Chrysler Voyager. Manual — part 113

Symptom:

P1602-PCM NOT PROGRAMMED

When Monitored and Set Condition:

P1602-PCM NOT PROGRAMMED

When Monitored:

Ignition on.

Set Condition:

The PCM has not been programmed.

POSSIBLE CAUSES

PCM NOT PROGRAMMED

VERIFY PCM PROGRAMMING

PCM

TEST

ACTION

APPLICABILITY

1

Ignition on, engine not running.
With the DRBIII

t, erase DTCs.

With the DRBIII

t program the PCM.

Start the engine.
Allow the engine to reach normal operating temperature.
With the DRBIII

t, read DTCs.

Does the DTC reset?

All

Yes

→ Go To 2

No

→ The PCM has been successfully programmed. Test is complete.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

2

NOTE: The ignition switch must be left in the off position for a minimum of
10 seconds.
Cycle the ignition switch to the off position and then back to run.
Attempt to program the PCM.
Start the vehicle and allow it to reach normal operating temperatures.
With the DRBIII

t, read DTCs.

Does the DTC reset?

All

Yes

→ Replace and program the Powertrain Control Module in accor-

dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ The PCM has been successfully programmed into the PCM. Test

is complete.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

451

DRIVEABILITY - NGC

Symptom List:

P1603-PCM INTERNAL DUAL-PORT RAM COMMUNICATION
P1604-PCM INTERNAL DUAL-PORT RAM READ/WRITE INTEG-
RITY FAILURE
P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P1603-PCM INTERNAL DUAL-
PORT RAM COMMUNICATION.

When Monitored and Set Condition:

P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY

When Monitored:

During cold start.

Set Condition:

Compares shut down time to coolant temperature.

POSSIBLE CAUSES

FUSED IGNITION SWITCH OUTPUT (OFF-RUN-START)

PCM INTERNAL FAULURE

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the PCM harness connector.
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.
Turn the ignition to run.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output (Off-Run-Start) cavity C1-12 circuit at the appropriate terminal of the special
tool #8815.
NOTE: If the test light illuminates, wiggle the wiring harness to ensure that
the problem is not an intermittent wiring problem.
Does the test light illuminate brightly?

All

Yes

→ Replace the Powertrain Control Module in accordance with the

Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Check all related fuses. Repair the Fused Ignition Switch Output

circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

452

DRIVEABILITY - NGC

Symptom:

P1681-NO FUEL LEVEL BUS MESSAGE

When Monitored and Set Condition:

P1681-NO FUEL LEVEL BUS MESSAGE

When Monitored:

Ignition on.

Set Condition:

No fuel level BUS messages received by the PCM for 20 seconds.

POSSIBLE CAUSES

DTC RESET

COMMUNICATE WITH BCM

FUEL LEVEL BUS MESSAGE

PCI BUS CIRCUIT OPEN FROM PCM TO BCM

BCM

TEST

ACTION

APPLICABILITY

1

NOTE: If a fuel level circuit or performance DTC is set along with P1681,
diagnose the circuit/performance DTC before continuing.
Turn the ignition on.
With the DRBIII

t, erase DTCs.

Start the engine on and off several times. Leave the engine running for at least 20
second each time.
With the DRBIII

t, read DTCs.

Does the DTC reset?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

2

Ignition on, engine not running.
With the DRBIII

t, attempt to communicate with the BCM.

Can communication be established with the BCM?

All

Yes

→ Go To 3

No

→ Refer to the Communication Category and perform the appropri-

ate symptom related to no communication with BCM.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

3

Turn the ignition on.
Using the DRBIII

t, read the Fuel Level parameter in the PCM.

Does the DRBIII

t display a fuel level value?

All

Yes

→ Replace and program the Powertrain Control Module in accor-

dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Go To 4

453

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the BCM harness connector.
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 PCI Bus circuit from the BCM harness connector to the
appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace BCM in accordance with the Service Information.

Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

No

→ Repair the PCI Bus circuit between the PCM and the BCM for an

open.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.

454

DRIVEABILITY - NGC

P1681-NO FUEL LEVEL BUS MESSAGE —

Continued