Jeep 1997 Grand Cherokee Service Manual page 385

T/C POSITION 231 TRANSFER CASE (COM- MAND-TRAC) SWITCH
242 TRANSFER CASE
(SELEC-TRAC)
ZG
DIAGNOSIS AND TESTING (Continued)
cases, only one pair of wire harness connectors
should be joined. If OK, go to Step 5. If not OK, cor-
rect the wire harness connections as required.
(5) Refer to the VIC 4WD Display Characteristics
chart (Fig. 3). Check the continuity of the circuit for
the indicator lamp or wheel lamp that is not func-
tioning between the VIC module wire harness con-
nector and the transfer case switch wire harness
connector. There should be continuity. If OK, replace
the faulty VIC module. If not OK, repair the open cir-
cuit as required.
REAR LAMP FAILURE
Refer to the diagnosis for the lamp outage module
in Group 8L - Lamps to diagnose this feature of the
VIC module. Refer to 8W-46 - Message Center in
Group 8W - Wiring Diagrams for complete circuit
descriptions and diagrams.
TURN SIGNAL ON
Refer to Group 8J - Turn Signal and Hazard Warn-
ing Systems for more information on this feature of
the VIC module. The VIC module uses its internal
programming, and inputs from the combination
flasher on the fused ignition switch output (L5) cir-
cuit, and a vehicle speed sensor (distance) message
POSI- TION SWITCH 100 WAY T/C POSITION POSI- TION
Fig. 2 Transfer Case Switch
T/C POSITION GROUND #1 249 TRANSFER CASE (QUADRA-TRAC)
INSTRUMENT PANEL SYSTEMS
received on the CCD data bus from the Powertrain
Control Module to control this message.
If testing of the L5 circuit between the VIC module
wire harness connector and the combination flasher
cavity in the junction block reveals no problem, use a
DRB scan tool and the proper Body Diagnostic Pro-
cedures manual to diagnose the VIC module and the
CCD data bus. Refer to 8W-46 - Message Center in
Group 8W - Wiring Diagrams for complete circuit
descriptions and diagrams.
WASHER LEVEL LOW/WASHER SENSOR BAD
If the problem being diagnosed is related to lamp
accuracy, be certain to confirm that the problem is
with the lamp and sensor and not with the washer
fluid level. The actual fluid level should be checked
before you proceed with lamp and sensor diagnosis.
Refer to 8W-46 - Message Center in Group 8W - Wir-
ing Diagrams for complete circuit descriptions and
diagrams.
SWITCH POSITION
2 WD 4 ALL TIME
4 PART TIME N 4 PART TIME
4 LO
N 4 FULL TIME
4 LO
8E - 19
2WD
N
4 LO