Chrysler Voyager. Manual — part 7

Symptom:

*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC

POSSIBLE CAUSES

CHECK PCM POWERS AND GROUNDS

PCM SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE

PCM SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE

PCM SCI CIRCUITS SHORTED TOGETHER

PCM SCI TRANSMIT CIRCUIT SHORTED TO GROUND

PCM SCI RECEIVE CIRCUIT SHORTED TO GROUND

PCM SCI RECEIVE CIRCUIT OPEN

PCM SCI TRANSMIT CIRCUIT OPEN

POWERTRAIN CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Perform the symptom Checking PCM Power and Ground Circuits in the Driveability
category.
NOTE: With the DRBIII

t in the generic scan tool mode, attempt to commu-

nicate with the PCM.
NOTE: If the DRBIII

t can communicate with the PCM in the generic scan

tool mode, it may not be necessary to perform this step.
Did the vehicle pass this test?

All

Yes

→ Go To 2

No

→ Repair as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

2

Turn the ignition off.
Disconnect the DRBIII

t from the DLC.

Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the PCM SCI Transmit circuit at the Data Link harness
connector (cav 7).
Is the voltage above 1.0 volt?

All

Yes

→ Repair the PCM SCI Transmit circuit for a short to voltage.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the DRBIII

t from the DLC.

Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the PCM SCI Receive circuit at the Data Link harness
connector (cav 12).
Is the voltage above 1.0 volt?

All

Yes

→ Repair the PCM SCI Receive circuit for a short to voltage.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 4

27

COMMUNICATION

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the DRBIII

t from the DLC.

Disconnect the PCM harness connectors.
Measure the resistance between the PCM SCI Transmit circuit and the PCM SCI
Receive circuit at the Data Link harness connector (cavs 7 and 12).
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the short between the PCM SCI Transmit and the PCM

SCI Receive circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the DRBIII

t from the DLC.

Measure the resistance between ground and the PCM SCI Transmit circuit at the
Data Link harness connector (cav 7).
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the PCM SCI Transmit circuit for a short to ground.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 6

6

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII

t from the DLC.

Measure the resistance between ground and the PCM SCI Receive circuit in the Data
Link harness connector (cav 12).
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the PCM SCI Receive circuit for a short to ground.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 7

7

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII

t from the DLC.

CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the PCM SCI Receive circuit from the Data Link harness
connector (cav 12) to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 8

No

→ Repair the PCM SCI Receive circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

28

COMMUNICATION

*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC —

Continued

TEST

ACTION

APPLICABILITY

8

Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII

t from the DLC.

CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the PCM SCI Transmit circuit from the Data Link harness
connector (cav 7) to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 9

No

→ Repair the PCM SCI Transmit circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

9

If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

29

COMMUNICATION

*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC —

Continued

Symptom:

*NO RESPONSE FROM PCM (SCI ONLY) - SBEC

POSSIBLE CAUSES

CHECK PCM POWERS AND GROUNDS

SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE

TRANSMISSION CONTROL MODULE

SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE

SCI CIRCUITS SHORTED TOGETHER

SCI TRANSMIT CIRCUIT SHORTED TO GROUND

SCI RECEIVE CIRCUIT SHORTED TO GROUND

SCI RECEIVE CIRCUIT OPEN

SCI TRANSMIT CIRCUIT OPEN

POWERTRAIN CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Perform the symptom Checking PCM Power and Ground Circuits in the Driveability
category.
NOTE: With the DRBIII

t in the generic scan tool mode, attempt to commu-

nicate with the PCM.
NOTE: If the DRBIII

t can communicate with the PCM in the generic scan

tool mode, it may not be necessary to perform this step.
Did the vehicle pass this test?

All

Yes

→ Go To 2

No

→ Repair as necessary.

Perform POWERTRAIN VERIFICATION TEST VER - 1.

2

Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance between ground and the SCI Transmit (PCM) circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

No

→ Go To 4

3

Turn the ignition off.
Disconnect the TCM harness connector (if equipped).
NOTE: If vehicle is not equipped with a TCM, answer yes to the question.
Measure the resistance between ground and the SCI Transmit (PCM) circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the SCI Transmit (PCM) circuit for a short to ground.

Perform POWERTRAIN VERIFICATION TEST VER - 1.

No

→ Replace the Transmission Control Module in accordance with the

service information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.

30

COMMUNICATION