Engine Controls - Tests W/codes - 3.0L: Overview — Dodge Caravan III (1995-2000)

CONNECTOR IDENTIFICATION

Connector	Illustration
A/C Pressure Sensor	(Scheme 52)
Brake Switch	(Scheme 53)
Camshaft Position Sensor	(Scheme 54)
Crankshaft Position Sensor	(Scheme 55)
Data Link Connector	(Scheme 56)
Downstream Oxygen Sensor	(Scheme 57)
EGR Solenoid	(Scheme 58)
Engine Coolant Temperature Sensor	(Scheme 59)
EVAP Purge Solenoid	(Scheme 60)
Fuel Tank Module	(Scheme 61)
Idle Air Control Motor	(Scheme 62)
Ignition Coil	(Scheme 63)
Injector	(Scheme 64)
Injector Wiring Harness (Injector Side)	(Scheme 65)
Injector Wiring Harness (PCM Side)	(Scheme 66)
Leak Detection Pump	See scheme 18
MAP Sensor	(Scheme 67)
Output Speed Sensor 4-Speed A/T	(Scheme 68)
Park/Neutral Switch 3-Speed A/T	(Scheme 69)
Powertrain Control Module (PCM)	(Scheme 70)
Radiator Cooling Fan Relay	See scheme 23
Speed Control Servo	See scheme 24
Throttle Position Sensor	(Scheme 71)
Torque Converter Clutch Solenoid: 3-Speed A/T	(Scheme 73)
Transmission Control Module 4-Speed A/T	(Scheme 72)
Transmission Range Sensor 4-Speed A/T	(Scheme 74)
Upstream Oxygen Sensor	See scheme 29
Vehicle Speed Sensor 3-Speed A/T	(Scheme 75)

CONNECTOR IDENTIFICATION DIRECTORY

Scheme 52

Terminal	Wire Color	Function
1	Violet/White	5-Volt Supply
2	Black/Light Blue	Sensor Ground
3	Not Used	Not Used
4	Dark Blue	Sensor Signal

A/C PRESSURE SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 53

Terminal	Wire Color	Function
1	White/Pink	Brake Switch Sense
2	Black	Ground
3	Yellow/Red	S/C On/Off Switch Output
4	Dark Blue/Red	S/C Brake Switch Output
5	White/Tan	Brakelight Switch Output
6	Pink/Dark Blue	Fused B+

BRAKE SWITCH CONNECTOR TERMINAL IDENTIFICATION

Scheme 54

Terminal	Wire Color	Function
1	Black/Light Blue	Sensor Ground
2	Orange	8-Volt Supply
3	Tan/Yellow	Sensor Signal

CAMSHAFT POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 55

Terminal	Wire Color	Function
1	Orange	8-Volt Supply
2	Black/Light Blue	Sensor Ground
3	Gray/Black	Sensor Signal

CRANKSHAFT POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 56

Terminal	Wire Color	Function
3	Violet/Brown	CCD Bus (+)
4	Black/Light Green	Ground
5	Black/White	Ground
6	Light Green	SCI Receive
7	Pink	SCI Transmit
11	White/Black	CCD Bus (-)
14	Pink/Light Blue	SCI Receive (TCM)
16	Pink	Fused B+

DATA LINK CONNECTOR TERMINAL IDENTIFICATION

Scheme 57

Terminal	Wire Color	Function
1	Black/Tan	Heater Ground
2	Dark Green/Orange	Auto Shutdown Relay Output
3	Black/Light Blue	Sensor Ground
4	Tan/White	Sensor Signal

DOWNSTREAM OXYGEN SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 58

Terminal	Wire Color	Function
1	Gray/Yellow	EGR Solenoid Control
2	White/Black	Fused Ign. Switch Output

EGR SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 59

Terminal	Wire Color	Function
1	Black/Light Blue	Sensor Ground
2	Tan/Black	Sensor Signal

ENGINE COOLANT TEMP. SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 60

Terminal	Wire Color	Function
1	Pink/Black	EVAP Purge Solenoid Control
2	White/Black	Fused B+

EVAP PURGE SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 61

Terminal	Wire Color	Function
1	Dark Green/White	Fuel Pump Relay Output
2	Dark Blue	Fuel Level Sensor Signal
3	Not Used	Not Used
4	Black	Ground

FUEL TANK MODULE CONNECTOR TERMINAL IDENTIFICATION

Scheme 62

Terminal	Wire Color	Function
1	Violet/Black	IAC Motor No. 4 Driver
2	Brown/White	IAC Motor No. 3 Driver
3	Yellow/Black	IAC Motor No. 2 Driver
4	Gray/Red	IAC Motor No. 1 Driver

IDLE AIR CONTROL MOTOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 63

Terminal	Wire Color	Function
1	Gray	Ignition Coil Driver
2	Dark Green/Orange	Auto Shutdown Relay Output

IGNITION COIL CONNECTOR TERMINAL IDENTIFICATION

Scheme 64

Terminal	Wire Color	Function
1 (1)	White/Dark Blue	Injector No. 1 Driver
1 (1)	Tan	Injector No. 2 Driver
1 (1)	Yellow/White	Injector No. 3 Driver
1 (1)	Light Blue/Brown	Injector No. 4 Driver
1 (1)	Gray	Injector No. 5 Driver
1 (1)	Brown/Dark Blue	Injector No. 6 Driver
2	Dark Green/Orange	Auto Shutdown Relay Output
(1) Connectors are same for all injectors except wire color at terminal No. 1. Listed are wire colors for specified injector driver at terminal No. 1.

(1)	Connectors are same for all injectors except wire color at terminal No. 1. Listed are wire colors for specified injector driver at terminal No. 1.

INJECTOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 65

Terminal	Wire Color	Function
1	Light Blue/Brown	Injector No. 4 Driver
2	Yellow/White	Injector No. 3 Driver
3	Tan	Injector No. 2 Driver
4	White/Dark Blue	Injector No. 1 Driver
5	Dark Green/Orange	Auto Shutdown Relay Output
6	Not Used	Not Used
7	Brown/Dark Blue	Injector No. 6 Driver
8	Gray	Injector No. 5 Driver

INJECTOR WIRING HARNESS CONNECTOR (INJECTOR SIDE) TERMINAL ID

Scheme 66

Terminal	Wire Color	Function
1	White/Dark Blue	Injector No. 1 Driver
2	Tan	Injector No. 2 Driver
3	Yellow/White	Injector No. 3 Driver
4	Light Blue/Brown	Injector No. 4 Driver
5	Gray	Injector No. 5 Driver
6	Brown/Dark Blue	Injector No. 6 Driver
7	Not Used	Not Used
8	Dark Green/Orange	Auto Shutdown Relay Output

INJECTOR WIRING HARNESS CONNECTOR (PCM SIDE) TERMINAL ID

Terminal	Wire Color	Function
1	Yellow/Black	Pump Switch Sense
2	White/Dark Green	Solenoid Control
3	White/Black	Fused Ign. Switch Output
4	Not Used	Not Used

LEAK DETECTION PUMP CONNECTOR TERMINAL IDENTIFICATION

Scheme 67

Terminal	Wire Color	Function
1	Black/Light Blue	Sensor Ground
2	Dark Green/Red	Sensor Signal
3	Violet/White	5-Volt Supply

MAP SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 68

Terminal	Wire Color	Function
1	Dark Blue/Black	Sensor Ground
2	Light Green/White	Output Speed Sensor Signal

OUTPUT SPEED SENSOR CONNECTOR TERMINAL ID (4-SPEED A/T)

Scheme 69

Terminal	Wire Color	Function
1	Violet/Black	Reverse Light Sense
2	Black/White	Park/Neutral Switch Sense
3	White	Fused Ign. Switch Output

PARK/NEUTRAL SWITCH CONNECTOR TERMINAL ID (3-SPEED A/T)

Scheme 70

Terminal No.	Wire Color	Function
4	Dark Green	Generator Field Driver
5	Yellow/Red	Speed Control Power Supply
6	Dark Green/Orange	Auto Shutdown Relay Output
7	Yellow/White	Injector No. 3 Driver
10	Black/Tan	Ground
11	Gray	Ign. Coil Driver No. 1
13	White/Dark Blue	Injector No. 1 Driver
14	Brown/Dark Blue	Injector No. 6 Driver
15	Gray	Injector No. 5 Driver
16	Light Blue/Brown	Injector No. 4 Driver
17	Tan	Injector No. 2 Driver
20	White/Black	Fused Ign. Switch Output
22	Black/Pink	MIL Driver
26	Tan/Black	Coolant Temp. Sensor Signal
30	Black/Dark Green	Upstream O2 Sensor Signal
32	Gray/Black	Crank Position Sensor Signal
33	Tan/Yellow	Cam Position Sensor Signal
35	Orange/Dark Blue	TPS Signal
36	Dark Green/Red	MAP Sensor Signal
41	Red/Light Green	Speed Control Switch Signal
42	Dark Blue	A/C Pressure Switch Sense
43	Black/Light Blue	Sensor Ground
44	Orange	8-Volt Supply
45	Dark Green	A/C Signal
46	Red/White	Fused B+
48	Brown/White	IAC Motor No. 3 Driver
49	Yellow/Black	IAC Motor No. 2 Driver
50	Black/Tan	Ground
51	Tan/White	Downstream O2 Sensor Signal
56 (3-Spd A/T)	Orange/Black	(1) TCC Solenoid Control
57	Gray/Red	IAC Motor No. 1 Driver
58	Violet/Black	IAC Motor No. 4 Driver
59	Violet/Brown	CCD Bus (+)
60	White/Black	CCD Bus (-)
61	Violet/White	5-Volt Supply
62	White/Pink	Brake Switch Sense
63 (2)	Yellow/Dark Green	Torque Management Request
64	Dark Blue/Orange	A/C Clutch Relay Control
65	Pink	SCI Transmit
66	White/Orange	Vehicle Speed Sensor Signal
67	Dark Blue/Yellow	Auto Shutdown Relay Control
73	Lt. Green/Dk. Blue	Radiator Fan Relay Control
74	Brown	Fuel Pump Relay Control
75	Light Green	SCI Receive
76	Black/White	Park/Neutral Switch Sense
78	Tan/Red	Speed Control Vacuum Solenoid Control
80	Light Green/Red	Speed Control Vent Solenoid Control
(1) TCC solenoid is Torque Converter Clutch solenoid. (2) Applies to models with 4-speed electronic controlled transaxle.

(1)	TCC solenoid is Torque Converter Clutch solenoid.

(2)	Applies to models with 4-speed electronic controlled transaxle.

PCM CONNECTOR TERMINAL IDENTIFICATION

Terminal	Wire Color	Function
1	Black	Ground
2	Light Green/Dark Blue	Rad Fan Relay Control
3	Dark Green	Rad Fan Relay Output
4	Gray	Fused B+

RADIATOR COOLING FAN RELAY CONNECTOR TERMINAL IDENTIFICATION

Terminal	Wire Color	Function
1	Tan/Red	S/C Vacuum Solenoid Control
2	Light Green/Red	S/C Vent Solenoid Control
3	Dark Blue/Red	S/C Brake Switch Output
4	Black	Ground

SPEED CONTROL SERVO CONNECTOR TERMINAL IDENTIFICATION

Scheme 71

Terminal	Wire Color	Function
1	Violet/White	5-Volt Supply
2	Orange/Dark Blue	Sensor Signal
3	Black/Light Blue	Sensor Ground

THROTTLE POSITION SENSOR CONNECTOR TERMINAL ID

Scheme 72

Terminal	Wire Color	Function
1	Light Green/Black	TRS T1 Sensor
3	Violet	TRS T3 Sensor
4	White/Black	CCD Bus (-)
5	N/A	Autostick Upshift Switch Sensor
6	Gray/Black	Crankshaft Position Sensor Signal
7	Pink	SCI Transmit
8	Yellow/Red	Ignition Switch Out (Start)
9	Orange/Black	OD Press Switch Sensor
10	Yellow/Dark Green	Torque Management Request Sensor
11	Red/White	Ignition Switch Out (Run/Stop)
12	Orange/Dark Blue	TP Sensor Signal
13	Dark Blue/Black	Speed Sensor Ground
14	Light Green/White	Output Speed Sensor Signal
15	Light Green	Transmission Relay Control
16	Red	Transmission Control Relay Output
17	Red	Transmission Control Relay Output
19	White	2-4 Solenoid Control
20	Light Blue	L-R Solenoid Control
41	Black/White	TRS T41 Sensor
42	Violet/White	TRS T42 Sensor
43	Violet/Brown	CCD Bus (+)
44	N/A	Autostick Downshift Switch Sensor
46	Pink/Light Blue	SCI Receive
47	Yellow/Black	2-4 Pressure Switch Sensor
49	N/A	OD Off Switch Sensor
50	Dark Green	L-R Pressure Switch Sensor
51	Black/Light Blue	Sensor Ground
52	Red/Black	InPut Speed Sensor Signal
53	Black/Yellow	Ground
54	Violet/Light Green	Transmission Temperature Sensor Signal
56	Red	Fused B(+)
57	Black/Red	Ground
58	White/Orange	VSS Signal
59	Pink	UD Solenoid Control
60	Brown	OD Soenoid Control

TRANSMISSION CONTROL MODULE CONNECTOR TERMINAL ID

Scheme 73

Terminal	Wire Color	Function
1	Not Used	Not Used
2	Orange/Black	TCC Solenoid Control
3	White/Black	Fused Ign. Switch Output

TORQUE CONVERTER CLUTCH SOLENOID CONNECTOR TERMINAL ID (3-SPEED A/T)

Scheme 74

Terminal	Wire Color	Function
1	White	Fused Ign. Switch Output
2	Not Used	Not Used
3	Dark Blue/Black	Speed Sensor Ground
4	Violet/Light Green	Trans. Temp. Sensor Signal
5	Black/White	C4 Sense To PCM
6	Violet/Black	Back-Up Lights
7	Light Green/Black	C4 Sense To TCM
8	Violet	C3 Sense To TCM
9	Violet/White	C2 Sense To TCM
10	Black/White	C1 Sense To TCM

TRANSMISSION RANGE SENSOR CONNECTOR TERMINAL ID (4-SPEED A/T)

Terminal	Wire Color	Function
1	Black	Heater Ground
2	Dark Green/Orange	Auto Shutdown Relay Output
3	Black/Light Blue	Sensor Ground
4	Black/Dark Green	Sensor Signal

UPSTREAM OXYGEN SENSOR CONNECTOR TERMINAL ID

Scheme 75

Terminal	Wire Color	Function
1	White/Orange	Sensor Signal
2	Black/Light Blue	Sensor Ground
3	Orange	8-Volt Supply

VEHICLE SPEED SENSOR CONNECTOR TERMINAL ID (3-SPEED A/T)

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

Note. Perform NTC-1A or NTC-3A before proceeding. Following test procedure is invalid if thermostat is stuck open, closed or removed.

Check thermostat operation. If thermostat operates correctly, go to next step. If thermostat does not operate correctly, replace thermostat. Perform TEST VER-2A.
Ensure ignition is on with engine off. Ensure engine coolant temperature is less than 160°F (71°C).
Using scan tool, read Engine Coolant Temperature (ECT) sensor value. Using temperature probe, check temperature on cylinder block, near engine coolant temperature sensor. Engine coolant temperature sensor is located near thermostat housing and contains a Black/Light Blue wire and Tan/Black wire in the connector.
If ECT sensor value on scan tool is not within 15°F (-9°C) of temperature reading on temperature probe, replace engine coolant temperature sensor. Perform TEST VER-2A. If ECT sensor value on scan tool is within 15°F (-9°C) of temperature reading on temperature probe, go to next step.
Start engine and warm engine until engine coolant temperature is greater than 180°F (82°C). Using temperature probe, check temperature on cylinder block, near engine coolant temperature sensor. Compare ECT sensor value on scan tool with temperature reading on temperature probe.
If ECT sensor value on scan tool does not stay within 15°F (-9°C) of temperature reading on temperature probe at all times, replace engine coolant temperature sensor. Perform TEST VER-2A. If ECT sensor value on scan tool stays within 15°F (-9°C) of temperature reading on temperature probe at all times, go to next step.
Operate engine until radiator fan operates or engine coolant temperature reaches 220°F (104°C). If cooling fan does not operate, repair cooling fan as necessary. See appropriate SPECIFICATIONS & ELECTRIC COOLING FANS article in the ENGINE COOLING section. If cooling fan operates, engine coolant temperature sensor and radiator fan are operating properly. Test is complete.

Engine Controls - Tests W/codes - 3.0L: Overview Dodge Caravan III