Engine Controls Self-Diagnostics: Diagnosis Dodge Dakota II

SELF-DIAGNOSTIC SYSTEM

Note. Diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRBIII®) scan tool. A generic scan tool may not be capable of performing all necessary test functions.

ON-BOARD DIAGNOSTICS

Note. Malfunction Indicator Light (MIL) may also be referred to as CHECK ENGINE light.

MIL is located on instrument cluster, just below the tachometer and is displayed as an engine icon. When ignition is first turned on, MIL should come on and remain on for 2 seconds to verify bulb and circuit operation, and then go off.

Note. If MIL does not come on and remain on for 2 seconds and then go off when ignition is first turned on, check instrument cluster for diagnosis of MIL. See ANALOG INSTRUMENT PANELS - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.

The Powertrain Control Module (PCM) monitors several different engine control system circuits. If malfunction occurs which affects vehicle emissions, a Diagnostic Trouble Code (DTC) will be set in PCM and PCM enters limp-in mode. In limp-in mode, PCM substitutes values for failed component and provides continuous engine operation. When DTC is set in PCM, the PCM will turn on MIL and MIL will remain on steady. In some instances, the MIL is turned on when the failure exists and DTC was set. These instances are referred to as one trip DTC. In many instances, the emission system must fail more then once before the PCM will turn on the MIL. These are referred to as a 2 trip DTC. For additional information for trip definition, see TRIP DEFINITION . If problem exists which does not affect vehicle emissions, a DTC will be set in PCM but MIL will not be turned on. OBD-II related DTCs are entered in PCM according to individual priority. The DTC priority determines when MIL is turned on and DTC self-erasure. For additional information for DTC priority and DTC self-erasure, see DTC PRIORITY & DTC SELF-ERASURE . Non-emission related DTCs have no priority in which they are entered in the PCM.

PCM might not store a DTC for a monitored circuit even though a malfunction has occurred. This may happen because one of the criteria for DTC has not been met. For example, assume criteria for DTC requires PCM to monitor a specified sensor output circuit only when engine operates between 750 RPM and 2000 RPM. If the sensor output circuit becomes shorted to ground when engine is operating at 2400 RPM, DTC will not be set, as short to ground occurred at 2400 RPM which exceeds the limit when PCM monitors the circuit.

If PCM detects active engine misfire severe enough to cause catalytic converter damage, MIL will flash to warn the driver of possible damage and DTC will be set.

The PCM will turn off MIL when malfunction is not detected during 3 consecutive trips on all applications except an engine misfire monitor or fuel system monitor. For additional information on engine misfire monitor and fuel system monitor, see MONITORED CIRCUITS . The PCM will turn off MIL when malfunction is not detected during 3 engine misfire or fuel system monitor tests. The PCM performs engine misfire or fuel system monitor tests when engine is operating within 375 RPM and within 10 percent of the load of operating condition at which first malfunction was detected.

DTCs may be retrieved for system diagnosis. See RETRIEVING DIAGNOSTIC TROUBLE CODES . System malfunctions are identified as either hard failures or intermittent failures. For additional information on hard failures or intermittent failures, see HARD FAILURES and INTERMITTENT FAILURES .

DTC Priority & DTC Self-Erasure

With OBD-II, different OBD-II related DTCs have different priorities according to regulations. The DTC priority determines when MIL will be turned on and DTC is erased or cleared from PCM. DTCs having a high priority will overwrite the lower priority DTCs. DTC priorities and description are as listed.

1. Priority "0" - This is a non-emissions related DTC.
2. Priority "1" - One trip failure of a 2 trip DTC for non-fuel system and non-misfire conditions.
3. Priority "2" - One trip failure of a 2 trip DTC for fuel system rich or fuel system lean condition, or misfire condition.
4. Priority "3" - Second trip failure for non-fuel system or non-misfire condition, or a one trip failure.
5. Priority "4" - Second trip failure for fuel system rich or fuel system lean and misfire condition, or a one trip catalyst damaging misfire.

One trip failures on a 2 trip DTC have low priority and 2 trip failures have higher priority. One and 2 trip failures for fuel system monitor and misfire monitor take precedence over non-fuel system and non-misfire failures. Non-emission related DTCs have no priority in which they are entered in the PCM.

After 3 good trips, PCM will turn off the MIL. Once MIL is turned off, trip counter is switched to a warm-up counter. PCM must not detect the recent malfunction during 40 warm-up cycles. A warm-up cycle is defined as the engine is started, an increase of 40°F (4°C) in engine coolant temperature exists after engine is started and engine coolant temperature reaches at least 160°F (71°C). After 40 warm-up cycles with no malfunction, PCM will clear DTC from PCM. DTCs may be cleared from PCM using scan tool, but this will erase or clear OBD-II monitor data such as counter information, warm-up cycles, trips and freeze frame data.

DIAGNOSTIC PROCEDURE

If no faults were found while performing basic diagnostic procedures, proceed with self-diagnostics. Always perform a visual inspection before attempting to diagnose engine control system problems. See VISUAL INSPECTION . Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES .

VISUAL INSPECTION

Most driveability problems in the engine control system result from faulty wiring, poor electrical connections, improper wire routing or leaking air and vacuum hose connections. Inspect all engine control system components, hoses, connectors and wiring for damage before proceeding with system testing.

RETRIEVING DIAGNOSTIC TROUBLE CODES

Note. If using a generic scan tool or using DRBIII scan tool in generic scan tool mode, Powertrain Control Module (PCM) may stop communications with scan tool. This applies to vehicles with a build date prior to 11-30-99. It may appear that sensor values are not updating on generic scan tool. This condition may occur at any time during communications between PCM and generic scan tool. If this condition occurs, see technical service bulletin No. 08-39-99 for recommended repair procedure.

Note. Ensure battery is fully charged before retrieving diagnostic trouble codes.

Scheme 34

1. Ensure ignition off. Connect scan tool to Data Link Connector (DLC). DLC is located below driver's side of instrument panel. (Scheme 34)
2. Turn ignition on with engine off. Using scan tool manufacturer's instructions, read and record Diagnostic Trouble Code (DTC) message (DRB scan tool) or DTC code (generic scan tool). On any scan tool, if scan tool displays NO RESPONSE and engine does not start, perform «TEST NS-3: ENGINE DOES NOT START & SCAN TOOL DISPLAYS NO RESPONSE»(ref-9379-S02419182072000102000000) which is located after No Trouble Code (NTC) tests following DTC tests under DIAGNOSTIC TESTS. If engine starts and scan tool displays NO RESPONSE FROM PCM (CCD), see NO RESPONSE: POWERTRAIN CONTROL MODULE (PCM) test under COMMUNICATIONS under SYSTEM TESTS in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT. If scan tool will not power up, check for loose cable connections or bad cable. If cable connections or cable are defective, repair or replace components as necessary and then recheck for DTCs. If cable connections and cable are okay, using voltmeter, check voltage at cavity No. 16 (Pink wire) on DLC. Voltage should be at least 11 volts. If voltage is not as specified, check for defective fuse No. 12 (15-amp), as this fuse supplies voltage from battery to cavity No. 16 on data link connector. Fuse No. 12 is located in junction block on end of driver's side of instrument panel, near door opening. If necessary, check wiring between fuse No. 12 and the battery. See DATA LINK CONNECTORS and POWER DISTRIBUTION articles in WIRING DIAGRAMS. If voltage exists at cavity No. 16 (Pink wire) on DLC but scan tool will not power up and blank screen exists, the ground circuits for DLC should be checked. Using ohmmeter, check resistance between ground and terminals No. 4 (Black/Red wire) and No. 5 (Black/Tan wire) on DLC. If resistance is less than 5 ohms, ground circuit is okay and it may be necessary to try another scan tool or cable. If resistance is 5 ohms or more, open exists on ground circuit. For ground circuit wiring, see GROUND DISTRIBUTION article in WIRING DIAGRAMS.
3. Note DTC messages and codes. See «DIAGNOSTIC TROUBLE CODE DEFINITIONS»(ref-9379-S36496918152000102000000).
4. If scan tool displays an error message, (i.e., USER-REQUESTED COLD BOOT or USER-REQUESTED WARM BOOT), follow scan tool manufacturer's instructions. If scan tool displays a bus failure, this indicates either a scan tool failure or bus failure. To diagnose and correct bus failures, see COMMUNICATIONS under SYSTEM TESTS in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.
5. Perform appropriate test for displayed DTCs. See appropriate DTC test listed under «DIAGNOSTIC TESTS»(ref-9379-S25851633692000102000000). Once all repairs are made, ensure DTCs are cleared from PCM. See «CLEARING DIAGNOSTIC TROUBLE CODES»(ref-9379-S13078994412000102000000) under SELF-DIAGNOSTIC SYSTEM.
6. If no DTCs are displayed, refer to one of the following: For driveability problems, perform «TEST NTC-1: NO TROUBLE CODE TEST MENU»(ref-9379-S41073391422000102000000) located after DTC tests under DIAGNOSTIC TESTS. For no-start problems, perform «TEST NS-SEL: NO START TEST SELECTION»(ref-9379-S41408472742000102000000) which is located after No Trouble Code (NTC) tests following DTC tests under DIAGNOSTIC TESTS. For speed control problems and additional servicing information, see appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT. For charging system problems and additional servicing information, see appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.

Note. If MIL remains on steady and no DTCs exist, check instrument cluster for diagnosis of MIL. See ANALOG INSTRUMENT PANELS - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.

CLEARING DIAGNOSTIC TROUBLE CODES

Connect scan tool to Data Link Connector (DLC). DLC is located below driver's side of instrument panel. (Scheme 34) Turn ignition on with engine off. Using screen prompts on scan tool, clear DTC from PCM. DTCs may be cleared from PCM does not detect the recent malfunction during 40 warm-up cycles. For additional information, see DTC PRIORITY & DTC SELF-ERASURE.

DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC MESSAGES & CODES

DIAGNOSTIC TESTS

Note. Tests are arranged with Diagnostic Trouble Code (DTC) tests followed by No Trouble Code (NTC) tests, No Start (NS) tests and concluding with Verification (VER) tests.

Note. When Powertrain Control Module (PCM) is replaced, PCM must be reprogrammed. For PCM programming, see POWERTRAIN CONTROL MODULE PROGRAMMING under PROGRAMMING.

Note. On 4.7L, if Transmission Control Module (TCM) is replaced, perform shift quality quick learn procedure. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION.

Note. Self-diagnostic tests are written specifically for Chrysler's Diagnostic Readout Box (DRBIII®) scan tool, which will be referred to as DRB during testing procedures. A generic scan tool may not be capable of performing all necessary test functions.

Note. Powertrain Control Module (PCM) is located at passenger's side front corner of engine compartment on inner fender panel and uses three 32-pin connectors which are referred to as connectors C1, C2 and C3. see scheme 2

Note. Before diagnosing an engine performance problem, refer to SERVICE PRECAUTIONS under SELF-DIAGNOSTIC SYSTEM before proceeding.

Note. If using a generic scan tool or using DRBIII scan tool in generic scan tool mode, Powertrain Control Module (PCM) may stop communications with scan tool. This applies to vehicles with a build date prior to 11-30-99. It may appear that sensor values are not updating on generic scan tool. This condition may occur at any time during communications between PCM and generic scan tool. If this condition occurs, see technical service bulletin No. 08-39-99 for recommended repair procedure.

TEST NTC-1: NO TROUBLE CODE TEST MENU

1. No Trouble Code (NTC) tests may be performed if a driveability problem or charging system problem exists. Select symptom which most accurately describes driveability problem and determine which NTC test should be performed pertaining to the symptom and the order that NTC tests should be performed. See «NO TROUBLE CODE SYMPTOM»(ref-9379-S08519660102000102000000) table. Go to next step.
2. Perform appropriate NTC test. See «NO TROUBLE CODE TEST MENU»(ref-9379-S38444381142000102000000) table for NTC test definitions and location. NO TROUBLE CODE SYMPTOM Application Perform NTC Tests In This Order Hard Start 19, 9, 11, 7, 20, 14, 12, 8, 10 & 13 Start & Stalls 19, 16, 11, 7, 20, 14 & 12 Hesitation/Sag/Stumble 19, 16, 9, 11, 7, 20, 14, 12, 8, 10, 13 & 17 Surge 19, 16, 11, 7, 20, 14, 12 & 10 Lack Of Power/Sluggish 19, 16, 11, 7, 20, 14 & 12 Spark Knock/Detonation 19, 16, 11, 7, 20, 14 & 12 Cuts Out/Misses 19, 16, 11, 7, 20 & 12 Backfire 19, 16, 11 & 14 Runs Rough/Unstable Idle/Erratic Idle 19, 16, 9, 11, 7, 20, 14, 13, 8, 10 13 & 17 Poor Fuel Economy 19, 16, 9, 11, 7, 20, 14, 13, 8, 10 13 & 17 NO TROUBLE CODE TEST MENU Application Perform This Test No Response From TCM (4.7L Only) «NTC-2»(ref-9379-S15771809212000102000000) Checking A/C System «NTC-3»(ref-9379-S40543567872000102000000) Checking Ambient/Battery Temperature Sensor «NTC-4»(ref-9379-S22332430742000102000000) Checking Brake Switch «NTC-5»(ref-9379-S23133794892000102000000) Checking Charging System «NTC-6»(ref-9379-S06423888432000102000000) Checking Engine Coolant Temperature (ECT) Sensor Calibration «NTC-7»(ref-9379-S16197435552000102000000) Checking Engine Mechanical Systems «NTC-8»(ref-9379-S07165603922000102000000) Checking Engine Vacuum «NTC-9»(ref-9379-S00482677622000110200000) Checking Evaporation Emission System «NTC-10»(ref-9379-S33212870552000102000000) Checking Fuel Delivery «NTC-11»(ref-9379-S21277222602000102000000) Checking IAC Motor Operation «NTC-12»(ref-9379-S19852510752000110200000) Checking Intake Air Temperature (IAT) Sensor «NTC-13»(ref-9379-S32860953382000102000000) Checking Manifold Absolute Pressure (MAP) Sensor Calibration «NTC-14»(ref-9379-S42503598882000102000000) Checking Oil Pressure Sensor «NTC-15»(ref-9379-S03396950262000102000000) Checking PCM Power & Ground Circuits «NTC-16»(ref-9379-S14701535962000102000000) Checking Park/Neutral Switch «NTC-17»(ref-9379-S13923833862000102000000) Checking Radiator Fan Operation «NTC-18»(ref-9379-S12225112892000110200000) Checking Secondary Ignition «NTC-19»(ref-9379-S35736785062000110200000) Checking Throttle Position (TP) Sensor Calibration «NTC-20»(ref-9379-S21518262122000102000000)

TEST NTC-2: NO RESPONSE FROM TCM (4.7L ONLY)

Note. Test applies only to 4.7L. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition off. Disconnect TCM harness connector. TCM is bolted to front of radiator core support at passenger's side front corner of engine compartment. see scheme 38 Using a test light connected to ground, probe fused B+ circuit terminal No. 56 (Yellow/White wire) at TCM harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open Yellow/White wire between TCM and Power Distribution Center (PDC). Perform «TEST VER-9»(ref-9379-S07299034102000111300000).
2. Turn ignition off. Using test light connected to battery positive terminal, probe all 3 Black/Red wire ground circuits, terminals No. 37, 39 and 57 at TCM harness connector. If test light illuminates at all circuits, go to next step. If test light does not illuminate at all circuits, repair appropriate Black/Red wire. Perform «TEST VER-9»(ref-9379-S07299034102000111300000).
3. Turn ignition on. Using test light connected to ground, probe fused ignition switch output (ST/RUN/OFF) circuit, terminal No. 11 (Dark Green/Red wire) at TCM harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open Dark Green/Red wire between TCM and PRNDL switch or instrument cluster. PRNDL switch is located on left side of transmission. Perform «TEST VER-9»(ref-9379-S07299034102000111300000).
4. Turn ignition off. Remove starter relay from Power Distribution Center (PDC). see scheme 3 Turn ignition to START position. Using test light connected to ground, probe fused ignition switch output (START) circuit terminal No. 8 (Dark Blue/Yellow wire) at TCM harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open Dark Blue/Yellow wire between TCM and ignition switch. Perform «TEST VER-9»(ref-9379-S07299034102000111300000).
5. Turn ignition on. Connect jumper wire between ground and CCD (+) circuit, terminal No. 43 (Violet/Brown wire). Using scan tool, perform CCD BUS test. If scan tool displays SHORT TO GROUND, go to next step. If scan tool does not display SHORT TO GROUND, repair open Violet/Brown wire between PCM and TCM. Perform «TEST VER-9»(ref-9379-S07299034102000111300000).
6. Move jumper wire from CCD (+) circuit, terminal No. 43 (Violet/Brown wire) to CCD (-) circuit, terminal No. 4 (White/Black wire). Using scan tool, perform CCD BUS test. If scan tool displays SHORT TO GROUND, replace TCM. Perform «TEST VER-9»(ref-9379-S07299034102000111300000). If scan tool does not display SHORT TO GROUND, repair open White/Black wire between PCM and TCM. Perform «TEST VER-9»(ref-9379-S07299034102000111300000).

TEST NTC-3: CHECKING A/C SYSTEM

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC P0645: A/C CLUTCH RELAY CIRCUIT does not exist, go to next step. If DTC P0645: A/C CLUTCH RELAY CIRCUIT exists, perform «DTC P0645: A/C CLUTCH RELAY CIRCUIT»(ref-9379-S29062748072000102000000) test.
2. Ensure A/C system is properly charged. If A/C system is properly charged, go to next step. If A/C system is not properly charged, recharge A/C system as necessary. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
3. Turn ignition on with engine off. Using scan tool, monitor A/C SELECT state. Turn A/C switch to ON and OFF positions several times while noting A/C SELECT state. If A/C SELECT state changes, go to next step. If A/C SELECT state does not change, repair open on A/C select circuit. A/C select circuit is the Light Green/White wire that goes from terminal No. 23 on Powertrain Control Module (PCM) connector C3 to terminal No. 2 on A/C heater control assembly. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
4. Check operation of clutch cycling switch. See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. Clutch cycling switch may also be referred to as A/C cycling switch. If clutch cycling switch operates properly, go to next step. If cycling switch does not operate properly, replace cycling switch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
5. Turn ignition on with engine off. Turn A/C switch to ON position and place A/C fan switch in HIGH position while using scan tool to monitor A/C REQUEST state. If A/C REQUEST state changes, go to next step. If A/C REQUEST state does not change, go to step 12.
6. Turn ignition off. Check operation of high pressure cut-off switch. See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. High pressure cut-off switch may also be referred to as high pressure cut-out switch or A/C high pressure switch. If high pressure cut-off switch operates properly, go to next step. If high pressure cut-off switch does not operate properly, replace high pressure cut-off switch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
7. Check operation of low pressure cut-off switch. See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. Low pressure cut-off switch may also be referred to as low pressure cut-out switch or A/C low pressure switch. If low pressure cut-off switch operates properly, go to next step. If low pressure cut-off switch does not operate properly, replace low pressure cut-off switch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
8. Ensure ignition is off. Disconnect A/C clutch connector at A/C compressor. Using ohmmeter, check resistance between ground and terminal No. 2 (Black wire) on A/C clutch connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on Black wire between A/C clutch connector and ground connection. Ground connection is located in engine compartment on the firewall, just directly below windshield wiper motor assembly. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
9. Ensure ignition is off and A/C clutch connector is still disconnected at A/C compressor. Remove A/C clutch relay from power distribution center. see scheme 3 Power distribution center is located at driver's side of engine compartment, near battery. Note cavities in power distribution center for A/C clutch relay. Using ohmmeter, check resistance between cavity No. 87 (Dark Blue/Black wire) in power distribution center for A/C clutch relay and terminal No. 1 (Dark Blue/Black wire) on A/C clutch connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on Dark Blue/Black wire between A/C clutch connector and cavity No. 87 in power distribution center for A/C clutch relay. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
10. Ensure A/C clutch relay is still removed from power distribution center. Using voltmeter, check voltage at cavity No. 30 (Violet wire) in power distribution center for A/C clutch relay. see scheme 3 If voltage is more than 11 volts, go to next step. If voltage is 11 volts or less, repair open between battery, fuse No. 4 (20-amp) and Violet wire between fuse No. 4 and cavity No. 30 in power distribution center for A/C clutch relay. Fuse No. 4 is located in fuse block on end of driver's side of instrument panel, near door opening. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
11. Ensure ignition is off. Reinstall A/C clutch relay. Turn ignition on with engine off. Using scan tool, actuate A/C clutch relay. Using voltmeter, check voltage at terminal No. 1 (Dark Blue/Black wire) on A/C clutch connector. If voltage does not fluctuate between zero volts and 11 volts, replace A/C clutch relay. Perform «TEST VER-2»(ref-9379-S22462118962000102000000). If voltage fluctuates between zero volts and 11 volts, replace electrical coil on A/C compressor for A/C clutch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
12. Turn ignition off. Check operation of high pressure cut-off switch. See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. High pressure cut-off switch may also be referred to as high pressure cut-out switch or A/C high pressure switch. If high pressure cut-off switch operates properly, go to next step. If high pressure cut-off switch does not operate properly, replace high pressure cut-off switch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
13. Check operation of low pressure cut-off switch. See appropriate A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING. Low pressure cut-off switch may also be referred to as low pressure cut-out switch or A/C low pressure switch. If low pressure cut-off switch operates properly, it is assumed that an open exists on A/C request circuit. A/C request circuit is the Dark Blue wire that goes from terminal No. 22 on PCM connector C3 to terminal No. 1 on low pressure cut-off switch and then to high pressure cut-off switch and then from high pressure cut-off switch to clutch cycling switch, and to terminal No. 2 on A/C heater control assembly. A/C request circuit may also be referred to as A/C pressure signal. Repair open on A/C request circuit. Perform «TEST VER-2»(ref-9379-S22462118962000102000000). If low pressure cut-off switch does not operate properly, replace low pressure cut-off switch. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).

TEST NTC-4: CHECKING AMBIENT/BATTERY TEMPERATURE SENSOR

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool in SENSORS, read AMBIENT/BAT TMP DEG. Using thermometer, measure underhood temperature near Battery Temperature Sensor (BTC) at battery tray. BTS is located on battery tray, below battery and contains a 2-pin connector with Black/Light Blue and Pink/Yellow wires. If underhood temperature is within 10 degrees of AMBIENT/BAT TMP DEG, go to next step. If underhood temperature is within 10 degrees of AMBIENT/BAT TMP DEG, replace BTS. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
2. Turn ignition off. Inspect wiring harness and connectors between battery temperature sensor and Powertrain Control Module (PCM). PCM is located at passenger's side front corner of engine compartment on inner fender panel. Inspect battery temperature sensor connector and PCM connectors for corroded, pushed out, miswired or damaged terminals. Also, check for related Technical Service Bulletins (TSBs). If no problems and no related TSBs exist, go to next step. If any problems exist, repair wiring or connectors as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
3. Start engine and allow engine to idle. Wiggle wiring harness and connectors between PCM and BTS. If no problems are found, test is complete. If any problems are found while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .

TEST NTC-5: CHECKING BRAKE SWITCH

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool in INPUTS/OUTPUTS mode, read brake switch state while depressing and releasing brake pedal several times. If scan tool does not display PRESSED and released, go to next step. If scan tool displays PRESSED and released, brake switch is operating properly. Test is complete.
2. Turn ignition off. Disconnect brake switch connector. Brake switch is located near top of brake pedal. Using ohmmeter, check resistance between ground and terminal No. 5 (Black wire) on brake switch connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on Black wire between brake switch and ground connection. Ground connection is located directly below brake booster, on the firewall. Perform «TEST VER-4»(ref-9379-S33209088462000102000000).
3. Ensure ignition is off and brake switch connector is still disconnected. Disconnect Powertrain Control Module (PCM) connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Using ohmmeter, check resistance between terminal No. 6 (White/Pink wire) on brake switch connector and terminal No. 24 (White/Pink wire) on PCM connector C3. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on White/Pink wire between brake switch and PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
4. Ensure brake switch connector and PCM connectors are still disconnected. Disconnect 14-pin connector at CAB module. CAB module is located near battery at driver's side front corner of engine compartment. see scheme 47 On models with 4-wheel anti-lock brakes which may be referred to as Electronic Brake Control (EBC) 325, there are 2 connectors at CAB module. Connector C1 is a 14-pin connector and connector C2 is a 4-pin connector. On models with rear wheel anti-lock brakes which may be referred to as EBC 2, there is only one 14-pin connector at CAB module. Using ohmmeter, check resistance between ground and terminal No. 24 (White/Pink wire) on PCM connector C3. If resistance is 5 ohms or more, reinstall PCM connectors, CAB module connector and go to next step. If resistance is less than 5 ohms, repair short to ground on White/Pink wire between brake switch, CAB module and PCM. Perform «TEST VER-4»(ref-9379-S33209088462000102000000).
5. Using ohmmeter, check resistance between electrical terminals on brake switch that correspond with terminals No. 5 (Black wire) and No. 6 (White/Pink wire) on brake switch connector while depressing and releasing brake pedal. If resistance changes from less than 5 ohms to an open circuit, replace PCM. Perform «TEST VER-4»(ref-9379-S33209088462000102000000). If resistance does not change from less than 5 ohms to an open circuit, replace brake switch. Perform «TEST VER-4»(ref-9379-S33209088462000102000000).

TEST NTC-6: CHECKING CHARGING SYSTEM

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Ensure battery is in good condition and fully charged before proceeding with test procedure. Ensure generator drive belt is in good condition and properly adjusted. If generator drive belt is in good condition and properly adjusted, go to next step. If generator drive belt is not in good condition or not properly adjusted, repair as necessary. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
2. Start engine and allow engine to idle. Turn on all accessories. Increase engine speed to 2000 RPM for 30 seconds and then return engine to idle. Using scan tool, check for DTCs. If no charging system DTCs exist, go to next step. If any charging system DTCs exist, perform appropriate DTC test. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
3. Shut engine off. Turn ignition on with engine off. Using scan tool, actuate generator field. Using 12-volt test light, check for voltage at terminal No. 2 (Dark Green wire) on 2-wire connector at rear of generator. Test light should cycle on and off every 1.4 seconds. While monitoring test light, wiggling wiring harness and connectors between generator and Powertrain Control Module (PCM). PCM is located at passenger's side front corner of engine compartment on inner fender panel. If cycling of test light was not interrupted while wiggling wiring harness and connectors, go to next step. If cycling of test light was interrupted while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
4. Ensure ignition is on with engine off. Using scan tool, check for DTCs. If no charging system DTCs exist, go to next step. If any charging system DTCs exist, perform appropriate DTC test. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
5. Connect voltmeter between positive battery terminal on rear of generator and positive battery terminal. Start engine and allow engine to idle. Note voltage reading. If voltage is .4 volt or less, go to next step. If voltage is more than .4 volt, repair high resistance on Black wire and Red wire between generator and the battery. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
6. Shut engine off. Connect voltmeter between case of generator and negative battery terminal. Start engine and allow engine to idle. Note voltage reading. If voltage is .1 volt or less, go to next step. If voltage is more than .1 volt, repair generator for high resistance between generator case and negative battery terminal. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .
7. Shut engine off. Turn ignition on with engine off. Using scan tool, read battery voltage. Record battery voltage reading. Using voltmeter, check voltage between battery terminals. Record battery voltage reading. Compare the 2 battery voltage readings. If difference between battery voltage readings is one volt or more, go to next step. If difference between battery voltage readings is less than on volt, test is complete.
8. Turn ignition on with engine off. Using scan tool, read battery voltage. Record battery voltage reading. Turn ignition off. Disconnect PCM connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Turn ignition on with engine off. Using voltmeter, check voltage at terminal No. 22 (Red/White wire) on PCM connector C1. This is fused B+ circuit to PCM. Record voltage reading. Compare the 2 battery voltage readings. If battery voltage at PCM is within one volt of battery voltage on indicated on scan tool, replace PCM. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) . If battery voltage at PCM is not within one volt of battery voltage on indicated on scan tool, repair Red/White wire between PCM, fuse No. 1 (20-amp) and battery for high resistance. Fuse No. 1 is located in power distribution center at driver's side of engine compartment, near battery. Perform «TEST VER-3»(ref-9379-S34536476142000102000000) .

TEST NTC-8: CHECKING ENGINE MECHANICAL SYSTEMS

1. At this point in diagnostic test procedure, all engine electrical control systems have been determined to be operating as designed and not causing a driveability problem. Distributor must be check for proper position.
2. Connect scan tool to DLC. Using scan tool in MISCELLANEOUS FUNCTIONS, choose SET SYNC. The SET SYNC will indicate position of distributor for fuel synchronization, not the ignition timing, as ignition timing is controlled by Powertrain Control Module (PCM). Follow instructions on scan tool and start engine. Warm engine to normal operating temperature and note display on scan tool with engine idling. If IN RANGE with zero degrees is displayed, go to next step. If a plus or minus number is displayed next to the degree number, distributor must be repositioned. Loosen distributor clamp retaining bolt. Rotate distributor until IN RANGE is displayed on scan tool. Continue rotating distributor until achieving as close to zero degrees as possible. Tighten distributor clamp bolt to 16 ft. lbs. (22 N.m). Once distributor is properly positioned, go to next step.
3. Following additional items should be checked as possible causes: Check engine vacuum. Engine vacuum must be at least 13 in. Hg with transmission in Neutral. Check engine valve timing. Check engine compression. Check exhaust system for restrictions. Ensure PCV system is functioning properly. Check torque converter stall speed (A/T models). Check power brake booster for internal vacuum leak. Check fuel for contamination. Ensure proper fuel injector driver wiring is installed on correct fuel injector. Ensure fuel injector is not plugged or restricted. If none of the problems listed exist, test is complete. If any of the problems listed exist, repair as necessary. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .

TEST NTC-9: CHECKING ENGINE VACUUM

1. Connect vacuum gauge to engine vacuum source. Start engine and allow engine to idle. While monitoring engine vacuum reading, quickly open and close the throttle several times and then allow engine to idle. Note engine vacuum reading with engine idling.
2. Engine vacuum should be steady and at least 13 in. Hg with transmission in neutral. If engine vacuum is within specification, test is complete. If engine vacuum is not within specification, perform «TEST NTC-8: CHECKING ENGINE MECHANICAL SYSTEMS»(ref-9379-S07165603922000102000000) .

TEST NTC-10: CHECKING EVAPORATIVE EMISSION SYSTEM

Note. EVAP purge solenoid may also be referred to as duty cycle EVAP purge solenoid.

1. Start engine and allow engine to idle. Ensure engine is at normal operating temperature and in closed loop. Using scan tool in SYSTEM TESTS, select PURGE VAPORS TEST. Observe short term adaptive value on scan tool and press # 3 on scan tool. If short term adaptive value changes, shut engine off. Test is complete. If short term adaptive value does not change, go to next step.
2. Inspect EVAP purge hose that goes from EVAP purge solenoid to EVAP canister for being ripped, restricted or signs of dry rotting. On 2.5L, EVAP purge solenoid is located on firewall, at right rear of engine compartment. On 3.9L, 4.7L and 5.9L, EVAP purge solenoid is located on firewall, near brake booster. see scheme 44and see scheme 45. EVAP canister is located inside driver's side frame rail, just in front of fuel tank. If EVAP purge hose is okay, go to next step. If EVAP purge hose is defective, repair or replace EVAP purge hose as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).
3. Remove purge solenoid. Inspect EVAP purge hose that goes from EVAP purge solenoid to the fuel tank for signs of liquid fuel in line. If EVAP purge hose is okay, go to next step. If EVAP purge hose has signs of liquid fuel in line, replace rollover valve. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).
4. Inspect all vacuum hoses in EVAP system for being properly routed, restricted or pinched. If hoses in EVAP system are okay, go to next step. If hoses in EVAP system are improperly routed, restricted or pinched, repair or replace components as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).
5. Remove EVAP purge solenoid. Lightly tap ports on EVAP purge solenoid on a clean solid surface. If foreign material does not come out of ports on EVAP purge solenoid, test is complete. If foreign material comes out of ports on EVAP purge solenoid, clean out all lines and vacuum hoses as necessary, and replace EVAP purge solenoid and EVAP canister. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).

TEST NTC-11: CHECKING FUEL DELIVERY

1. Release fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-9379-S17959720252000102000000) . Connect fuel pressure gauge to fuel pressure test port on fuel rail. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test and note fuel pressure. Fuel pressure should be 44.2-54.2 psi (3.10-3.81 kg/cm 2 ). Stop actuation of ASD fuel system test. If fuel pressure is less than 44.2 psi (3.10 kg/cm 2 ), go to next step. If fuel pressure is 44.2-54.2 psi (3.10-3.81 kg/cm 2 ), go to step 4 . If fuel pressure exceeds 54.2 psi (3.81 kg/cm 2 ), replace fuel filter/fuel pressure regulator. Fuel filter/fuel pressure regulator is mounted in rubber grommet on top of fuel pump module. Fuel pump module is located on top of fuel tank.
2. Inspect fuel supply line between fuel tank and fuel rail for signs of damage or restrictions. If no signs of damage or restrictions exist on fuel supply line, go to next step. If signs of damage or restrictions exist on fuel supply line, repair or replace fuel supply line as necessary.
3. Remove fuel pump module from fuel tank. See FUEL PUMP MODULE under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - TRUCKS & RWD VANS - GASOLINE article. Inspect fuel pump inlet strainer on bottom of fuel pump module for restrictions. If fuel pump inlet strainer is not restricted, replace fuel pump module. If fuel pump inlet strainer is restricted, replace fuel pump inlet strainer.
4. Fuel pump volume should be checked. Release fuel pressure. Disconnect fuel supply from fuel rail. Connect Fuel Line Adapter (6539 for 5/16" fuel line or 6631 for 3/8" fuel line) to disconnected fuel supply line. Place other end of fuel line adapter in graduated cylinder. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test to operate fuel pump for no more than 7 seconds and note fuel pump volume. DO NOT operate fuel pump for more than 7 seconds or fuel pump may be damaged. Stop ASD fuel system test. Fuel pump volume should be at least .52 pint (.25 liter) in 7 seconds. If fuel pump volume is within specification, remove fuel line adapter, reconnect fuel supply line. Test is complete. If fuel pump volume is not within specification, remove fuel line adapter and reconnect fuel supply line. Check for restricted fuel supply line between fuel rail and fuel pump module on top of fuel tank. If no kinks or restrictions exist on fuel supply line, improper fuel pump volume may be caused by restricted fuel pump inlet strainer on bottom of fuel pump module or defective fuel pump module. Replace components as necessary.

TEST NTC-13: CHECKING INTAKE AIR TEMPERATURE (IAT) SENSOR

Note. When performing this test, DO NOT allow more than 5 minutes between measuring temperature of IAT sensor with scan tool and measuring air temperature on inside of intake manifold with temperature probe.

1. Turn ignition on with engine off. Using scan tool in SENSORS mode, read INTAKE AIR TMP DEG. This is the intake air temperature value for IAT sensor. Record this reading. Turn ignition off. Disconnect IAT sensor connector. On 2.5L, 3.9L and 5.9L, IAT sensor is located on intake manifold. see scheme 33and see scheme 36. On 4.7L, IAT sensor is located on intake manifold, near throttle body. see scheme 37 Remove IAT sensor. Using temperature probe, quickly measure air temperature on inside of intake manifold, where IAT sensor is mounted. If temperature of IAT sensor on scan tool is within 10 degrees of temperature obtained on temperature probe, go to next step. If temperature of IAT sensor on scan tool is not within 10 degrees of temperature obtained on temperature probe, check wiring between IAT sensor and Powertrain Control Module (PCM) for high resistance. PCM is located at passenger's side front corner of engine compartment on inner fender panel. If high resistance exists, repair wiring as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000). If wiring is okay, replace IAT sensor. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).
2. Turn ignition off. Inspect wiring harness and connectors between IAT sensor and Powertrain Control Module (PCM). Inspect IAT sensor connector and PCM connectors for corroded, pushed out, miswired or damaged terminals. Also, check for related Technical Service Bulletins (TSBs). If no problems and no related TSBs exist, go to next step. If any problems exist, repair wiring or connectors as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).
3. Start engine and allow engine to idle. Wiggle wiring harness and connectors between PCM and IAT sensor while noting GOOD TRIP counter. If GOOD TRIP counter does not change to zero, test is complete. If GOOD TRIP counter changes to zero while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000).

TEST NTC-15: CHECKING OIL PRESSURE SENSOR

Note. Oil pressure sensor may also be referred to as oil pressure switch. Oil pressure sensor is referred to engine oil pressure sensor in test procedures. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool, read oil pressure sensor voltage. If oil pressure sensor voltage is more than .1 volt, go to next step. If oil pressure sensor voltage is .1 volt or less, go to step 3 .
2. At this time oil pressure sensor is operating properly. Inspect related wiring and connectors for corroded, pushed out, miswired or damaged terminals. Also, check for related Technical Service Bulletins (TSBs). Start engine and allow engine to idle. Wiggle wiring harness and connectors between PCM and oil pressure sensor while monitoring oil pressure sensor voltage. If oil pressure sensor voltage does not change, test is complete. If oil pressure sensor voltage changes while wiggling wiring harness and connectors, repair wiring or connectors as necessary. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .
3. Turn ignition off. Disconnect engine oil pressure sensor connector. On 2.5L, 3.9 and 5.9L, engine oil pressure sensor is located on passenger's side rear corner of engine, just below the distributor. On 4.7L, engine oil pressure sensor is located on oil filter housing. Using voltmeter, check voltage at terminal No. 2 (Gray/Yellow wire) on engine oil pressure sensor connector. If voltage is more than 4.9 volts, go to next step. If voltage 4.9 volts or less, repair open Gray/Yellow wire between engine oil pressure sensor and PCM. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .
4. Ensure ignition is off. Connect jumper wire between terminals on engine oil pressure sensor connector. Turn ignition on with engine off and note operation of oil pressure gauge. If oil pressure gauge reads maximum oil pressure, turn ignition off. Remove jumper wire and go to step 6 . If oil pressure gauge does not read maximum oil pressure, turn ignition off. Remove jumper wire and go next step.
5. Turn ignition off. Ensure engine oil pressure sensor connector is still disconnected. Disconnect Powertrain Control Module (PCM) connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Using ohmmeter, check resistance between terminal No. 1 (Black wire) on engine oil pressure sensor connector and terminal No. 4 (Black wire) on PCM connector C1. If resistance is less than 5 ohms, go to next step. If resistance 5 ohms or more, repair open Black wire between engine oil pressure sensor and PCM. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .
6. Ensure engine oil pressure sensor connector and PCM connectors are still disconnected. Using ohmmeter, check resistance terminals No. 1 (Black wire) and No. 2 (Gray/Yellow wire) on engine oil pressure sensor connector. If resistance is 5 ohms or more, replace PCM. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) . If resistance is less than 5 ohms, repair Gray/Yellow wire and Black wire between engine oil pressure sensor and PCM as they are shorted together. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .

TEST NTC-16: CHECKING PCM POWER & GROUND CIRCUITS

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Using 12-volt test light, check for voltage at terminal No. 22 (Red/White wire) on PCM connector C1. This fused B+ circuit to PCM. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance between battery, fuse No. 1 (20-amp) and Red/White wire between fuse No. 1 and PCM as necessary. Fuse No. 1 is located in power distribution center at driver's side of engine compartment, near battery. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
2. Ensure PCM connectors are still disconnected. Turn ignition on with engine off. Using 12-volt test light, check for voltage at terminal No. 2 (Light Green/Black wire) on PCM connector C1. This is the fused ignition switch output circuit at PCM. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance between ignition switch, fuse No. 9 (10-amp) and Light Green/Black wire between fuse No. 9 and PCM as necessary. Fuse No. 9 is located in fuse block on end of driver's side of instrument panel, near door opening. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
3. Turn ignition off. Reconnect PCM connectors. Turn ignition on with engine off. Using voltmeter, backprobe check voltage at Orange wire on Throttle Position (TP) sensor connector. TP sensor is located on throttle body. On 2.5L, 3.9L and 5.9L, if voltage is less than 4 volts, go to next step. On 4.7L, if voltage is less than 4 volts, go to step 5. If voltage is 4 volts or more, go to NO RESPONSE: POWERTRAIN CONTROL MODULE (PCM) in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.
4. Turn ignition off. Disconnect transmission solenoid connector. Turn ignition on with engine off. Check voltage at terminal No. 2 (Violet/White wire) on transmission solenoid connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace governor pressure sensor. See appropriate OVERHAUL article in AUTOMATIC TRANSMISSIONS. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
5. Turn ignition off. Disconnect TP sensor connector. Turn ignition on with engine off. Check voltage at Orange wire on Throttle Position (TP) sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace TP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
6. Turn ignition off. Disconnect camshaft position sensor connector. On 2.5L, 3.9L and 5.9L, camshaft position sensor is located inside distributor. see scheme 42 On 4.7L, camshaft position sensor is located on front corner of passenger's side cylinder head. see scheme 43 Turn ignition on with engine off. Check voltage at terminal No. 3 (Orange wire) on camshaft position sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace camshaft position sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
7. Turn ignition off. Disconnect crankshaft position sensor connector. On 2.5L, crankshaft position sensor is located on driver's side of bellhousing. see scheme 39 On 3.9L and 5.9L, crankshaft position sensor is located on passenger's side of engine, just above the flywheel. see scheme 40 On 4.7L, crankshaft position sensor is located on passenger's side of cylinder block, behind the starter. see scheme 41 Turn ignition on with engine off. Check voltage at terminal No. 3 (Orange wire) on crankshaft position sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace crankshaft position sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
8. Ensure TP sensor is still disconnected. Turn ignition on with engine off. Check voltage at Black/Light Blue wire on TP sensor connector. If voltage is more than one volt, repair short to voltage in Black/Light Blue wire between PCM and TP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If voltage is one volt or less, go to next step.
9. Turn ignition off. Disconnect Manifold Absolute Pressure (MAP) sensor connector. On 2.5L, 3.9L and 5.9L, MAP sensor is located on side of throttle body. see scheme 33and see scheme 34. On 4.7L, MAP sensor is located on front of intake manifold. see scheme 35 Turn ignition on with engine off. Check voltage at Orange wire on MAP sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace MAP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
10. Turn ignition off. Disconnect PCM connectors. Ensure TP sensor, transmission solenoid, camshaft, crankshaft and MAP sensors are disconnected. Using ohmmeter, check resistance between ground and terminal No. 17 (Orange wire) on PCM connector C1. If resistance is less than 100 ohms, repair short to ground in Orange wire. See WIRING DIAGRAMS article. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). On 2.5L, 3.9L and 5.9L, if resistance is 100 ohms or more, go to step 12. On 4.7L, if resistance is 100 ohms or more, go to next step.
11. Turn ignition off. Disconnect transmission line pressure sensor connector. Transmission line pressure sensor is located on right rear side of transmission. Check resistance between ground and terminal No. 2 (Dark Blue wire) on transmission line pressure sensor connector. If resistance is less than 5 ohms, repair short to ground in Dark Blue wire between TCM and transmission line pressure sensor. TCM is bolted to front of radiator core support at passenger's side front corner of engine compartment. see scheme 38 Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If resistance is 5 ohms or more, go to next step.
12. Turn ignition off. Ensure PCM connectors are still disconnected. Using 12-volt test light connected to battery voltage, check for voltage at terminals No. 31 (Black/Tan wire) and No. 32 (Black/Tan wire) on PCM connector C1. These are the ground circuits for PCM. If test light illuminates brightly, replace PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If test light does not illuminate brightly, repair open or high resistance on Black/Tan wire between PCM and ground connection. Ground connection is located at firewall end of driver's side cylinder head. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).

TEST NTC-17: CHECKING PARK/NEUTRAL SWITCH

Note. This test is for 3.9L & 5.9L only. Park/neutral switch may also be referred to as Park/Neutral Position (PNP) switch. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Apply parking brake. Turn ignition on with engine off. Using scan tool, read Park/Neutral Position (PNP) switch state while moving shift lever through all gear positions. If scan tool does not display P/N and D/R in correct gear positions, go to next step. If scan tool displays P/N and D/R in correct gear positions, PNP switch is functioning properly. Test is complete.
2. Turn ignition off. Place shift lever in Park. Disconnect PCM connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Disconnect PNP switch connector. PNP switch is located on driver's side of transmission, just below shift cable lever and contains a 3-pin connector. Using ohmmeter, check resistance between ground and terminal No. 6 (Black/White wire) on PCM connector C1. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground on Black/White wire between PCM and PNP switch. Perform «TEST VER-8»(ref-9379-S21081389032000102000000) .
3. Ensure PCM connectors and park/neutral switch connectors are still disconnected. Using ohmmeter, check resistance between terminal No. 2 (Black/White wire) on PNP switch connector and terminal No. 6 (Black/White wire) on PCM connector C1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open on Black/White wire between PCM and PNP switch. Perform «TEST VER-8»(ref-9379-S21081389032000102000000) .
4. Ensure PCM connectors are still disconnected. Reinstall connector on PNP switch. Using ohmmeter, check resistance between ground and terminal No. 6 (Black/White wire) on PCM connector C1 while moving shift lever through all gear positions and returning to Park. If resistance does not change from more than 10 ohms to less than 10 ohms, replace PNP switch. Perform «TEST VER-8»(ref-9379-S21081389032000102000000) . If resistance changes from more than 10 ohms to less than 10 ohms, replace PCM. Perform «TEST VER-8»(ref-9379-S21081389032000102000000) .

TEST NTC-19: CHECKING SECONDARY IGNITION SYSTEM

1. Connect engine analyzer to engine. Start engine and allow engine to idle. If engine will not idle, maintain engine speed at more than idle. Set scope on engine analyzer to read display or parade pattern. With engine idling, using spray bottle with water, spray spark plug wires while monitoring secondary ignition pattern. If secondary ignition pattern does not change with water being applied, go to next step. If secondary ignition pattern changes with water being applied, replace spark plug wire as necessary. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .
2. Analyze secondary ignition pattern using engine analyzer manufacturer's instructions. If secondary ignition pattern is okay, go to next step. If secondary ignition pattern is not correct, repair indicated component in secondary ignition system. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .
3. Remove any spark plug wire while observing secondary ignition kilovolt peak line. If open secondary ignition voltage is at least 25 kilovolts, test is complete. If open secondary ignition voltage is not at least 25 kilovolts, replace ignition coil. Perform «TEST VER-2»(ref-9379-S22462118962000102000000) .

TEST NS-SEL: NO START TEST SELECTION

No Start (NS) tests may be performed if a no response or no start problem exists. Perform appropriate NS test in accordance with the problem to be checked. See NO START TEST MENU table.

NO START TEST MENU

TEST NS-1: ENGINE CRANKS BUT WILL NOT START

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Check for open fuses related to a no-start condition in the power distribution center and fuse block. Power distribution center at driver's side of engine compartment, near battery. Fuse block is located on end of driver's side of instrument panel, near door opening. If all fuses are okay, go to next step. If any fuse is defective, check related wiring circuit for a short to ground. Repair as necessary. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
2. Check to see if battery is fully charged and in good condition. If battery is fully charged and in good condition, go to next step. If battery is not fully charged, charge the battery and then attempt to start the engine by cranking engine for at least 15 seconds for 3 consecutive times. This will allow Powertrain Control Module (PCM) to set and DTCs that may have been cleared from PCM due to the low battery voltage. Go to next step.
3. Turn ignition on with engine off. Using scan tool, check for DTCs. If any DTCs exist, perform appropriate test for each DTC before proceeding with this test. If scan tool displays NO RESPONSE and engine does not start, perform «TEST NS-3: ENGINE DOES NOT START & SCAN TOOL DISPLAYS NO RESPONSE»(ref-9379-S02419182072000102000000). Attempt to communicate with Controller Anti-Lock Brake (CAB) module to ensure the bus is operational. If scan tool displays a bus failure, this indicates either a scan tool failure or bus failure. To diagnose and correct bus failures, see COMMUNICATIONS under SYSTEM TESTS in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT. If no DTCs exist, NO RESPONSE is not displayed on scan tool and no bus failure displays exist, go to next step.
4. Using scan tool in INPUTS/OUTPUTS mode, read VEH THEFT SECURITY status. If VEH THEFT SECURITY status indicates FUEL ON, go to next step. If VEH THEFT SECURITY status does not indicate FUEL ON, check vehicle theft security system and ensure bus is operating properly. See TROUBLE SHOOTING in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.
5. Turn ignition on. Using scan tool, select DTCs and RELATED FUNCTIONS. Read SECONDARY INDICATORS while cranking engine. If scan tool indicates no secondary indicators, go to next step. If scan tool indicates any secondary indicators, repair symptom for secondary indicators as necessary.
6. Using scan tool in SENSORS mode, read CURRENT CKP COUNT while cranking engine. CKP counts are the crankshaft position sensor counts. If CURRENT CKP COUNT changes while cranking engine, go to next step. If CURRENT CKP COUNT does not change while cranking engine, perform «DTC P0320: NO CRANK REFERENCE SIGNAL AT PCM»(ref-9379-S29798334622000102000000) test.
7. Using scan tool in SENSORS mode, read CURRENT CMP COUNT while cranking engine. CMP counts are the camshaft position sensor counts. If CURRENT CMP COUNT changes while cranking engine, go to next step. If CURRENT CMP COUNT does not change while cranking engine, perform «DTC P0340: NO CAM SIGNAL AT PCM»(ref-9379-S17195433422000102000000) test.
8. If vehicle is equipped with a 4.7L engine, go to next step. If vehicle is not equipped with a 4.7L engine, go to step 10.
9. Ensure ignition is on with engine off. Using scan tool in INPUTS/OUTPUTS mode, read CURRENT SYNC STATE while cranking engine. If CURRENT SYNC STATE does not indicate OUT OF STATE while cranking engine, go to step 17. If CURRENT SYNC STATE indicates OUT OF STATE while cranking engine, check for a short between the signal circuits for camshaft position sensor and crankshaft position sensor. Signal circuit for camshaft position sensor is a Tan/Yellow wire and signal circuit for crankshaft position sensor is a Gray/Black wire. The signal circuits go between the PCM and each sensor. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Camshaft position sensor is located on front corner of passenger's side cylinder head. see scheme 43 Crankshaft position sensor is located on passenger's side of cylinder block, behind the starter. see scheme 41 If short exists, repair wiring as necessary. «TEST VER-1»(ref-9379-S13425996612000102000000). If no short exist, this condition may be caused by improper engine valve timing. Check and repair as necessary. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
10. Ensure ignition is on with engine off. Using scan tool in INPUTS/OUTPUTS mode, read CURRENT SYNC STATE while cranking engine. If CURRENT SYNC STATE does not indicate OUT OF STATE while cranking engine, go to next step. If CURRENT SYNC STATE indicates OUT OF STATE while cranking engine, check for a short between the signal circuits for camshaft position sensor and crankshaft position sensor. Signal circuit for camshaft position sensor is a Tan/Yellow wire and signal circuit for crankshaft position sensor is a Gray/Black wire. The signal circuits go between the PCM and each sensor. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Camshaft position sensor is located on front corner of passenger's side cylinder head. see scheme 43 Crankshaft position sensor is located on passenger's side of cylinder block, behind the starter. see scheme 41 If short exists, repair wiring as necessary. «TEST VER-1»(ref-9379-S13425996612000102000000). If no short exist, this condition may be caused by improper engine valve timing. Check and repair as necessary. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
11. Turn ignition off. Disconnect spark plug wire at cylinder No. 1. On 2.5L, cylinder No. 1 is first cylinder back from front of engine. On 3.9L and 5.9L, cylinder No. 1 is first cylinder back from front of engine on driver's side of engine. Connect spark plug wire to spark tester. Connect spark tester to good ground. Ensure spark tester is properly grounded to prevent damage to ignition coil. Crank engine for 10 seconds and check for spark. Consider 1-2 sparks as a no spark condition. If good spark does not exist, remove spark tester. Reconnect spark plug wire and go to next step. If good spark exists, remove spark tester. Reconnect spark plug wire. Go to step 17.
12. Ensure ignition is off. Remove ignition coil wire from distributor cap. Connect ignition coil wire to spark tester. Connect spark tester to good ground. Crank engine for 10 seconds and check for spark. Consider 1-2 sparks as a no spark condition. If good spark does not exist, remove spark tester. Go to next step. If good spark exists, replace distributor cap, rotor or spark plug wires that caused the loss of spark. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
13. Ensure ignition is off. Disconnect ignition coil connector. Using ohmmeter, check ignition coil primary resistance between both electrical terminals on ignition coil. If ignition coil primary resistance is.30-.70 ohm, go to next step. If ignition coil primary resistance is not.30-.70 ohm, replace ignition coil. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
14. Using ohmmeter, check ignition coil secondary resistance between negative electrical terminal on ignition coil and ignition coil wire terminal on ignition coil. If ignition coil secondary resistance is 11,000-14,000 ohms, go to next step. If ignition coil secondary resistance is not 11,000-14,000 ohms, replace ignition coil. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
15. Ensure ignition coil connector is still disconnected. Using 12-volt test light connected to battery voltage, check for voltage at terminal No. 2 (Black/Gray wire) on ignition coil connector while cranking engine. This is the ignition coil driver. If test light blinks while cranking engine, go to next step. If test light does not blink while cranking engine, check for open or short in Black/Gray wire between ignition coil and PCM. PCM is located at passenger's side front corner of engine compartment on inner fender panel. If open or short exists in Black/Gray wire, repair wiring as necessary. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If open or short does not exist in Black/Gray wire, go to next step.
16. Ensure ignition coil connector is still disconnected. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test. Using 12-volt test light, check for voltage at terminal No. 1 (Dark Green/Orange wire) on ignition coil connector. If test light illuminates brightly, stop actuation of ASD relay. Go to next step. If test light does not illuminate brightly, stop actuation of ASD relay. Repair open or high resistance on Dark Green/Orange wire between ASD relay and ignition coil. ASD relay is located in power distribution center at driver's side of engine compartment, near battery. see scheme 3 Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
17. Cycle ignition off and back on. Using scan tool, actuate ASD fuel system test. Using stethoscope, listen for fuel pump operation. If fuel pump operation can be heard, go to next step. If fuel pump operation can not be heard, go to step 23.
18. Check the following additional items as possible causes: Check engine valve timing. Check engine compression. Check exhaust system for restrictions. Check fuel for contamination. Ensure proper fuel injector driver wiring is installed on correct fuel injector. Ensure fuel injector is not plugged or restricted. If none of the problems listed exist, go to next step. If any of the problems listed exist, repair as necessary. Perform «TEST VER-2»(ref-9379-S22462118962000102000000).
19. Release fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-9379-S17959720252000102000000). Connect fuel pressure gauge to fuel pressure test port on fuel rail. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test and note fuel pressure. Fuel pressure should be 44.2-54.2 psi (3.10-3.81 kg/cm 2 ). Stop actuation of ASD fuel system test. If fuel pressure is less than 44.2 psi (3.10 kg/cm 2 ), go to next step. If fuel pressure is 44.2-54.2 psi (3.10-3.81 kg/cm 2 ), go to step 22. If fuel pressure exceeds 54.2 psi (3.81 kg/cm 2 ), replace fuel filter/fuel pressure regulator. Fuel filter/fuel pressure regulator is mounted in rubber grommet on top of fuel pump module. Fuel pump module is located on top of fuel tank.
20. Inspect fuel supply line between fuel tank and fuel rail for signs of damage or restrictions. If no signs of damage or restrictions exist on fuel supply line, go to next step. If signs of damage or restrictions exist on fuel supply line, repair or replace fuel supply line as necessary.
21. Remove fuel pump module from fuel tank. See FUEL PUMP MODULE under FUEL SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - TRUCKS & RWD VANS - GASOLINE article. Inspect fuel pump inlet strainer on bottom of fuel pump module for restrictions. If fuel pump inlet strainer is not restricted, replace fuel pump module. If fuel pump inlet strainer is restricted, replace fuel pump inlet strainer.
22. Fuel pump volume should be checked. Release fuel pressure. Disconnect fuel supply from fuel rail. Connect Fuel Line Adapter (6539 for 5/16" fuel line or 6631 for 3/8" fuel line) to disconnected fuel supply line. Place other end of fuel line adapter in graduated cylinder. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test to operate fuel pump for no more than 7 seconds and note fuel pump volume. DO NOT operate fuel pump for more than 7 seconds or fuel pump may be damaged. Stop ASD fuel system test. Fuel pump volume should be at least.52 pint (.25 liter) in 7 seconds. If fuel pump volume is within specification, remove fuel line adapter, reconnect fuel supply line. Go to next step. If fuel pump volume is not within specification, remove fuel line adapter and reconnect fuel supply line. Check for restricted fuel supply line between fuel rail and fuel pump module on top of fuel tank. If no kinks or restrictions exist on fuel supply line, improper fuel pump volume may be caused by restricted fuel pump inlet strainer on bottom of fuel pump module or defective fuel pump module. Replace components as necessary.
23. Turn ignition off. Disconnect fuel pump module connector. Fuel pump module is located on top of fuel tank. Using ohmmeter, check resistance between ground and terminal No. 1 (Black wire) on fuel pump module connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open fuel pump ground circuit (Black wire), between fuel pump module and ground near battery.
24. Ensure fuel pump module connector is still disconnected. Turn ignition on with engine off. Using scan tool, actuate ASD fuel system test. Using 12-volt test light, check for voltage at terminal No. 4 (Dark Green/Black wire) on fuel pump module connector. If test light illuminates brightly, stop actuation of ASD relay. Replace fuel pump module. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If test light does not illuminate brightly, stop actuation of ASD relay. Go to next step.
25. Ensure ignition is off. Remove fuel pump relay. Fuel pump relay is located in Power Distribution Center (PDC) at driver's side of engine compartment, near battery. see scheme 3 Ensure no corrosion exists on terminals of fuel pump relay and cavities in fuse block for fuel pump relay. Note cavities in fuse block for fuel pump relay. Using voltmeter, check voltage at cavity No. 30 (Red/White wire) in PDC for fuel pump relay. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open between battery fuse No. 1 (20-amp) and Red/White wire between fuse No. 1 in PDC and cavity No. 30 in PDC for fuel pump relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
26. Ensure ignition is off, fuel pump relay is still removed from PDC. Using ohmmeter, check resistance between cavity No. 87 (Dark Green/Black wire) in PDC for fuel pump relay and terminal No. 4 (Dark Green/Black wire) on fuel pump module connector. If resistance is less than 5 ohms, replace fuel pump relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If resistance is 5 ohms or more, repair open on Dark Green/Black wire between cavity No. 87 in PDC for fuel pump relay and fuel pump module. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).

TEST NS-2: ENGINE WILL NOT CRANK

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For starter relay wiring diagram, see appropriate STARTERS article in STARTING & CHARGING SYSTEMS.

1. On models equipped with A/T, go to next step. On models equipped with M/T, go to step 9.
2. Turn ignition off. Remove starter relay. Starter relay is located in Power Distribution Center (PDC) at driver's side of engine compartment, near battery. see scheme 3 Note cavities in power distribution center for starter relay. Using 12-volt test light connected to battery voltage, check for voltage at cavity No. 85 (Black/White wire) in PDC for starter relay. This is the ground circuit to starter relay. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open on Black/White wire between cavity No. 85 in PDC for starter relay and ground at driver's side rear of valve cover on 2.5L and lower right front of engine on all others. Repair as necessary. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
3. Ensure starter relay is removed from PDC. Disconnect starter relay output wire (Brown wire) at starter solenoid. This is the small wire that goes from starter solenoid back to the starter relay. Note cavities in power distribution center for starter relay. see scheme 3 Connect starter end of Brown wire to ground. Using test light connected to battery voltage, probe starter relay output wire, cavity No. 87 (Brown wire) in PDC for starter relay. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open on Brown wire between starter solenoid and cavity No. 87 (Brown wire) in PDC for starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
4. Check battery cables for excessive resistance by checking voltage drop on each battery cable. If voltage drop on battery cables is not more than.2 volt, go to next step. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If voltage drop on any battery cable is more than.2 volt, repair battery cable for excessive resistance. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
5. Using 12-volt test light, check for voltage at cavity No. 30 (Pink/Black wire) in PDC for starter relay. see scheme 3 This is the B+ circuit. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance on B+ circuit (Pink/Black wire). B+ circuit is a Pink/Black wire that goes from fuse No. 9 (40-amp) in PDC and goes to cavity No. 30 in PDC for starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
6. Attempt to rotate crankshaft one full revolution to ensure engine is not seized. If crankshaft rotates one full revolution, go to next step. If crankshaft will not rotate one full revolution, repair engine mechanical problem. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
7. Depress clutch pedal to floor and hold. Using 12-volt test light, check for voltage at cavity No. 86 (Dark Blue/Yellow wire) in PDC for starter relay with ignition switch in START position. see scheme 3 This is the fused ignition switch output circuit. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance on fused ignition switch output. Fused ignition switch output is a Yellow wire that goes from ignition switch to in-line connector C200, where it changes Dark Blue/Yellow wire to clutch switch and goes to cavity No. 86 in PDC for starter relay. C200 in-line connector is located behind left side of instrument cluster above clutch switch. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
8. Ensure shift lever is in Neutral and parking brake is applied. Use care when performing this test procedure, as engine may crank over. Note cavities in PDC for starter relay. see scheme 3 Momentarily connect jumper wire between cavities No. 30 and 87 for starter relay in power distribution center. If starter operates and engine cranks over, replace starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If starter does not operate and engine does not crank over, replace starter. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
9. Ensure ignition is off. Remove starter relay. Starter relay is located in Power Distribution Center (PDC) at driver's side of engine compartment, near battery. see scheme 3 Connect starter end of Brown wire to ground. Using test light connected to battery voltage, probe starter relay output wire, cavity No. 87 (Brown wire) in PDC for starter relay. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open on Brown wire between starter solenoid and cavity No. 87 (Brown wire) in PDC for starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
10. Check battery cables for excessive resistance by checking voltage drop on each battery cable. If voltage drop on battery cables is not more than.2 volt, go to next step. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If voltage drop on any battery cable is more than.2 volt, repair battery cable for excessive resistance. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
11. Using 12-volt test light, check for voltage at cavity No. 30 (Pink/Black wire) in PDC for starter relay. see scheme 3 This is the B+ circuit. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance on B+ circuit (Pink/Black wire). B+ circuit is a Pink/Black wire that goes from fuse No. 9 (40-amp) in PDC and goes to cavity No. 30 in PDC for starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
12. Ensure shift lever is in Park. Using 12-volt test light, check for voltage at cavity No. 86 (Dark Blue/Yellow wire) in PDC for starter relay with ignition switch in START position. see scheme 3 This is the fused ignition switch output circuit. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance on fused ignition switch output. Fused ignition switch output is a Yellow wire that goes from ignition switch to in-line connector C200, where it changes Dark Blue/Yellow wire to clutch switch jumper and goes to cavity No. 86 in PDC for starter relay. C200 in-line connector is located behind left side of instrument cluster above clutch switch jumper. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
13. Attempt to rotate crankshaft one full revolution to ensure engine is not seized. If crankshaft rotates one full revolution, go to next step. If crankshaft will not rotate one full revolution, repair engine mechanical problem. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
14. Using 12-volt test light connected to battery voltage, check for voltage at cavity No. 85 (Black/White wire) in PDC for starter relay. If test light illuminates, go to next step. If test light does not illuminate, repair open on Black/White wire between cavity No. 85 in power distribution center for starter relay and terminal No. 3 (Black/White wire) on transmission solenoid assembly (4.7L) or park/neutral switch (3.9L and 5.9L). On 4.7L, transmission solenoid assembly is located on valve body in the transmission with a 23-pin connector located on driver's side of transmission, just in front of shift cable lever on side of transmission. On 5.2L and 5.9L, park/neutral switch is located on driver's side of transmission, just below shift cable lever and contains a 3-pin connector. On all models, perform «TEST VER-1»(ref-9379-S13425996612000102000000).
15. Ensure shift lever is in Park and parking brake is applied. Use care when performing this test procedure, as engine may crank over. Note cavities in PDC for starter relay. see scheme 3 Momentarily connect jumper wire between cavities No. 30 and 87 for starter relay in power distribution center. If starter operates and engine cranks over, replace starter relay. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If starter does not operate and engine does not crank over, replace starter. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).

TEST NS-3: ENGINE DOES NOT START & SCAN TOOL DISPLAYS NO RESPONSE

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool, attempt to read DTCs. If ignition was on when NO RESPONSE was displayed on scan tool, go to next step. If ignition was not on when NO RESPONSE was displayed on scan tool, turn ignition on and recheck display on scan tool. If NO RESPONSE is still displayed on scan tool and no-start condition exists, go to next step. If NO RESPONSE is not displayed, perform «TEST VER-1»(ref-9379-S13425996612000102000000).
2. Ensure ignition is off. Disconnect Powertrain Control Module (PCM) connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Turn ignition on with engine off. Using 12-volt test light, check for voltage at terminal No. 2 (Light Green/Black wire) on PCM connector C1. This is the fused ignition switch output circuit at PCM. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance between ignition switch, fuse No. 9 (10-amp) and Light Green/Black wire between fuse No. 9 and PCM as necessary. Fuse No. 9 is located in junction block on end of driver's side of instrument panel, near door opening. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
3. Turn ignition off. Ensure PCM connectors are still disconnected. Using 12-volt test light connected to battery voltage, check for voltage at terminals No. 31 (Black/Tan wire) and No. 32 (Black/Tan wire) on PCM connector C1. These are the ground circuits for PCM. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open or high resistance on Black/Tan wire between PCM and ground connection. Ground connection is located on passenger's side front corner of engine compartment on inner fender near rear of PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
4. Turn ignition off. Reconnect PCM connectors. Turn ignition on with engine off. Using voltmeter, backprobe check voltage at Orange wire on Throttle Position (TP) sensor connector. TP sensor is located on throttle body. On 2.5L, 3.9L and 5.9L, if voltage is less than 4 volts, go to next step. On 4.7L, if voltage is less than 4 volts, go to step 6. If voltage is 4 volts or more, go to NO RESPONSE: POWERTRAIN CONTROL MODULE (PCM) in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.
5. Turn ignition off. Disconnect transmission solenoid connector. Turn ignition on with engine off. Check voltage at terminal No. 2 (Violet/White wire) on transmission solenoid connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace governor pressure sensor. See appropriate OVERHAUL article in AUTOMATIC TRANSMISSIONS. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
6. Turn ignition off. Disconnect TP sensor connector. Turn ignition on with engine off. Check voltage at Orange wire on Throttle Position (TP) sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace TP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
7. Turn ignition off. Disconnect camshaft position sensor connector. On 2.5L, 3.9L and 5.9L, camshaft position sensor is located inside distributor. see scheme 42 On 4.7L, camshaft position sensor is located on front corner of passenger's side cylinder head. see scheme 43 Turn ignition on with engine off. Check voltage at terminal No. 3 (Orange wire) on camshaft position sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace camshaft position sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
8. Ensure TP sensor is still disconnected. Turn ignition on with engine off. Check voltage at Black/Light Blue wire on TP sensor connector. If voltage is more than one volt, repair short to voltage in Black/Light Blue wire between PCM and TP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If voltage is one volt or less, go to next step.
9. Turn ignition off. Disconnect crankshaft position sensor connector. On 2.5L, crankshaft position sensor is located on driver's side of bellhousing. see scheme 39 On 3.9L and 5.9L, crankshaft position sensor is located on passenger's side of engine, just above the flywheel. see scheme 40 On 4.7L, crankshaft position sensor is located on passenger's side of cylinder block, behind the starter. see scheme 41 Turn ignition on with engine off. Check voltage at terminal No. 3 (Orange wire) on crankshaft position sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace crankshaft position sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
10. Turn ignition off. Disconnect Manifold Absolute Pressure (MAP) sensor connector. On 2.5L, 3.9L and 5.9L, MAP sensor is located on side of throttle body. see scheme 33and see scheme 34. On 4.7L, MAP sensor is located on front of intake manifold. see scheme 35 Turn ignition on with engine off. Check voltage at Orange wire on MAP sensor connector. If voltage is less than 4 volts, go to next step. If voltage is 4 volts or more, replace MAP sensor. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
11. Turn ignition off. Disconnect PCM connectors. Ensure TP, transmission solenoid, camshaft, crankshaft and MAP sensors are disconnected. Using ohmmeter, check resistance between ground and terminal No. 17 (Orange wire) on PCM connector C1. If resistance is less than 100 ohms, repair short to ground in Orange wire. See WIRING DIAGRAMS article. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). On 2.5L, 3.9L and 5.9L, if resistance is 100 ohms or more, go to step 13. On 4.7L, if resistance is 100 ohms or more, go to next step.
12. Turn ignition off. Disconnect transmission line pressure sensor connector. Transmission line pressure sensor is located on right rear side of transmission. Check resistance between ground and terminal No. 2 (Dark Blue wire) on transmission line pressure sensor connector. If resistance is less than 5 ohms, repair short to ground in Dark Blue wire between TCM and transmission line pressure sensor. TCM is bolted to front of radiator core support at passenger's side front corner of engine compartment. see scheme 38 Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If resistance is 5 ohms or more, go to next step.
13. Turn ignition on with engine off. Using 12-volt test light, check for voltage at terminal No. 22 (Red/White wire) on PCM connector C1. This fused B+ circuit to PCM. If test light does not illuminate, go to next step. If test light illuminates, replace PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
14. Turn ignition off. Remove fuse No. 1 (20-amp) for PDC. see scheme 3 Inspect fuse No. 1. If fuse No. 1 is okay, go to next step. If fuse No. 1 is defective, go to step 17.
15. Using voltmeter, check for voltage at Red wire cavity in power distribution center for fuse No. 1. This is the B+ cavity which receives voltage from the battery. If voltage is more than 10 volts at Red wire cavity in power distribution center for fuse No. 1, go to next step. If voltage is 10 volts or less at Red wire cavity in power distribution center for fuse No. 1, repair open on Red wire between fuse No. 1 and the battery. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
16. Ensure PCM connectors are still disconnected. Using ohmmeter, check resistance between terminal No. 22 (Red/White wire) on PCM connector C1 and Red/White wire cavity in power distribution center for fuse No. 1. This is the fused B+ circuit to PCM. If resistance is less than 5 ohms, go to step 23. If resistance is 5 ohms or more, repair open on Red/White wire between PCM and Red/White wire cavity in power distribution center for fuse No. 1. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
17. Ensure ignition is off. Remove ASD relay from power distribution center. see scheme 3 Note cavities in power distribution center for ASD relay. Using ohmmeter, check resistance between ground and cavity No. 87 (Dark Green/Orange wire) in PDC in for ASD relay. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step 23.
18. Ensure ASD relay is removed from power distribution center. Using ohmmeter, check resistance between ground and cavity No. 87 (Dark Green/Orange wire) in power distribution center for ASD relay while disconnecting each oxygen sensor one at a time. This will check for a short to ground in each oxygen sensor. If resistance does not become more than 5 ohms with oxygen sensors disconnected, go to next step. If resistance becomes more than 5 ohms with oxygen sensors disconnected, replace oxygen sensor that caused the change in the resistance. It may be necessary to replace fuse "A" (15-amp) and fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
19. Ensure ASD relay is removed from power distribution center and oxygen sensor connectors are still disconnected. Using ohmmeter, check resistance between ground and cavity No. 5 (Dark Green/Orange wire) in power distribution center for ASD relay while disconnecting leak detection pump connector. Leak detection pump is located at driver's side front corner of engine compartment, just below the battery. see scheme 46 This will check for a shorted leak detection pump. If resistance does not become more than 5 ohms with leak detection pump connector disconnected, go to next step. If resistance becomes more than 5 ohms with leak detection pump connector disconnected, replace leak detection pump. It may be necessary to replace fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
20. Ensure ASD relay is removed from power distribution center and oxygen sensor connectors are still disconnected. Using ohmmeter, monitor resistance between ground and cavity No. 5 (Dark Green/Orange wire) in power distribution center for ASD relay while disconnecting each fuel injector connector one at a time. This will check for a shorted fuel injector. If resistance does not become more than 5 ohms with fuel injector connectors disconnected, go to next step. If resistance becomes more than 5 ohms with fuel injector connectors disconnected, replace fuel injector that caused the change in the resistance. It may be necessary to replace fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
21. Ensure ASD relay is removed from power distribution center and oxygen sensor connectors are still disconnected. Using ohmmeter, monitor resistance between ground and cavity No. 5 (Dark Green/Orange wire) in power distribution center for ASD relay while disconnecting 2-pin connector from rear of generator. This will check for a shorted generator. If resistance does not become more than 5 ohms with 2-pin connector disconnected, go to next step. If resistance becomes more than 5 ohms, repair generator for short to ground. It may be necessary to replace fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
22. Ensure ASD relay is removed from power distribution center and oxygen sensor connectors are still disconnected. Using ohmmeter, check resistance between ground and cavity No. 5 (Dark Green/Orange wire) in power distribution center for ASD relay while disconnecting each ignition coil connector one at a time. This will check for a shorted ignition coil. If resistance does not become more than 5 ohms with ignition coil connector disconnected, it is assumed that wiring harness on output circuit from ASD relay to various components is shorted to ground. Repair wiring harness as necessary. It may be necessary to replace fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If resistance becomes more than 5 ohms, replace ignition coil that caused the change in the resistance. It may be necessary to replace fuse No. 3 (30-amp) in power distribution center. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).
23. Ensure ignition is off. Ensure ASD relay and fuse No. 1 are removed from power distribution center. Ensure PCM connectors are disconnected. Using ohmmeter, check resistance between ground and terminal No. 22 (Red/White wire) in PCM connector. If resistance is 5 ohms or more, replace PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000). If resistance is less than 5 ohms, repair short to ground on Red/White wire between fuse No. 1 and PCM. Perform «TEST VER-1»(ref-9379-S13425996612000102000000).

TEST NS-4: START & STALL CONDITION

Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

1. Turn ignition on with engine off. Using scan tool in INPUTS/OUTPUTS mode, read VEH THEFT SECURITY status. If VEH THEFT SECURITY status indicates FUEL ON, go to next step. If VEH THEFT SECURITY status does not indicate FUEL ON, check vehicle theft security system and ensure bus is operating properly. See TROUBLE SHOOTING in BODY CONTROL MODULES - DAKOTA & DURANGO article in ACCESSORIES & EQUIPMENT.
2. Ensure ignition is on with engine off. Ensure throttle is fully closed and against the stop. Using scan tool, read TP sensor voltage with throttle fully closed. If TP sensor voltage is 1.1 volts or less with throttle fully closed, go to next step. If TP sensor voltage is more than 1.1 volts with throttle fully closed, check for a binding condition in throttle body or linkage. If no binding condition exists and throttle plate fully closes, replace TP sensor. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) . If binding condition exists, repair as necessary. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
3. Using scan tool, monitor Throttle Position (TP) sensor voltage while slowly opening and closing the throttle. If TP sensor voltage changes smoothly, go to next step. If TP sensor voltage does not change smoothly, replace TP sensor. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
4. Thermostat must be operating properly when performing this test procedure. Turn ignition on with engine off. Using scan tool in SENSORS mode, read ENG COOLANT TMP DEG. This is the engine coolant temperature value for ECT sensor. If engine coolant temperature is more than 180°F (82°C), allow engine to cool until engine coolant temperature is 150°F (66°C). Start engine and allow engine to idle. Using scan tool in SENSORS mode, read ENG COOLANT TMP DEG again while warming engine to normal operating temperature. The ENG COOLANT TMP DEG reading on scan tool should increase in a smooth transition as engine coolant temperature increases and temperature should become at least 180°F (82°C). If ENG COOLANT TMP DEG reading on scan tool increases in a smooth transition as engine coolant temperature increases and temperature becomes at least 180°F (82°C), shut engine off. Go to next step. If ENG COOLANT TMP DEG reading on scan tool does not increase in a smooth transition as engine coolant temperature increases or temperature does not become at least 180°F (82°C), shut engine off. Replace ECT sensor. On 2.5L, ECT sensor is located in thermostat housing and contains Black/Light Blue wire and Tan/Black wire in the connector. On 3.9L and 5.9L, ECT sensor is located near thermostat housing on intake manifold and contains Black/Light Blue wire and Tan/Black wire in the connector. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
5. Ensure ignition is off. Disconnect idle air control motor connector. Idle air control motor is mounted on throttle body. Disconnect Powertrain Control Module (PCM) connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Using ohmmeter, check resistance between terminal No. 19 (Gray/Red wire) on PCM connector C1 and terminal No. 1 (Gray/Red wire) on idle air control motor connector, between terminal No. 10 (Yellow/Black wire) on PCM connector C1 and terminal No. 2 (Yellow/Black wire) on idle air control motor connector, between terminal No. 11 (Brown/White wire) on PCM connector C1 and terminal No. 3 (Brown/White wire) on idle air control motor connector, between terminal No. 20 (Violet/Black wire) on PCM connector C1 and terminal No. 4 (Violet/Black wire) on idle air control motor connector. If resistance in all measurements is less than 5 ohms, go to next step. If resistance in any measurement is 5 ohms or more, repair open between idle air control motor and PCM. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .
6. Turn ignition off. Check fuel pressure and fuel pump volume. See «TEST NTC-11: CHECKING FUEL DELIVERY»(ref-9379-S21277222602000102000000) . If fuel pressure is not within specification, repair fuel system as necessary. If fuel pressure and fuel pump volume are within specification, go to next step. If fuel pressure or fuel pump volume are not within specification, repair fuel system as necessary.
7. Check following item as possible causes for a start and stall: Check for related Technical Service Bulletins (TSBs). Check for fuel contamination. Check exhaust system for restrictions. Check engine compression. Check engine valve timing.
8. If none of the problems listed exist, go to next step. If any of the problems listed exist, repair as necessary.
9. Ensure ignition is off and idle air control motor connector is still disconnected. Reinstall PCM connectors. Start engine and allow to idle. Connect 12-volt test light to ground and probe each idle air control motor connector for 10 seconds. If test light flashes on and off at each terminal, replace PCM. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) . If test light does not flash on and off at each terminal, replace idle air control motor. Perform «TEST VER-5»(ref-9379-S16183295292000102000000) .

TEST VER-1: POWERTRAIN VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-2: ROAD TEST VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-3: CHARGING SYSTEM VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-4: SPEED CONTROL VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-5: OBD-II MONITOR VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into the PCM to prevent Diagnostic Trouble Codes (DTCs) from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-6: LEAK DETECTION PUMP (LDP) VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into the PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-7: FUEL/MISFIRE VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-8: TRANSMISSION VERIFICATION

Note. If Powertrain Control Module (PCM) was replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.

TEST VER-9: TRANSMISSION VERIFICATION

Note. Test applies to 4.7L. If Powertrain Control Module (PCM) is replaced, the correct vehicle mileage and Vehicle Identification Number (VIN) must be programmed into PCM to prevent DTCs from being stored Anti-Lock Brake System (ABS) module and Supplemental Restraint System (SRS) module. To program PCM and clear DTCs from ABS and SRS modules, proceed to appropriate procedure.