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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.
420
COMMUNICATION
*PCI BUS COMMUNICATION FAILURE —
Continued
Summary of Contents for Caravan 2003
Page 24: ...NOTES xxiv ...
Page 64: ...NOTES 40 ...
Page 65: ...7 0 DIAGNOSTIC INFORMATION AND PROCEDURES 41 ...
Page 1080: ...C O N N E C T O R P I N O U T S 1056 CONNECTOR PINOUTS ...
Page 1119: ...10 2 2 BASE AUDIO SYSTEM S C H E M A T I C D I A G R A M S 1095 SCHEMATIC DIAGRAMS ...
Page 1123: ...10 3 3 FRONT ATC RHD S C H E M A T I C D I A G R A M S 1099 SCHEMATIC DIAGRAMS ...
Page 1125: ...10 4 COMMUNICATION S C H E M A T I C D I A G R A M S 1101 SCHEMATIC DIAGRAMS ...
Page 1130: ...10 6 EXTERIOR LIGHTING S C H E M A T I C D I A G R A M S 1106 SCHEMATIC DIAGRAMS ...
Page 1136: ...10 9 INTERIOR LIGHTING S C H E M A T I C D I A G R A M S 1112 SCHEMATIC DIAGRAMS ...
Page 1143: ...10 10 7 REAR BLOWER MOTOR S C H E M A T I C D I A G R A M S 1119 SCHEMATIC DIAGRAMS ...
Page 1145: ...10 11 MEMORY SYSTEM S C H E M A T I C D I A G R A M S 1121 SCHEMATIC DIAGRAMS ...
Page 1146: ...10 12 OVERHEAD CONSOLE S C H E M A T I C D I A G R A M S 1122 SCHEMATIC DIAGRAMS ...
Page 1147: ...10 13 POWER DOOR LOCKS RKE S C H E M A T I C D I A G R A M S 1123 SCHEMATIC DIAGRAMS ...
Page 1150: ...10 16 POWER LIFTGATE SYSTEM S C H E M A T I C D I A G R A M S 1126 SCHEMATIC DIAGRAMS ...
Page 1155: ...10 20 VEHICLE THEFT SECURITY SYSTEM S C H E M A T I C D I A G R A M S 1131 SCHEMATIC DIAGRAMS ...
Page 1157: ...10 21 WIPERS FRONT AND REAR S C H E M A T I C D I A G R A M S 1133 SCHEMATIC DIAGRAMS ...
Page 1158: ...NOTES 1134 ...
Page 1160: ...11 2 PCI BUS LAB SCOPE PATTERN C H A R T S A N D G R A P H S 1136 CHARTS AND GRAPHS ...