Digital Radio Frequency (RF) message received from Remote Keyless Entry (RKE) system transmitter was
valid, and all security checks passed.
DTC 41 will set when RKE system transmitter has been in programming mode out of range of Body Control
Module (BCM), or when system transmitter is defective.
Diagnostic Aids
If RKE system transmitter digital RF message is sent and no DTC is set, transmitter may be defective. If RKE
system transmitter digital RF message is sent and DTC 41 is set, but corresponding function does not operate,
Body Control Module (BCM) or harness may be defective.
Testing
1. Reprogram Remote Keyless Entry (RKE) transmitter. See REMOTE KEYLESS ENTRY (RKE)
TRANSMITTER under PROGRAMMING. Attempt to perform all functions controlled by RKE
transmitter. If RKE transmitter controls all functions, repair is complete. If RKE transmitter does not
control all functions, go to next step.
2. Program a known-
good RKE transmitter. Attempt to perform all functions controlled by RKE transmitter.
If RKE transmitter controls all functions, repair is complete. If RKE transmitter does not control all
functions, go to next step.
3. Replace Body Control Module (BCM). See BODY CONTROL MODULE (BCM) under REMOVAL
& INSTALLATION. Reprogram RKE transmitter(s). Retest operation.
DTC 42: LAST TRANSMITTER MESSAGE RECEIVED HAD INVALID ID
Description
Digital Radio Frequency (RF) message received was from a Remote Keyless Entry (RKE) system transmitter
not programmed to Body Control Module (BCM). Remote function capabilities will not exist.
DTC 42 will set when RKE system transmitter was used without programming it to BCM. If transmitter was
already programmed, transmitter may be defective. DTC 42 will also set if another transmitter was operated in
the same area.
BCM should be placed in RKE system programming mode. Both transmitters must be programmed to BCM
simultaneously.
Diagnostic Aids
DTC 42 may set if one or more of the following occur during BCM diagnostic mode:
Transmitter is defective.
Transmitter not programmed to BCM was used.
2000 Cadillac Escalade
2000 ACCESSORIES & EQUIPMENT' 'Body Control Modules - Escalade, Tahoe & Yukon Denali
Microsoft
October-22-10 7:55:08 PM Page 19 ©
2005 Mitchell Repair Information Company, LLC.
