1. Disconnect scan tool from Data Link Connector (DLC). Turn ignition switch to RUN position. Connect
DVOM between DLC connector terminals No. 2 (Purple wire) and 4 (Black wire). See Fig. 1 . If 7 volts
or more exists, go to next step. If less than 7 volts exists, go to step 9 .
2. Turn ignition switch to OFF position. Disconnect Light Gray 36-pin engine-to-instrument panel harness
connector, located in left rear corner of engine compartment. Turn ignition switch to RUN position.
Observe voltage reading with DVOM still connected between DLC connector terminals No. 2 (Purple
wire) and 4 (Black wire). If 7 volts or more exists, go to step 5 . If less than 7 volts exists, go to next step.
3. Turn ignition switch to OFF position. Reconnect Light Gray 36-pin engine-to-instrument panel harness
connector. Disconnect Black 10-pin Electronic Brake Control Module (EBCM) connector, located in left
rear corner of engine compartment near master cylinder. Turn ignition switch to RUN position. Observe
voltage reading with DVOM still connected between DLC connector terminals No. 2 (Purple wire) and 4
(Black wire). If 7 volts or more exists, go to next step. If less than 7 volts exists, go to step 17 .
4. Turn ignition switch to OFF position. On models equipped with diesel engine, disconnect Powertrain
Control Module (PCM) connectors located under right side of instrument panel behind glove box. On
models equipped with gasoline engine, disconnect Vehicle Control Module (VCM) connectors located
underhood on left inner fenderwell. On all models, turn ignition switch to RUN position. Observe voltage
reading with DVOM still connected between DLC connector terminals No. 2 (Purple wire) and 4 (Black
wire). If 7 volts or more exists, go to step 7 . If less than 7 volts exists, go to step 17 .
5. Turn ignition switch to OFF position. Disconnect Green 16-pin Electronic Variable Orifice/Passlock
(EVO/Passlock) module connector, located under center of instrument panel. Turn ignition switch to
RUN position. Observe voltage reading with DVOM still connected between DLC connector terminals
No. 2 (Purple wire) and 4 (Black wire). If 7 volts or more exists, go to next step. If less than 7 volts exists,
go to step 17 .
6. Turn ignition switch to OFF position. Disconnect Natural 32-pin Transfer Case Control Module (TCCM)
connector, located behind left side of instrument panel on steering column support bracket. Turn ignition
switch to RUN position. Observe voltage reading with DVOM still connected between DLC connector
terminals No. 2 (Purple wire) and 4 (Black wire). If 7 volts or more exists, go to step 8 . If less than 7
volts exists, go to step 17 .
7. Repair short to voltage in Purple wire between PCM (diesel) or VCM (gasoline), EBCM and Light Gray
36-pin engine-to-instrument panel harness connector. See appropriate wiring diagram in DATA LINK
CONNECTORS article in WIRING DIAGRAMS. After repairs, go to step 18 .
8. Repair short to voltage in Purple wire between DLC, EVO/Passlock module, TCCM and Light Gray 36-
pin engine-to-instrument panel harness connector. See appropriate wiring diagram in DATA LINK
CONNECTORS article in WIRING DIAGRAMS. After repairs, go to step 18 .
9. Turn ignition switch to OFF position. Connect DVOM between ground and DLC connector terminal No.
2 (Purple wire). If continuity exists, go to next step. If continuity does not exist, go to step 18 .
10. Disconnect Light Gray 36-pin engine-to-instrument panel harness connector, located in left rear corner of
engine compartment. Observe reading with DVOM still connected between ground and DLC connector
terminal No. 2 (Purple wire). If continuity exists, go to step 13 . If continuity does not exist, go to next
step.
11. Reconnect Light Gray 36-pin engine-to-instrument panel harness connector. Disconnect Black 10-pin
Electronic Brake Control Module (EBCM) connector, located in left rear corner of engine compartment
near master cylinder. Observe reading with DVOM still connected between ground and DLC connector
2000 Cadillac Escalade
2000 ACCESSORIES & EQUIPMENT' 'Body Control Modules - Escalade, Tahoe & Yukon Denali
Microsoft
October-22-10 7:55:08 PM Page 7 ©
2005 Mitchell Repair Information Company, LLC.
