Chrysler Pacifica. Manual — part 97

TEST

ACTION

APPLICABILITY

4

Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Turn the ignition off.
Disconnect the Memory/Heated Seat Adjustable Pedal Module C1 harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII

t select Pep Module Tools.

Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the Memory/Heated Seat Adjustable Pedal Module connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?

All

Yes

→ Go To 5

No

→ Repair the PCI Bus circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

5

If there are no possible causes remaining, view repair.

All

Repair

Replace the Memory/Heated Seat Adjustable Pedal Module in
accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1.

385

COMMUNICATION

*NO RESPONSE FROM MEMORY/HEATED SEAT ADJUSTABLE PEDAL
MODULE —

Continued

Symptom:

*NO RESPONSE FROM NAVIGATION MODULE

POSSIBLE CAUSES

ATTEMPT TO COMMUNICATE WITH THE INSTRUMENT CLUSTER

GROUND CIRCUIT OPEN

FUSED B(+) CIRCUIT OPEN

FUSED ACCESSORY RELAY OUTPUT CIRCUIT OPEN

OPEN PCI BUS CIRCUIT

NAVIGATION MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRB, attempt to communicate with the Instrument Cluster.
Was the DRB able to I/D or communicate with the Instrument Cluster?

All

Yes

→ Go To 2

No

→ Refer to the symptom list for problems related to no communica-

tion with the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Disconnect the Navigation Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the ground circuit.
Is the test light illuminated?

All

Yes

→ Go To 3

No

→ Repair the ground circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

3

Turn the ignition off.
Disconnect the Navigation Module harness connector.
Using a 12-volt test light connected to ground, probe the Fused B(+) circuit.
Is the test light illuminated?

All

Yes

→ Go To 4

No

→ Check IPM fuse #48 for an open. If OK, repair the Fused B+

circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.

4

Turn the ignition off.
Disconnect the Navigation Module harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Accessory Relay
Output circuit.
Is the test light illuminated?

All

Yes

→ Go To 5

No

→ Check IPM fuse #25 for an open. If OK, repair the Fused

Accessory Relay Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.

386

COMMUNICATION

TEST

ACTION

APPLICABILITY

5

Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the Navigation Module harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII

t select Pep Module Tools.

Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the Navigation Module connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?

All

Yes

→ Replace the Navigation Module in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the PCI Bus circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

387

COMMUNICATION

*NO RESPONSE FROM NAVIGATION MODULE —

Continued

Symptom:

*NO RESPONSE FROM OCCUPANT CLASSIFICATION MODULE

POSSIBLE CAUSES

FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN

GROUND CIRCUIT OPEN

PCI BUS CIRCUIT OPEN

OCCUPANT CLASSIFICATION MODULE

TEST

ACTION

APPLICABILITY

1

Ensure that the battery is fully charged.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Occupant Classification Module harness connector.
Turn the ignition on and then reconnect the Battery.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output circuit.
Is the test light illuminated?

All

Yes

→ Go To 2

No

→ Repair the Fused Ignition Switch Output circuit for an open.

Perform __AIRBAG VERIFICATION TEST - VER 1.

NOTE: When reconnecting airbag system components, the ignition must be
turned off and the battery must be disconnected.

2

Ensure that the battery is fully charged.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Occupant Classification Module harness connector.
Using a 12-volt test light connected to 12-volts, probe the ground circuit.
NOTE: Make sure test light is connected to the Battery positive terminal.
Is the test light illuminated?

All

Yes

→ Go To 3

No

→ Repair the Ground circuit for an open.

Perform __AIRBAG VERIFICATION TEST - VER 1.

When reconnecting Airbag system components, the ignition must be turned
off and the battery must be disconnected.

388

COMMUNICATION