Chrysler Pacifica. Manual - part 172

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Reconnect the IPM C9 harness connector.
Reconnect the BCM C2 harness connector.
Install proper rated fuse to IPM Fuse #30.
Turn the ignition the

9RUN/ON9 for approximately 15 seconds.

Turn the ignition off.
Remove and inspect IPM Fuse #30.
Is the IPM Fuse #30 open?

All

Yes

→ Replace the BCM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ Go To 9

Turn the ignition off.
Reconnect the SKREEM harness connector.
Turn the ignition on for approximately 15 seconds.
Turn the ignition off.
Remove and inspect IPM Fuse #30.
Is IPM Fuse #30 open?

All

Yes

→ Replace the SKREEM in accordance with the Service Informa-

tion.
Perform BODY VERIFICATION TEST - VER 1.

→ The condition is not present at this time. Monitor DRBIIIt

parameters while wiggling the related wire harness. Refer to any
Technical Service Bulletins (TSB) that may apply. Visually in-
spect the related wiring harness connectors and terminals.
Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
While back probing, measure the voltage of the Fused B(+) circuit in the Ignition
Switch harness connector.
Is the voltage above 10.5 volts?

All

Yes

→ Go To 11

→ Go To 14

Turn the ignition off.
Remove IPM Fuel Pump Relay.
Remove IPM Starter Relay.
Reconnect the Ignition Switch harness connector.
Turn the ignition to the Run-Start position and hold while back probing.
While back probing, measure the voltage at the Ignition Switch harness connector
terminal 3.
Is the voltage below 10.5 volts?

All

Yes

→ Replace the Ignition Switch in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

→ Go To 12

685

IGNITION, POWER, ACCESSORY

IGNITION RUN/START INPUT MISMATCH - IPM —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the IPM C9 harness connector.
Disconnect the Ignition Switch harness connector.
Measure the resistance of the Ignition Switch Output (Run-Start) circuit between the
IPM C9 connector and the Ignition Switch connector.
Is the resistance above 5.0 ohms?

All

Yes

→ Repair the Ignition Switch Output (Run-Start) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

→ Go To 13

Turn the ignition off.
Disconnect the IPM C9 harness connector.
Remove the IPM Fuel Pump Relay.
Using the wiring diagram/schematic as a guide, measure the IPM internal resistance
between the C9 terminal pin 13 to the Fuel Pump Relay.
Is the resistance above 5.0 ohms?

All

Yes

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ The condition is not present at this time. Monitor DRBIIIt

Turn the ignition off.
Disconnect the IPM C9 harness connector.
Disconnect the Ignition Switch harness connector.
Measure the resistance of the Fused B(+) circuit between the IPM C9 connector and
the Ignition Switch connector.
Is the resistance above 5.0 ohms?

All

Yes

→ Repair the Fused B(+) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

686

IGNITION, POWER, ACCESSORY

IGNITION RUN/START INPUT MISMATCH - IPM —

Continued

Symptom:

IGNITION START INPUT MISMATCH - IPM

When Monitored and Set Condition:

IGNITION START INPUT MISMATCH - IPM

When Monitored:

When the IPM is powered up.

Set Condition:

The IPM internal sense detects the hardwire Ignition Switch I/O =

9OFF9

and the Ignition State in Monitors =

9Start9 (BCM Ignition Switch MUX-based PCI bus

data) for 5 seconds.

POSSIBLE CAUSES

IGNITION SWITCH OUTPUT (START) CIRCUIT SHORT TO GROUND - IPM

INTERMITTENT CONDITION

IGNITION SWITCH OUTPUT (START) CIRCUIT SHORT TO GROUND - PCM

IGNITION SWITCH OUTPUT (START) CIRCUIT OPEN

IGNITION SWITCH

IPM INTERNAL OPEN

IPM INTERNAL SHORT

TEST

ACTION

APPLICABILITY

NOTE: Diagnose and repair any BCM Ignition MUX or IPM Ignition Run-
Start Mismatch DTC’s before proceeding with this test.
Turn the ignition off.
Remove and inspect Fuse #30 in the IPM.
If fuse is open, replace with proper rated fuse.
Remove the Starter Relay from the IPM.
Turn the ignition to the Start position for at least 5 seconds.
Turn the ignition off.
Remove and inspect Fuse #30 in the IPM.
Is IPM Fuse #30 open?

All

Yes

→ Go To 2

→ Go To 5

Turn the ignition off.
Disconnect the IPM harness C4 connector.
Disconnect the Ignition Switch harness connector.
Measure the resistance between ground and the Ignition Switch Output (Start)
circuit.
Is the resistance below 5 ohms?

All

Yes

→ Repair the Ignition Switch Output (Start) circuit for a short to

ground between the IPM and the Ignition Switch.
Perform BODY VERIFICATION TEST - VER 1.

→ Go To 3

687

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the IPM C7 harness connector.
Disconnect the PCM harness connector.
Measure the resistance between ground and the Ignition Switch Output (Start)
circuit between the IPM and the PCM.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the Ignition Switch Output (Start) circuit for a short to

ground between the IPM and the PCM.
Perform BODY VERIFICATION TEST - VER 1.

→ Go To 4

Turn the ignition off.
Reconnect the Ignition Switch harness connector.
Reconnect the IPM C4 harness connector.
Install proper rated fuse to IPM Fuse #30.
Turn the ignition to the Start position for at least 5 seconds.
With the DRBIII

t, read DTCs.

Did this DTC reset?

All

Yes

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ The condition is not present at this time. Monitor DRBIIIt

parameters while wiggling the related wire harness. Refer to any
Technical Service Bulletins (TSB) that may apply. Visually in-
spect the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the IPM C4 harness connector.
Measure the voltage of the Ignition Switch Output (Start) circuit while holding the
Ignition Switch in the Start position.
Is the voltage above 10.5 volts?

All

Yes

→ Replace the IPM in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ Go To 6

Turn the ignition off.
Disconnect the IPM C4 harness connector.
Disconnect the Ignition Switch harness connector.
Measure the resistance of the Ignition Switch Output (Start) circuit between the IPM
C4 connector and the Ignition Switch connector.
Is the resistance above 5.0 ohms?

All

Yes

→ Repair the Ignition Switch Output (Start) circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

→ Go To 7

688

IGNITION, POWER, ACCESSORY

IGNITION START INPUT MISMATCH - IPM —

Continued

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