Chrysler Voyager. Manual — part 24

TEST

ACTION

APPLICABILITY

10

Turn the ignition off.
Disconnect the Fuel Injector harness connector.
Ignition on, engine not running.
NOTE: When a Misfire is detected for a particular cylinder, the PCM will
shut down that cylinders Injector Control circuit.
With the DRBIII

t, erase DTCs.

Using a 12-volt test light connected to 12-volts, probe the Injector Control circuit.
With the DRBIII

t, actuate the Fuel Injector.

Does the test light blink/flicker?

All

Yes

→ Replace the Fuel Injector.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 11

11

Turn the ignition off.
Disconnect the Fuel Injector harness connector.
Disconnect the PCM harness connectors.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Check the Injector Control circuit for an open, short to ground, and short to voltage.
Was a problem found with the Injector Control circuit?

All

Yes

→ Repair the excessive resistance or short in the Injector Control

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 17

12

Turn the ignition off.
Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Raise vehicle on hoist, and disconnect the fuel pressure line at the fuel pump module.
Install special tool #6539 (5/16

9) fuel line adapter fuel pressure gauge between the

fuel supply line and the fuel pump module.
Ignition on, engine not running.
With the DRBIII

t, actuate the ASD Fuel System test and observe the fuel pressure

gauge.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Is the fuel pressure within specification?

All

Yes

→ Repair or replace fuel supply line as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 13

13

Turn the ignition off.
Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose,fitting or line, the fuel
system pressure must be released.
Remove the Fuel Pump Module and inspect the Fuel Inlet Strainer.
Is the Fuel Inlet Strainer plugged?

All

Yes

→ Replace the Fuel Pump Inlet Strainer.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Test Complete.

95

DRIVEABILITY - SBEC

P0300-MULTIPLE CYLINDER MIS-FIRE —

Continued

TEST

ACTION

APPLICABILITY

14

Turn the ignition off.
Remove the ignition wire.
Measure the resistance of the ignition wire.
Is the resistance below 10K ohms?

All

Yes

→ Go To 15

No

→ Replace the Ignition Wire.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

15

Turn the ignition off.
Disconnect the Ignition Coil harness connector.
Remove the Fuel Pump Relay or ASD Relay.
Using a 12-volt test light connected to 12-volts, probe the Ignition Coil Control
circuit.
Crank the engine for 5 seconds while observing the test light.
NOTE: The primary resistance of the 4.7L Ignition coil is 0.6 to 0.9 of an ohm
and the resistance of a 5.7L Ignition coil is 0.558 to 0.682 of an ohm at 77°F
(25°C).
Does the test light brightly blink/flicker?

All

Yes

→ Replace the Ignition Coil.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 16

16

Turn the ignition off.
Disconnect the Ignition Coil harness connector.
Disconnect the PCM harness connectors.
Check the Coil Control circuit for an open, short to ground, and short to voltage.
Was a problem found with the Coil Control circuit?

All

Yes

→ Repair the Coil Control circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 17

17

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

96

DRIVEABILITY - SBEC

P0300-MULTIPLE CYLINDER MIS-FIRE —

Continued

Symptom:

P0320-NO CRANK REFERENCE SIGNAL AT PCM

When Monitored and Set Condition:

P0320-NO CRANK REFERENCE SIGNAL AT PCM

When Monitored:

Engine cranking. Battery voltage greater than 10.4 volts.

Set Condition:

No CKP signal is present during engine cranking, and at least 8 camshaft

position sensor signals have occurred.

POSSIBLE CAUSES

INTERMITTENT CKP SIGNAL

INTERMITTENT CMP SIGNAL

INTERMITTENT WIRING

INTERMITTENT CONDITION

(F888) 8-VOLT SUPPLY CIRCUIT OPEN

(F888) 8-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

(F888) 8-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

(K24) CKP SENSOR SIGNAL CIRCUIT OPEN

(K24) CKP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

(K24) CKP SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

(K24) CKP SENSOR SIGNAL SHORTED TO (F888) 8-VOLT SUPPLY CIRCUIT

(K900) SENSOR GROUND CIRCUIT OPEN

PCM

CRANKSHAFT POSITION SENSOR

TEST

ACTION

APPLICABILITY

1

Ignition on, engine not running.
With the DRBIII

t, read DTCs and record the related Freeze Frame data.

With the DRBIII

t, read the Current CKP State while cranking the engine.

Does the DRBIII

t display Current CKP State Present while cranking the engine?

All

Yes

→ Go To 2

No

→ Go To 6

97

DRIVEABILITY - SBEC

TEST

ACTION

APPLICABILITY

2

NOTE: The following tests may help in identifying a possible intermittent
condition with the Crank Sensor or its related wire harness.
Ignition on, engine not running.
With the DRBIII

t as a Dual Channel Lab Scope and the Miller special tool #6801,

backprobe the (K24) CKP Signal circuit in the Crank Sensor connector and the PCM
harness connector.
Wiggle the related wire harness and connections.
Monitor the lab scope screen.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Lightly tap on the Crank Sensor and wiggle the CKP Sensor connector and the
related wire harness.
Observe the lab scope screen.
Look for any erratic pulses generated by the CKP Sensor.
Did the CKP Sensor generate any erratic pulses?

All

Yes

→ Carefully inspect the wire harness and connections, repair as

necessary, if ok, replace the Crank Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 3

3

Turn the ignition off.
With the DRBIII

t lab scope probe and the Miller special tool #6801, back probe the

Camshaft Position (CMP) Sensor Signal circuit in the PCM harness connector.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Turn the ignition on. (do not start or crank the engine)
Observe the lab scope screen.
Look for any pulses generated by the CMP Sensor.
Did the CMP Sensor generate any pulses?

All

Yes

→ Replace the Camshaft Position Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 4

4

Turn the ignition off.
With the DRBIII

t lab scope probe and the Miller special tool #6801, backprobe the

CKP Signal circuit in the PCM harness connector.
WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
Start the engine.
Observe the lab scope screen while wiggling the wiring harness and connectors.
Were there any irregularities in the lab scope pattern?

All

Yes

→ Check the harness connectors carefully. If OK, replace the Crank-

shaft Position Sensor.
Perform POWERTRAIN VERIFICATION TEST VER - 5.

No

→ Go To 5

98

DRIVEABILITY - SBEC

P0320-NO CRANK REFERENCE SIGNAL AT PCM —

Continued