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Chrysler RG Voyager. Manual - part 192

Symptom:

IGN. UNLOCK R-S OUTPUT OPEN

When Monitored and Set Condition:

IGN. UNLOCK R-S OUTPUT OPEN

When Monitored:

Ignition on.

Set Condition:

When the output off, there is an open condition detected for more than 10

seconds.

POSSIBLE CAUSES

TEST FOR CURRENT DTC’S

IPM INTERNALLY OPEN

(F2) FCM OUTPUT (UNLOCK-RUN-START) CIRCUIT OPEN

(F1) FCM OUTPUT (UNLOCK-RUN-START) CIRCUIT OPEN

FCM

TEST

ACTION

APPLICABILITY

With the DRBIII

t, record and erase the current Front Control Module DTC’s.

Cycle the ignition from ON to OFF.
Start the vehicle and observe the DRBIII

With the DRBIII

t, read DTC’s.

Does the DRBIII

t display: Ign. UNLOCK RUN-START Output Open?

All

Yes

→ Go To 2

→ The condition that caused this DTC is currently not present. Use

the wiring diagram/schematic as a guide, and inspect the related
wiring harness for a possible intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the FCM from the IPM.
Disconnect the C3 and C7 IPM harness connectors.
Measure the resistance of the (F1, F2) FCM Output (UNLOCK-RUN-START) circuit,
through the IPM, between the FCM/IPM harness connector and the IPM C3 and C7
harness connections.
Is the resistance below 5.0 ohms for each measurement?

All

Yes

→ Go To 3

→ Replace the IPM per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

737

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

NOTE: If this vehicle is equipped with a Manual Transaxle answer YES to
the test and continue.
Disconnect the Brake Trans Shift Interlock harness connector.
Measure the resistance of the (F2) FCM Output (Unlock-Run-Start) circuit from the
IPM C7 harness connector the Brake Trans Shift Interlock harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 4

→ Repair the open in the (F2) FCM Output (Unlock-Run-Start)

circuit.
Perform BODY VERIFICATION TEST - VER 1.

Disconnect the PCM C1 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 (F1) FCM Output (Unlock-Run-Start) circuit from the
IPM C3 harness connector the appropriate terminal of special tool #8815 in place of
the PCM C1 harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the FCM per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

→ Repair the open in the (F1) FCM Output (Unlock-Run-Start)

circuit.
Perform BODY VERIFICATION TEST - VER 1.

738

IGNITION, POWER, ACCESSORY

IGN. UNLOCK R-S OUTPUT OPEN —

Continued

Symptom:

IGN. UNLOCK R-S OUTPUT OVER CURRENT

When Monitored and Set Condition:

IGN. UNLOCK R-S OUTPUT OVER CURRENT

When Monitored:

Ignition on.

Set Condition:

When the output is active and there is a over current fault conditon

present for more than 1 second.

POSSIBLE CAUSES

TEST FOR CURRENT DTC’S

EXCESSIVE RESISTANCE IN THE IPM

(F2) FCM OUTPUT (UNLOCK-RUN-START) CIRCUIT EXCESSIVE RESISTANCE

(F1) FCM OUTPUT (UNLOCK-RUN-START) CIRCUIT EXCESSIVE RESISTANCE

BRAKE TRANS SHIFT INTERLOCK

FCM

TEST

ACTION

APPLICABILITY

With the DRBIII

t, record and erase the current Front Control Module DTC’s.

Cycle the ignition from ON to OFF.
Start the vehicle and observe the DRBIII

With the DRBIII

t, read DTC’s.

Does the DRBIII

t display: Ign. UNLOCK RUN-START Output Over Current?

All

Yes

→ Go To 2

→ The condition that caused this DTC is currently not present. Use

the wiring diagram/schematic as a guide, and inspect the related
wiring harness for a possible intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the FCM from the IPM.
Disconnect the C3 and C7 IPM harness connectors.
Check connectors - Clean/repair as necessary.
Measure the resistance of the (F1, F2) FCM Output (UNLOCK-RUN-START) circuit,
through the IPM, between the FCM/IPM harness connector and the IPM C3 and C7
harness connections.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

→ Replace the IPM per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

739

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

All

Yes

→ Go To 4

→ Repair the excessive resistance in the (F2) FCM Output (Unlock-

Run-Start) circuit.
Perform BODY VERIFICATION TEST - VER 1.

Disconnect the PCM C1 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 (F1) FCM Output (Unlock-Run-Start) circuit from the
IPM C3 harness connector to the appropriate terminal of special tool #8815 in place
of the PCM C1 harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 5

→ Repair the excessive resistance in the (F1) FCM Output (Unlock-

Run-Start) circuit.
Perform BODY VERIFICATION TEST - VER 1.

NOTE: If the vehicle is equipped with a Manual Transaxle answer NO to this
test and continue.
Connect all the previously disconnected harness connectors and install the FCM.
Turn the ignition on.
Using a voltmeter, perform a voltage drop test across the Brake Trans Shift Interlock
between terminals 1 and 2 while pressing the Brake Pedal.
Is the voltage reading greater the 0.2 of a volt?

All

Yes

→ Replace the Brake Trans Shift Interlock Solenoid per Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

→ Replace the FCM per Service Information.

Perform BODY VERIFICATION TEST - VER 1.

740

IGNITION, POWER, ACCESSORY

IGN. UNLOCK R-S OUTPUT OVER CURRENT —

Continued

Content .. 190 191 192 193 ..