volt, go to «TEST NS-7E»(ref-10881-S08916496722000111000000) . If voltage is more than one volt, turn ignition off.
  4. Remove IAC motor from throttle body. Reconnect IAC motor connector. Using DRB, actuate IAC motor. If IAC motor tip moves in and out, go to «TEST NS-8A»(ref-10881-S37203982382000111000000) . If IAC motor tip does not move in and out, replace IAC motor. Perform «TEST VER-1»(ref-10881-S08865541132000111000000) .

TEST NS-7B - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals. Repair as required. Perform «TEST VER-1»(ref-10881-S08865541132000111000000) . If PCM terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance of Gray/Red wire between IAC motor connector and PCM connector terminal No. 39. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Gray/Red wire. Perform TEST VER-1.

TEST NS-7C - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals. Repair as required. Perform «TEST VER-1»(ref-10881-S08865541132000111000000) . If PCM terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance of Brown/White wire between IAC motor connector and PCM connector terminal No. 40. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Brown/White wire. Perform TEST VER-1.

TEST NS-7D - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals. Repair as required. Perform «TEST VER-1»(ref-10881-S08865541132000111000000) . If PCM terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance of Violet/Black wire between IAC motor connector and PCM connector terminal No. 59. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Violet/Black wire. Perform TEST VER-1.

TEST NS-7E - INSPECTING IDLE AIR CONTROL MOTOR OPERATION

Note. For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION in this article. For wiring diagrams, see WIRING DIAGRAMS section.

  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect all terminals. Repair as required. Perform «TEST VER-1»(ref-10881-S08865541132000111000000) . If PCM terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance of Yellow/Black wire between IAC motor connector and PCM connector terminal No. 60. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-1. If resistance is more than 5 ohms, repair open in Yellow/Black wire. Perform TEST VER-1.

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