Chrysler Voyager. Manual — part 8
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the DRB from the DLC.
Disconnect the PCM harness connectors.
Disconnect the TCM harness connector (if equipped).
Turn the ignition on.
Measure the voltage of the SCI Transmit (PCM) circuit at the DLC connector.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the SCI Transmit (PCM) circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the DRB from the DLC.
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the SCI Receive (PCM) circuit at the DLC connector.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the SCI Receive (PCM) circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the DRB from the DLC.
Disconnect the PCM harness connectors.
Measure the resistance between the SCI Transmit (PCM) circuit and the SCI Receive
(PCM) circuit at the PCM connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the short between the SCI Transmit (PCM) and the SCI
Receive (PCM) circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→ Go To 7
7
Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance between ground and the SCI Receive (PCM) circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the SCI Receive (PCM) circuit for a short to ground.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance of the SCI Receive (PCM) circuit between the PCM C2
connector and the DLC.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the SCI Receive (PCM) circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
31
COMMUNICATION
*NO RESPONSE FROM PCM (SCI ONLY) - SBEC —
Continued
TEST
ACTION
APPLICABILITY
9
Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance of the SCI Transmit (PCM) circuit between the PCM C2
connector and the DLC.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 10
No
→ Repair the SCI Transmit (PCM) circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
10
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.
32
COMMUNICATION
*NO RESPONSE FROM PCM (SCI ONLY) - SBEC —
Continued
Symptom:
*PCI BUS COMMUNICATION FAILURE
POSSIBLE CAUSES
WIRING HARNESS INTERMITTENT
OPEN PCI BUS CIRCUIT AT THE DATA LINK CONNECTOR (DLC)
PCI BUS CIRCUIT SHORTED TO VOLTAGE
MODULE SHORT TO VOLTAGE
PCI BUS CIRCUIT SHORTED TO GROUND
MODULE SHORT TO GROUND
TEST
ACTION
APPLICABILITY
1
Note: Determine which modules this vehicle is equipped with before begin-
ning.
Note: When attempting to communicate with any of the modules on this
vehicle, the DRB will display 1 of 2 different communication errors: a NO
RESPONSE message or a BUS +/- SIGNALS OPEN message.
Turn the ignition on.
Using the DRB, attempt to communicate with the following control modules:
Airbag Control Module
Body Control Module
MIC (INSTRUMENT CLUSTER)
Was the DRBIII
t able to communicate with one or more Module(s)?
All
Yes
→ Go To 2
No
→ Go To 3
2
Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: If the DRB can not communicate with a single module, refer to the
category list for the related symptom.
Were any problems found?
All
Yes
→ Repair wiring harness/connectors as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
33
COMMUNICATION
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the PCM/ECM harness connector. Note: If equipped with NGC follow the
caution below.
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.
Disconnect the DRB from the Data Link Connector (DLC).
Disconnect the negative battery cable.
Measure the resistance of the PCI Bus circuit between the Data Link Connector
(DLC) and the PCM/ECM harness connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
NOTE: Reconnect the PCM/ECM harness connector and the negative bat-
tery cable.
Turn the ignition on.
Measure the voltage of the PCI Bus circuit at the Data Link Connector (DLC).
Is the voltage above 7.0 volts?
All
Yes
→ Go To 5
No
→ Go To 6
5
Turn the ignition off.
Using a voltmeter, connect one end to the PCI Bus circuit at the DLC, and the other
end to ground.
Note: When performing the next step turn the ignition off (wait one minute)
before disconnecting any module. When the module is disconnected turn
the ignition on to check for a short to voltage.
Turn the ignition on.
While monitoring the voltmeter, disconnect each module the vehicle is equipped with
one at a time.
Is the voltage steadily above 7.0 volts with all the modules disconnected?
All
Yes
→ Repair the PCI Bus circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the module that when disconnected the short to voltage
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
34
COMMUNICATION
*PCI BUS COMMUNICATION FAILURE —
Continued
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