engine CHRYSLER VOYAGER 2000 Diagnostic Manual

Symptom:
P-1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
When Monitored and Set Condition:
P-1388 AUTO SHUTDOWN RELAY CONTROL CIRCUIT
When Monitored: With ignition key on and battery voltage greater than 10 volts.
Set Condition:
POSSIBLE CAUSES
FUSED B(+) CIRCUIT OPEN
AUTO SHUTDOWN RELAY RESISTANCE>=100.0 OHMS
ASD RELAY CONTROL CIRCUIT WIRING HARNESS INTER DEF
ASD RELAY CONTROL CIRCUIT WIRING HARNESS OBSER DEF
AUTO SHUTDOWN RELAY CONTROL CIRCUIT OPEN
AUTO SHUTDOWN RELAY CONTROL CIRCUIT SHORT TO GROUND
PCM DEFECTIVE (AUTO SHUTDOWN RELAY CONTROL CIRCUIT)
TEST ACTION APPLICABILITY
1 Ignition on, Engine Not Running
The ASD Relay is referred to as the Low Pressure Shutoff Relay in CNG
applications.
With the DRB, actuate the Auto Shutdown Relay.
Is the ASD Relay clicking?All
Ye s®Go To 2
No®Go To 4
2 Engine running.
Wiggle the Wiring Harness from the ASD Relay to the PCM.
Did the engine die out when wiggling wires?All
Ye s®Repair circuit as necessary where wiggling caused the engine to
die out.
Perform Powertrain Verification Test VER-2A.
No®Go To 3
3 Ignition Off
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
186
DRIVEABILITY
ProCarManuals.com

Symptom:
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM
When Monitored and Set Condition:
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM
When Monitored: With ignition key on and battery voltage greater than 10 volts.
Set Condition: Engine running and no ASD Relay Output Sense at PCM.
POSSIBLE CAUSES
FUSED B(+) CIRCUIT OPEN
ASD RELAY DEFECTIVE
ASD RELAY OUT CKT WIRING HARNESS OBSERVABLE DEFECT
ASD RELAY OUTPUT CIRCUIT OPEN (ENGINE STARTED)
ASD RELAY OUTPUT CKT OPEN (ENGINE DID NOT START)
ASD RLY OUT CKT WIRING HARNESS INTERMITTENT DEFECT
PCM DEFECTIVE (ENGINE DID NOT START)
PCM DEFECTIVE (ENGINE STARTED)
TEST ACTION APPLICABILITY
1 Ignition off.
Is a Trouble Code also set for9ASD Relay Control Circuit?All
Ye s®Refer to symptom P-1388 AUTO SHUTDOWN RELAY CON-
TROL CIRCUIT in the DRIVEABILITY category.
No®Go To 2
2 Ignition on with engine not running.
With the DRB, read Trouble Codes.
Attempt to start the engine and let idle.
Is the Global Good Trip displayed and equal to 0?All
Ye s®Go To 3
No®Go To 10
3 Ignition off.
Attempt to start the engine.
Did the engine start?All
Ye s®Go To 4
No®Go To 6
188
DRIVEABILITY
ProCarManuals.com

TEST ACTION APPLICABILITY
4 Ignition Off
Disconnect the PCM Connector.
Note: Check connectors - Clean/repair as necessary.
Remove the Auto Shutdown Relay.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the resistance of the ASD Relay Output Circuit from
ASD Relay to the PCM Connector.
Is the resistance above 5.0 ohms?All
Ye s®Repair open ASD Relay Output Circuit.
Perform Powertrain Verification Test VER-2A.
No®Go To 5
5 Ignition off.
If there are no potential causes remaining, the Powertrain Control Module is
assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-2A.
6 Ignition Off
Remove the Auto Shutdown Relay.
Note: Check connectors - Clean/repair as necessary.
Using a Voltmeter, measure the Fused B (+) Circuit at Relay Connector.
Is the voltage above 10.0 volts?All
Ye s®Go To 7
No®Repair the open Fused B(+) Circuit. (Check Engine Fuse in PDC)
.
Perform Powertrain Verification Test VER-2A.
7 Ignition Off
Remove the Auto Shutdown Relay.
Note: Check connectors - Clean/repair as necessary.
Install a substitute Relay for the Auto Shutdown Relay.
Attempt to start the Vehicle.
Did the engine start?All
Ye s®Replace the original Auto Shutdown Relay.
Perform Powertrain Verification Test VER-2A.
No®Go To 8
8 Ignition Off.
Disconnect the Powertrain Control Module Connector.
Note: Check connectors - Clean/repair as necessary.
Remove the Auto Shutdown Relay.
Note: Check connectors - Clean/repair as necessary.
Using an ohmmeter, measure the resistance of the ASD Relay Output Circuit from
the Auto Shutdown Relay to the PCM.
Is the resistance above 5.0 ohms?All
Ye s®Repair open ASD Relay Output Circuit.
Perform Powertrain Verification Test VER-2A.
No®Go To 9
189
DRIVEABILITY
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM ÐContinued
ProCarManuals.com

TEST ACTION APPLICABILITY
9 Ignition off.
If there are no potential causes remaining, the Powertrain Control Module is
assumed to be defective.
View repair options.All
Repair
Replace the PCM.
Perform Powertrain Verification Test VER-2A.
10 Ignition off.
Using the schematic as a guide, inspect the Wiring and Connectors.
Were any problems found?All
Ye s®Repair as necessary.
Perform Powertrain Verification Test VER-2A.
No®Go To 11
11 Start Engine.
Note: The Engine must be running before continuing test.
Wiggle Wiring Harness from ASD Relay to the Powertrain Control Module.
With the DRB, read Trouble Codes.
Did trouble code9No ASD Relay Output Voltage at PCM9reset?All
Ye s®Repair as necessary where wiggling caused the Trouble Code to be
set.
Perform Powertrain Verification Test VER-2A.
No®Test Complete.
190
DRIVEABILITY
P-1389 NO ASD RELAY OUTPUT VOLTAGE AT PCM ÐContinued
ProCarManuals.com

Symptom:
P-1391 INTERMITTENT LOSS OF CMP OR CKP
When Monitored and Set Condition:
P-1391 INTERMITTENT LOSS OF CMP OR CKP
When Monitored: Engine running over 7 seconds.
Set Condition: When the expected cam signal level disagrees with the actual cam signal
level.
POSSIBLE CAUSES
CKP SENSOR CKT WIRING HARNESS INTER DEF
CMP SENSOR SIGNAL CKT WIRING HARNESS INTER DEF
CAMSHAFT POSITION SENSOR DEFECTIVE
CAMSHAFT SPROCKET DEFECTIVE
CRANKSHAFT DEFECTIVE
CRANKSHAFT POSITION SENSOR DEFECTIVE
DISTRIBUTOR PULSE RING DEFECTIVE
FLYWHEEL DEFECTIVE
CAMSHAFT TARGET MAGNET DEFECTIVE
CAMSHAFT THRUST PLATES(S) NOT ATTACHED
CKP SENSOR CONNECTOR TERMINALS OBS DEF
CKP SENSOR CONNECTOR TERMINALS OBS DEFECT
PCM CONN TERMINALS OBS DEF (CKP SENSOR)
PCM CONN TERMINALS OBS DEF (CMP SENSOR)
CAMSHAFT/CYLINDER HEAD DEFECTIVE
TEST ACTION APPLICABILITY
1 Ignition Off.
At the CMP Sensor, backprobe the CMP Sensor Signal Circuit with the Oscilloscope
voltage measurement lead.
Start the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope.
Are there any of the Camshaft Position Sensor Signals missing?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Go To 2
No®Go To 6
191
DRIVEABILITY
ProCarManuals.com

TEST ACTION APPLICABILITY
2 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 3
3 Ignition Off.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out, or miswired?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 4
4 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Remove the Camshaft Position Sensor.
Inspect the Camshaft Sprocket. See pertinent service information for instructions.
Is the Camshaft Sprocket okay?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Go To 5
No®Repair as necessary.
Perform Powertrain Verification Test VER-5A.
5 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Remove the CMP Sensor.
Inspect the Camshaft Thrust Plate(s).
Are the Camshaft Thrust Plate(s) attached?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Replace the Camshaft Position Sensor.
Perform Powertrain Verification Test VER-5A.
No®Repair or replace the Camshaft Thrust Plate(s) as necessary.
Perform Powertrain Verification Test VER-5A.
6 Start Engine.
At PCM, backprobe CMP Sensor Signal Circuit with Oscilloscope's voltage measure-
ment lead.
While observing the Oscilloscope pattern, wiggle CMP Sensor Circuit from Sensor to
PCM.
Were any signals missing when the wiggle test was conducted?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Note where wiggling the Wires caused a missing CMP Sensor
Signal. Repair Camshaft and Crankshaft Wiring Harness as
necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 7
192
DRIVEABILITY
P-1391 INTERMITTENT LOSS OF CMP OR CKP ÐContinued
ProCarManuals.com

TEST ACTION APPLICABILITY
7 Ignition Off.
At the CKP Sensor, backprobe the CKP Sensor Signal Circuit with the Oscilloscope's
voltage measurement lead.
Start the Engine and observe the CKP Sensor voltage pattern on the Oscilloscope.
Are any Crankshaft Position Sensor Signals missing?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Go To 8
No®Go To 11
8 Ignition Off.
Disconnect the CKP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 9
9 Ignition Off.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 10
10 Ignition Off
Remove the Crankshaft Position (CKP) Sensor.
Inspect the Slots in the Flywheel for debris or damage.
Is the Flywheel damaged?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Repair or replace as necessary.
Perform Powertrain Verification Test VER-5A.
No®Replace the Crankshaft Position Sensor.
Perform Powertrain Verification Test VER-5A.
11 Start Engine.
At PCM, backprobe CKP Sensor Signal Circuit with Oscilloscope's voltage measure-
ment lead.
While observing the Oscilloscope pattern, wiggle CKP Sensor Circuit from Sensor to
PCM.
Were any CKP Sensor Signals missing when the wiggle test was conducted?ENGINE - 3.3L V6
and/or ENGINE -
3.8L V6 and/or EN-
GINE - 3.3L V6
FFV
Ye s®Note where wiggling the wires caused a missing CKP Sensor
signal. Repair Camshaft and Crankshaft Wire Harness as neces-
sary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
193
DRIVEABILITY
P-1391 INTERMITTENT LOSS OF CMP OR CKP ÐContinued
ProCarManuals.com

TEST ACTION APPLICABILITY
12 Ignition Off.
At the CMP Sensor, backprobe the CMP Sensor Signal Circuit with the Oscilloscope
voltage measurement lead.
Start the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope.
Are there any of the Camshaft Position Sensor Signals missing?ENGINE - 3.0L V6
Ye s®Go To 13
No®Go To 16
13 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.0L V6
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 14
14 Ignition Off.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out, or miswired?ENGINE - 3.0L V6
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 15
15 Ignition Off.
Remove Distributor Cap and Rotor.
Inspect the Pulse Ring for damage or misalignment.
Is the Pulse Ring okay?ENGINE - 3.0L V6
Ye s®Replace the Camshaft Position Sensor.
Perform Powertrain Verification Test VER-5A.
No®Repair or replace the Distributor Pulse Ring as necessary.
Perform Powertrain Verification Test VER-5A.
16 Start Engine.
At PCM, backprobe CMP Sensor Signal Circuit with Oscilloscope's voltage measure-
ment lead.
While observing the Oscilloscope pattern, wiggle CMP Sensor Circuit from Sensor to
PCM.
Were any signals missing when the wiggle test was conducted?ENGINE - 3.0L V6
Ye s®Note where wiggling the Wires caused a missing CMP Sensor
Signal. Repair Camshaft and Crankshaft Wiring Harness as
necessary.
Perform Powertrain Verification Test VER-5A.
No®Go To 17
194
DRIVEABILITY
P-1391 INTERMITTENT LOSS OF CMP OR CKP ÐContinued
ProCarManuals.com

TEST ACTION APPLICABILITY
17 Ignition Off.
At the CKP Sensor, backprobe the CKP Sensor Signal Circuit with the Oscilloscope's
voltage measurement lead.
Start the Engine and observe the CKP Sensor voltage pattern on the Oscilloscope.
Are any Crankshaft Position Sensor Signals missing?ENGINE - 3.0L V6
Ye s®Go To 18
No®Go To 21
18 Ignition Off.
Disconnect the CKP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.0L V6
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 19
19 Ignition Off.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 3.0L V6
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 20
20 Ignition Off.
Remove the Crankshaft Position (CKP) Sensor.
Inspect the Slots in the Flywheel for debris or damage.
Is the Flywheel damaged?ENGINE - 3.0L V6
Ye s®Repair or replace as necessary.
Perform Powertrain Verification Test VER-5A.
No®Replace the Crankshaft Position Sensor.
Perform Powertrain Verification Test VER-5A.
21 Start Engine.
At PCM, backprobe CKP Sensor Signal Circuit with Oscilloscope's voltage measure-
ment lead.
While observing the Oscilloscope pattern, wiggle CKP Sensor Circuit from Sensor to
PCM.
Were any CKP Sensor Signals missing when the wiggle test was conducted?ENGINE - 3.0L V6
Ye s®Note where wiggling the wires caused a missing CKP Sensor
signal. Repair Camshaft and Crankshaft Wire Harness as neces-
sary.
Perform Powertrain Verification Test VER-5A.
No®Test Complete.
195
DRIVEABILITY
P-1391 INTERMITTENT LOSS OF CMP OR CKP ÐContinued
ProCarManuals.com

TEST ACTION APPLICABILITY
22 Ignition Off.
At the CMP Sensor, backprobe the CMP Sensor Signal Circuit with the Oscilloscope
voltage measurement lead.
Start the Engine and observe the CMP Sensor voltage pattern on the Oscilloscope.
Are there any of the Camshaft Position Sensor Signals missing?ENGINE - 2.0L
and 2.4L I-4
DOHC
Ye s®Go To 23
No®Go To 27
23 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out or miswired?ENGINE - 2.0L
and 2.4L I-4
DOHC
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 24
24 Ignition Off.
Disconnect the PCM.
Note: Check connectors - Clean/repair as necessary.
Inspect all Terminals.
Is any Terminal damaged, pushed out, or miswired?ENGINE - 2.0L
and 2.4L I-4
DOHC
Ye s®Repair Terminal(s) for damage, pushout or miswiring.
Perform Powertrain Verification Test VER-5A.
No®Go To 25
25 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Remove & inspect the CMP Sensor & Target Magnet for damage or misalignment.
Is the Camshaft Target Magnet okay?ENGINE - 2.0L
and 2.4L I-4
DOHC
Ye s®Go To 26
No®Repair or replace Camshaft Target Magnet as necessary.
Perform Powertrain Verification Test VER-5A.
26 Ignition Off.
Disconnect the CMP Sensor Connector.
Note: Check connectors - Clean/repair as necessary.
Remove and inspect the CMP Sensor and Target Magnet for damage or mis-
alignment.
Check Camshaft endplay per pertinent service information.
Is the Camshaft endplay within specs?ENGINE - 2.0L
and 2.4L I-4
DOHC
Ye s®Replace the Camshaft Position Sensor.
Perform Powertrain Verification Test VER-5A.
No®Repair or replace Camshaft/Cylinder Head as necessary.
Perform Verification Test VER-5A.
196
DRIVEABILITY
P-1391 INTERMITTENT LOSS OF CMP OR CKP ÐContinued
ProCarManuals.com