Chrysler Pacifica. Manual — part 85

Symptom:

BCM MESSAGES NOT RECEIVED

When Monitored and Set Condition:

BCM MESSAGES NOT RECEIVED

When Monitored:

With the ignition in run or run/start and vehicle not in shipping mode.

Set Condition:

The module does not receive any messages from the BCM. Time to mature

for the DDM, IPM and PDM is 5 seconds.

POSSIBLE CAUSES

ATTEMPT TO COMMUNICATE WITH THE BCM

MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, attempt to communicate with the Body Control Module.

Was the DRBIII

t able to I/D or communicate with the BCM?

All

Yes

→ Go To 2

No

→ Refer to the Communication category for the related symptom(s).

Perform BODY VERIFICATION TEST - VER 1.

2

With the DRBIII

t, erase DTC’s.

Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII

t, read DTC’s.

Did this DTC reset?

All

Yes

→ Replace the module which set the DTC in accordance with the

service information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Test Complete.

337

COMMUNICATION

Symptom:

CMTC MESSAGE MISMATCH

When Monitored and Set Condition:

CMTC MESSAGE MISMATCH

When Monitored:

With the ignition on.

Set Condition:

BCM has learned EC Mirror but the vehicle is Not equipped with EC

Mirror. Time to mature for the BCM is 5 seconds.

POSSIBLE CAUSES

INTERMITTENT CONDITION

CMTC COMMUNICATION

CMTC MODULE

BODY CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

NOTE: All communication DTC(s) that may have set along with this DTC
must be diagnosed before continuing.
With the DRBIII

t, erase the DTC.

Cycle the ignition on and off several times, leaving the ignition on for at least 15
seconds.
With the DRBIII

t, read DTCs.

Did this DTC reset?

All

Yes

→ Go To 2

No

→ Go To 4

2

Turn the ignition on.
With the DRBIII

t, attempt to communicate with the CMTC Module.

Can communication be established with the CMTC Module?

All

Yes

→ Go To 3

No

→ Refer to the Communication Category and perform the appropri-

ate symptom.
Perform BODY VERIFICATION TEST - VER 1.

338

COMMUNICATION

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Install a substitute CMTC Module in place of the original module.
With the DRBIII

t, erase DTCs.

Turn the ignition on.
Cycle the ignition on and off, leaving the ignition in the on position for at least 15
seconds each time.
With the DRBIII

t, read DTCs.

Did this DTC reset?

All

Yes

→ Replace the Body Control Module in accordance with the service

information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the CMTC Module in accordance with the service infor-

mation.
Perform BODY VERIFICATION TEST - VER 1.

4

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.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→ Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Test Complete.

339

COMMUNICATION

CMTC MESSAGE MISMATCH —

Continued

Symptom:

CMTC MESSAGES NOT RECEIVED

When Monitored and Set Condition:

CMTC MESSAGES NOT RECEIVED

When Monitored:

With the ignition in run.

Set Condition:

The module does not receive any messages from the CMTC. Time to

mature for the BCM, DDM and PDM is 5 seconds. Time to mature for the IPM is 10
seconds.

POSSIBLE CAUSES

ATTEMPT TO COMMUNICATE WITH THE CMTC

MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, attempt to communicate with the CMTC.

Was the DRBIII

t able to I/D or communicate with the CMTC?

All

Yes

→ Go To 2

No

→ Refer to the Communication category for the related symptom(s).

Perform BODY VERIFICATION TEST - VER 1.

2

With the DRBIII

t, erase DTC’s.

Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII

t, read DTC’s.

Did this DTC reset?

All

Yes

→ Replace the module which set the DTC in accordance with the

service information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Test Complete.

340

COMMUNICATION