SYSTEMS article. If symptom still exists, go to next step.
9. Replace instrument cluster. See appropriate ANALOG INSTRUMENT PANELS article. Retest
operation.
DTC 25/35: SECURITY INDICATOR LIGHT STATUS
Description
Body Control Module (BCM) provides a 12-volt output to illuminate SECURITY indicator light.
DTC 25/35 will set when BCM detects SECURITY indicator light circuit is either open or shorted to ground for
more than 50 milliseconds.
Diagnostic Aids
If only history DTC 35 is set, problem may be intermittent. Try to recreate fault by wiggling wiring and
connectors while performing test. Check for poor connections at all connectors that may be causing intermittent
condition. DTC 35 will clear when fault is corrected and memory is cleared.
Testing
1. Turn ignition switch to RUN position. If SECURITY indicator light illuminates, go to next step. If
SECURITY indicator light does not illuminate, go to step 3 .
2. Attempt to enter Body Control Module (BCM) diagnostic mode. If SECURITY indicator light flashes
DTCs, system is operating properly. Go to appropriate diagnostic procedure. See BCM DTC
DEFINITIONS table under SELF-DIAGNOSTIC SYSTEM. If SECURITY indicator light does not
flash DTCs, go to next step.
3. Ensure ignition switch is in RUN position. Disconnect Red 2-pin SECURITY indicator light connector.
Connect DVOM between ground and Red 2-
pin SECURITY indicator light connector terminal "B" (Dark
Green wire). If battery voltage exists, go to step 5 . If battery voltage does not exist, go to next step.
4. Turn ignition switch to OFF position. Check for open or poor connection in Dark Green wire between
Blue 32-pin BCM connector C1 terminal C16 and Red 2-pin SECURITY indicator light connector
terminal "B". See appropriate wiring diagram in appropriate ANTI-THEFT SYSTEMS article. See Fig.
2 . Repair as necessary and retest operation. If Dark Green wire is okay, go to step 8 .
5. Connect DVOM between ground and Red 2-pin SECURITY indicator light connector terminal
"A" (Black wire). If continuity exists, go to next step. If continuity does not exist, go to step 7 .
6. Check for poor connection or open in Black wire between Black 6-pin BCM connector C2 terminal "A"
and Black 56-pin in-line harness connector terminal G1. See WIRING DIAGRAMS . See Fig. 5
as necessary and retest operation. If Black wire checks okay, go to step 8 .
7. Check for open in Black wire between Red 2-pin SECURITY indicator light connector terminal "A" and
ground connection located under right side of instrument panel mounted to Heating Ventilation Air
Conditioning (HVAC) plenum bracket. See appropriate wiring diagram in appropriate ANTI-THEFT
SYSTEMS article. Repair as necessary and retest operation. If Black wire checks okay, go to next step.
8. Replace Body Control Module (BCM). See BODY CONTROL MODULE (BCM) under REMOVAL
& INSTALLATION. Reprogram RKE transmitter(s). Retest operation.
2000 Cadillac Escalade
2000 ACCESSORIES & EQUIPMENT' 'Body Control Modules - Escalade, Tahoe & Yukon Denali
Microsoft
October-22-10 7:55:08 PM Page 17 ©
2005 Mitchell Repair Information Company, LLC.
