Engine Controls - Tests W/codes - 2.4L: Overview — Dodge Caravan III (1995-2000)

CONNECTOR IDENTIFICATION

Connector	See Fig. No.
A/C Pressure Sensor	3
Brake Switch	4
Camshaft Position Sensor	5
Crankshaft Position Sensor	6
Data Link Connector	7
Downstream Oxygen Sensor	8
EGR Solenoid	9
Engine Coolant Temperature Sensor	10
EVAP Purge Solenoid	11
Fuel Tank Module	12
Idle Air Control Motor	13
Ignition Coil	14
Injector	15
Intake Air Temperature Sensor	16
Knock Sensor	17
Leak Detection Pump	18
MAP Sensor	19
Output Speed Sensor 4-Speed A/T	20
Park/Neutral Switch 3-Speed A/T	21
Powertrain Control Module (PCM)	22
Radiator Cooling Fan Relay	23
Speed Control Servo	24
Throttle Position Sensor	25
Transmission Control Module 4-Speed A/T	26
Transmission Range Sensor 4-Speed A/T	27
Torque Converter Clutch Solenoid	28
Upstream Oxygen Sensor	39
Vehicle Speed Sensor 3-Speed A/T	30

CONNECTOR IDENTIFICATION DIRECTORY

Scheme 2

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 3

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 4

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

CAMSHAFT POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

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 5

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 6

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 7

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

EGR SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 8

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

ENGINE COOLANT TEMP. SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 9

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

EVAP PURGE SOLENOID CONNECTOR TERMINAL IDENTIFICATION

Scheme 10

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 11

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

Terminal	Wire Color	Function
1	Dark Blue/Tan	Ignition Coil No. 2 Driver
2	Dark Green/Orange	Auto Shutdown Relay Output
3	Gray	Ignition Coil No. 1 Driver

IGNITION COIL CONNECTOR TERMINAL IDENTIFICATION

Scheme 12

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

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

INTAKE AIR TEMP. SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 13

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

KNOCK SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 14

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 15

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

MAP SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 16

Scheme 16: OUTPUT SPEED SENSOR CONNECTOR TERMINAL IDENTIFICATION (4-SPEED A/T)

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

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

Scheme 17

Scheme 17: PARK/NEUTRAL SWITCH CONNECTOR TERMINAL IDENTIFICATION (3-SPEED A/T)

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 IDENTIFICATION (3-SPEED A/T)

Scheme 18

Scheme 18: POWERTRAIN CONTROL MODULE CONNECTOR IDENTIFICATION

Terminal No.	Wire Color	Function
3	Dark Blue/Tan	Ign. Coil Driver No. 2
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
8	(1)	Starter Relay Control
10	Black/Tan	Ground
11	Gray	Ign. Coil Driver No. 1
13	White/Dark Blue	Injector No. 1 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
24	Dk. Blue/Lt. Green	Knock Sensor Signal
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
37	Black/Red	Intake Air Temp. Sensor
40	Gray/Yellow	EGR Solenoid Control
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 (2)	Orange/Black	(3) 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 (4)	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
68	Pink/Black	EVAP Purge Solenoid Control
72	Yellow/Black	Leak Detection Pump Sense
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
77	White/Dark Green	Leak Detection Pump Control
78	Tan/Red	Speed Control Vacuum Solenoid Control
80	Light Green/Red	Speed Control Vent Solenoid Control
(1) A Tan wire is used on 4-speed models and a Dark Blue/Orange wire is used on 3-speed models. (2) With 3-speed A/T. (3) TCC solenoid is torque converter clutch solenoid. (4) Applies to models with 4-speed electronic controlled transaxle.

(1)	A Tan wire is used on 4-speed models and a Dark Blue/Orange wire is used on 3-speed models.

(2)	With 3-speed A/T.

(3)	TCC solenoid is torque converter clutch solenoid.

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

PCM CONNECTOR TERMINAL IDENTIFICATION

RADIATOR COOLING FAN RELAY 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

SPEED CONTROL SERVO 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 19

Scheme 19: THROTTLE POSITION SENSOR CONNECTOR TERMINAL IDENTIFICATION

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 IDENTIFICATION

Scheme 20

Scheme 20: TRANSMISSION CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATION (4-SPEED A/T)

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 IDENTIFICATION

Scheme 21

Scheme 21: TRANSMISSION RANGE SENSOR CONNECTOR TERMINAL IDENTIFICATION (4-SPEED A/T)

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 IDENTIFICATION (4-SPEED A/T)

Scheme 22

Scheme 22: TORQUE CONVERTER CLUTCH SOLENOID CONNECTOR TERMINAL IDENTIFICATION (3-SPEED A/T)

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 IDENTIFICATION (3-SPEED A/T)

UPSTREAM OXYGEN SENSOR CONNECTOR TERMINAL IDENTIFICATION

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 IDENTIFICATION

Scheme 23

Scheme 23: VEHICLE SPEED SENSOR CONNECTOR TERMINAL IDENTIFICATION (WITH 3-SPEED A/T)

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 IDENTIFICATION (WITH 3-SPEED A/T)

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

Note. When using MIL to retrieve DTCs, some DTCs have more than one meaning. The MIL is unable to distinguish between different failures for a specified component. For example, there are 4 different possible failures for the downstream oxygen sensor system, but the MIL can only identify an downstream oxygen sensor failure by flashing a DTC 21. See DTC MESSAGES & CODES table.

Note. If using Chrysler's Diagnostic Readout Box (DRB-III) scan tool, scan tool has ability to display all Diagnostic Trouble Codes (DTCs). Generic scan tool and/or MIL can also be used, but has limited diagnostic capability. Generic scan tool is not be able to identify all possible DTCs. As an example, generic scan tool may not be able to identify or display a DTC for a malfunctioning A/C clutch relay circuit, A/C pressure sensor, Auto Shutdown (ASD) relay circuit, charging system voltage circuit or knock sensor circuit. See DTC MESSAGES & CODES table.

DRB-III Scan Tool Message	Generic Scan Tool Code	MIL Code	Test No.
5-VOLT SUPPLY OUTPUT TOO LOW	P1496	71	TC-146A
A/C CLUTCH RELAY CIRCUIT	N/A	33	TC-16A
A/C PRESSURE SENSOR VOLTS TOO HIGH	N/A	33	TC-90A
A/C PRESSURE SENSOR VOLTS TOO LOW	N/A	33	TC-91A
AUTO SHUTDOWN RELAY CONTROL CIRCUIT	N/A	42	TC-10A
BAROMETRIC PRESSURE OUT OF RANGE	P0106	61	TC-60A
BATTERY TEMP SENSOR VOLTAGE TOO HIGH	P1492	44	TC-153A
BATTERY TEMP SENSOR VOLTAGE TOO LOW	P1493	44	TC-153A
BRAKE SWITCH STUCK PRESSED OR RELEASED	P0703	65	TC-152A
CATALYTIC CONVERTER EFFICIENCY FAILURE	P0420	64	TC-112A
CHARGING SYSTEM VOLTAGE TOO HIGH	N/A	46	TC-6A
CHARGING SYSTEM VOLTAGE TOO LOW	N/A	47	TC-5A
CLOSED LOOP TEMPERATURE NOT REACHED	P0125	17	TC-128A
CYLINDER #1 MISFIRE	P0301	43	TC-107A
CYLINDER #2 MISFIRE	P0302	43	TC-107A
CYLINDER #3 MISFIRE	P0303	43	TC-107A
CYLINDER #4 MISFIRE	P0304	43	TC-107A
CYLINDER #5 MISFIRE	P0305	43	TC-107A
CYLINDER #6 MISFIRE	P0306	43	TC-107A
DOWNSTREAM O2 SENSOR HEATER FAILURE	P0141	21	TC-105A
DOWNSTREAM O2 SENSOR SHORTED TO VOLTAGE	P0138	21	TC-126A
DOWNSTREAM O2 SENSOR STAYS AT CENTER	P0140	21	TC-129A
DOWNSTREAM O2S VOLTAGE SHORTED TO GROUND	P0137	21	TC-156A
EATX CONTROLLER DTC PRESENT	P0700	45	(1)
ECT SENSOR VOLTAGE TOO HIGH	P0118	22	TC-31A
ECT SENSOR VOLTAGE TOO LOW	P0117	22	TC-30A
ENGINE IS COLD TOO LONG	N/A	17	(2)
EVAP PURGE FLOW MONITOR FAILURE	P0441	31	TC-113A
EVAP PURGE SOLENOID CIRCUIT	P0443	31	TC-18A
EVAP SYSTEM GROSS LEAK	P0455	31	TC-161A
EVAP LEAK MONITOR PINCHED HOSE	P1486	31	TC-187A
EVAP SYSTEM SMALL LEAK	P0442	31	TC-160A
FUEL LEVEL SENDING UNIT VOLTS TOO HIGH	N/A	42	(3)
FUEL LEVEL SENDING UNIT VOLTS TOO LOW	N/A	42	(3)
FUEL LEVEL SENDING UNIT NO CHANGE OVER MILES	N/A	42	(3)
FUEL PUMP RELAY CONTROL CIRCUIT	N/A	42	TC-101A
FUEL SYSTEM LEAN	P0171	51	TC-119A
FUEL SYSTEM RICH	P0172	52	TC-118A
GENERATOR FIELD NOT SWITCHING PROPERLY	N/A	41	TC-11A
IDLE AIR CONTROL MOTOR CIRCUITS	P0505	25	TC-25A
IGNITION COIL #1 PRIMARY CIRCUIT	P0351	43	TC-43A
IGNITION COIL #2 PRIMARY CIRCUIT	P0352	43	TC-43A
INJECTOR #1 CONTROL CIRCUIT	P0201	27	TC-21A
INJECTOR #2 CONTROL CIRCUIT	P0202	27	TC-21A
INJECTOR #3 CONTROL CIRCUIT	P0203	27	TC-21A
INJECTOR #4 CONTROL CIRCUIT	P0204	27	TC-21A
INJECTOR #5 CONTROL CIRCUIT	P0205	27	TC-21A
INJECTOR #6 CONTROL CIRCUIT	P0206	27	TC-21A
INTAKE AIR TEMP SENSOR VOLTAGE HIGH	P0113	23	TC-58A
INTAKE AIR TEMP SENSOR VOLTAGE LOW	P0112	23	TC-57A
INTERMITTENT LOSS OF CMP OR CKP	P1391	11	TC-157A
INTERNAL CONTROLLER FAILURE	P0601	53	(4)
KNOCK SENSOR CIRCUIT	N/A	16	TC-59A
LEAK DETECTION PUMP PRESSURE SWITCH	P1494	31	TC-184A
LEAK DETECTION PUMP SOLENOID CIRCUIT	P1495	31	TC-183A
MAP SENSOR VOLTAGE TOO HIGH	P0108	14	TC-37A
MAP SENSOR VOLTAGE TOO LOW	P0107	14	TC-36A
MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT	P1398	11	TC-186A
MULTIPLE CYLINDER MISFIRE	P0300	43	TC-106A
NO ASD RELAY OUTPUT VOLTAGE AT PCM	N/A	42	TC-44A
NO CAM SIGNAL AT PCM	P0340	54	TC-1A
NO CCD MESSAGE FROM BODY CONTROL MODULE	P1695	66	TC-97A
NO CCD MESSAGES FROM TCM	P1698	66	TC-96A
NO CHANGE IN MAP FROM START TO RUN	P1297	13	TC-39A
NO CRANK REFERENCE SIGNAL AT PCM	N/A	11	TC-40A
NO VEHICLE SPEED SENSOR SIGNAL	P0500	15	TC-35A
PARK/NEUTRAL SWITCH FAILURE	P1899	37	TC-114A
PCM FAILURE EEPROM WRITE DENIED	P1696	63	TC-48A
PCM FAILURE SPI COMMUNICATIONS	P0600	53	(4)
PCM FAILURE SRI MILE NOT STORED	P1697	62	TC-48A
RAD FAN CONTROL RELAY CIRCUIT	P1491	35	TC-14A
SLOW UPSTREAM O2 DURING CATALYST MONITOR	P0133	21	TC-192A
SPEED CONTROL SOLENOID CIRCUITS	N/A	34	TC-15A
TARGET IDLE NOT REACHED	P1294	25	TC-138A
THROTTLE POSITION SENSOR VOLTAGE HIGH	P0123	24	TC-27A
THROTTLE POSITION SENSOR VOLTAGE LOW	P0122	24	TC-26A
TPS VOLTAGE DOES NOT AGREE WITH MAP	P0121	24	TC-132A
UPSTREAM O2 SENSOR HEATER FAILURE	P0135	21	TC-103A
UPSTREAM O2 SENSOR SHORTED TO VOLTAGE	P0132	21	TC-62A
UPSTREAM O2 SENSOR SLOW RESPONSE	P0133	21	TC-102A
UPSTREAM O2 SENSOR STAYS AT CENTER	P0134	21	TC-32A
UPSTREAM O2S VOLTAGE SHORTED TO GROUND	P0131	21	TC-155A
(1) Refer to appropriate AUTOMATIC TRANSAXLE article in appropriate section. For diagnosis of electronic controlled transaxle. (2) Check cooling system and thermostat if engine coolant temperature does not reach 176°F (80°C) after driving 20 minutes. (3) See appropriate BODY CONTROL COMPUTER TESTS article in ACCESSORIES & EQUIPMENT section. (4) Replace Powertrain Control Module (PCM). Perform TEST VER-2A.

(1)	Refer to appropriate AUTOMATIC TRANSAXLE article in appropriate section. For diagnosis of electronic controlled transaxle.

(2)	Check cooling system and thermostat if engine coolant temperature does not reach 176°F (80°C) after driving 20 minutes.

(3)	See appropriate BODY CONTROL COMPUTER TESTS article in ACCESSORIES & EQUIPMENT section.

(4)	Replace Powertrain Control Module (PCM). Perform TEST VER-2A.

DTC MESSAGES & CODES

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 - 2.4L: Overview Dodge Caravan III

CONNECTOR IDENTIFICATION

Scheme 2

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Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

Scheme 18

RADIATOR COOLING FAN RELAY CONNECTOR TERMINAL IDENTIFICATION

SPEED CONTROL SERVO CONNECTOR TERMINAL IDENTIFICATION

Scheme 19

Scheme 20

Scheme 21

Scheme 22

UPSTREAM OXYGEN SENSOR CONNECTOR TERMINAL IDENTIFICATION

Scheme 23

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

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

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