Chrysler Town, Dodge Caravan. Manual — part 920

Symptom:

LEFT B-PILLAR SWITCH INPUT SHORT

When Monitored and Set Condition:

LEFT B-PILLAR SWITCH INPUT SHORT

When Monitored:

Continuously when the BCM is awake.

Set Condition:

When the BCM senses a B-pillar switch input less than .24 volts for over

10 seconds.

POSSIBLE CAUSES

DTC PRESENT

LEFT B-PILLAR SWITCH SHORTED

LEFT SLIDING DOOR PILLAR SWITCH MUX WIRE SHORT TO GROUND

BODY CONTROL MODULE - LEFT SLIDING DOOR PILLAR SWITCH CIRCUIT SHORTED

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, record and erase DTC’s.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the left power sliding door from the Left B-Pillar Switch.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display LEFT B-PILLAR SWITCH INPUT SHORT?

All

Yes

→ Go To 2

No

→ Using the wiring diagram/schematic as a guide, inspect the

wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.

2

Disconnect the Left B-Pillar Switch connector.
With the DRBIII

t, erase DTCs.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Wait 10 seconds.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display LEFT B-PILLAR SWITCH INPUT OPEN?

All

Yes

→ Replace the B-Pillar Switch.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Disconnect the Body Control Module C3 connector.
Disconnect the Left B-Pillar Switch connector.
Measure the resistance of the Left Sliding Door Pillar Switch Mux circuit to ground.
Is the resistance below 1000.0 ohms?

All

Yes

→ Repair the Left Sliding Door Pillar Switch Mux wire for a short to

ground.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Body Control Module.

Perform BODY VERIFICATION TEST - VER 1.

916

POWER DOORS - SLIDING

Symptom:

LEFT B-PILLAR SWITCH INPUT STUCK

When Monitored and Set Condition:

LEFT B-PILLAR SWITCH INPUT STUCK

When Monitored:

Continuously when the BCM is awake.

Set Condition:

When the BCM senses an active B-pillar switch input for over 10 seconds.

POSSIBLE CAUSES

DTC PRESENT

LEFT B-PILLAR SWITCH SHORTED

LEFT SLIDING DOOR PILLAR SWITCH MUX WIRE SHORT TO GROUND

BODY CONTROL MODULE - LEFT SLIDING DOOR PILLAR SWITCH CIRCUIT SHORTED

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, record and erase DTC’s.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the left power sliding door from the Left B-Pillar Switch.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display LEFT B-PILLAR SWITCH INPUT STUCK?

All

Yes

→ Go To 2

No

→ Using the wiring diagram/schematic as a guide, inspect the

wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.

2

Disconnect the Left B-Pillar Switch connector.
With the DRBIII

t, erase DTCs.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Wait 10 seconds.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display LEFT B-PILLAR SWITCH INPUT OPEN?

All

Yes

→ Replace the B-Pillar Switch.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Disconnect the Body Control Module C3 connector.
Disconnect the Left B-Pillar Switch connector.
Measure the resistance of the Left Sliding Door Pillar Switch Mux circuit to ground.
Is the resistance below 10000.0 ohms?

All

Yes

→ Repair the Left Sliding Door Pillar Switch Mux wire for a short to

ground.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Body Control Module.

Perform BODY VERIFICATION TEST - VER 1.

917

POWER DOORS - SLIDING

Symptom:

LOOPBACK TEST FAILURE

When Monitored and Set Condition:

LOOPBACK TEST FAILURE

When Monitored:

Anytime the Power Sliding Door Module is awake.

Set Condition:

The Power Sliding Door Module did not receive its own transmitted

message on the PCI bus back (loopback) for longer than 1 second.

POSSIBLE CAUSES

DTC PRESENT

POWER SLIDING DOOR MODULE

TEST

ACTION

APPLICABILITY

1

With the DRBIII

t, record and erase DTC’s.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Operate the power sliding door several times from stop to stop if possible.
With the DRBIII

t, read ACTIVE DTCs.

Does the DRBIII

t display LOOPBACK TEST FAILURE?

All

Yes

→ Replace the Power Sliding Door Module.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Using the wiring diagram/schematic as a guide, inspect the

wiring and connectors for an intermittent condition. Operate the
door several times and check for any binding conditions.
Perform BODY VERIFICATION TEST - VER 1.

918

POWER DOORS - SLIDING

Symptom:

LOSS OF BCM MESSAGES

When Monitored and Set Condition:

LOSS OF BCM MESSAGES

When Monitored:

Whenever the ignition is on.

Set Condition:

If the PSD Module losses communication with the BCM for over 5 seconds,

this code will set.

POSSIBLE CAUSES

ATTEMPT TO COMMUNICATE WITH THE BODY CONTROL MODULE

POWER SLIDING DOOR MODULE - LOSS OF BCM MESSAGES

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, enter Body then Body Computer.

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).

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 Power Sliding Door Module.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Test Complete.

919

POWER DOORS - SLIDING