Engine Controls - Trouble Shooting - No Codes: Other Chrysler Voyager IV

ENGINE DOES NOT CRANK

If engine does not crank, check starter circuits. See NO CRANK CONDITION under NO-START DIAGNOSIS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

ENGINE DOES NOT START

If engine cranks but does not start or engine does not start and scan tool displays no response, perform appropriate test. See NO-START DIAGNOSIS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

HARD START

Check listed items as follows

1. Check engine vacuum. See CHECKING ENGINE VACUUM under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
7. Check EGR system. See EXHAUST GAS RECIRCULATION SYSTEM under EMISSION SYSTEMS & SUBSYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
8. Check inlet air temperature sensor. See INLET AIR TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

STARTS & STALLS

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

HESITATION/STUMBLE

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check engine vacuum. See CHECKING ENGINE VACUUM under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

SURGE

Check listed items as follows

1. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check inlet air temperature sensor. See INLET AIR TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
7. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
8. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

LACK OF POWER/SLUGGISH

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

SPARK KNOCK/DETONATION

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

CUTS OUT/MISSES

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

BACKFIRE

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

RUNS ROUGH/UNSTABLE, ERRATIC IDLE

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check engine vacuum. See CHECKING ENGINE VACUUM under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
7. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
8. Check inlet air temperature sensor. See INLET AIR TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

POOR FUEL ECONOMY

Check listed items as follows

1. Check powertrain control module power and ground circuits. See POWERTRAIN CONTROL MODULE under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
2. Check engine vacuum. See CHECKING ENGINE VACUUM under PRELIMINARY INSPECTION & ADJUSTMENTS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
3. Check fuel pressure. See CHECKING FUEL DELIVERY under FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
4. Check engine coolant temperature sensor. See ENGINE COOLANT TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
5. Check throttle position sensor. See THROTTLE POSITION SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
6. Check manifold absolute pressure sensor. See MANIFOLD ABSOLUTE PRESSURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
7. Check idle air control motor operation. See IDLE AIR CONTROL MOTOR under IDLE CONTROL SYSTEMS in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.
8. Check inlet air temperature sensor. See INLET AIR TEMPERATURE SENSOR under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - CARAVAN, TOWN & COUNTRY, & VOYAGER article.

Intermittent Simulation

To reproduce the conditions creating an intermittent fault, use the following methods

1. Lightly vibrate component.
2. Heat component.
3. Wiggle or bend wiring harness.
4. Spray component with water.
5. Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while simulating intermittent. If engine is running, monitor for DTCs. Use test results to identify a faulty component or circuit.