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Two separate troubles here, no corrallation in between the two. The Theft deterent may be cause by a faulty theft module not analysis the key. DTC P1626Circuit DescriptionThe body regulate module (BCM) produce the theft deterrent fuel enable signal once ignition is ON and the proper crucial resistor pellet is sensed. The powertrain regulate module (PCM) monitors the fuel permit signal during crank. If the appropriate signal is existing on the theft deterrent fuel permit circuit, the PCM allows fuel distribution to enable the engine come start. If the PCM detects the the fuel enable signal is not existing or incorrect while the engine is running, DTC P1626 will certainly be set. DTC P1626 can cause a no-start condition or common operation depending on when the loss of the fuel permit signal was detected. The engine will proceed to start and also run if the condition that collection DTC P1626 emerged after the BCM sensed the proper vital resistor pellet and also signaled the PCM to continue fuel delivery. The engine will certainly start and immediately stall if the condition that collection DTC P1626 arisen before the BCM sensed the proper an essential resistor pellet. V this condition present, the PCM will inhibit fuel delivery and the BCM will disable the starter.DTC P1629Circuit DescriptionThe body manage module (BCM) produce the theft deterrent fuel permit signal when ignition is ON and the proper vital resistor pellet is sensed. The powertrain control module (PCM) monitors the fuel allow signal during crank. If the ideal signal is existing on the theft deterrent fuel allow circuit, the PCM allows fuel delivery to enable the engine come start. If the PCM detects the the fuel allow signal is not current or incorrect during engine crank, DTC P1629 will be set. DTC P1629 can reason a no-start condition or regular operation depending on when the loss of the fuel allow signal was detected. The engine will proceed to start and run if the condition that collection DTC P1629 occurred after the BCM sensed the proper key resistor pellet and also signaled the PCM to proceed fuel delivery. The engine will certainly start and immediately stall if the problem that set DTC P1629 emerged before the BCM sensed the proper crucial resistor pellet. With this problem present, the PCM will certainly inhibit fuel delivery and also the BCM will disable the starter.Only difference in between these 2 codes space one sets throughout cranking and the other detects while running.I have bypassed many of these equipment by presenting the appropriate resistance right into the yellow cable going come theft module equal to crucial resistor. Yet these bypasses just works with tricks that had actually the resistor embeded in the vital and not the plastic component of an essential handle. Ohm the out in between the yellow cable cut and the black color wire (two middle wires on each side of the connectors. Insert resistance that ohmmeter check out with vital in lock cyl. If if won"t wok top top the first try girlfriend may have to shot a couple of resistors carefully resembling your ohm meter reading. Post ago if this works, If no there are various other ways.Here is another method I discovered on the net however my method is simpler, however if that doesn"t work you may shot this one.PASSLOCK i or II DISABLEMENTThe adhering to is a procedure to disable Passlock ns or II equipment for vehiclesin which far start/stop system installations are required. This procedureis required due to the fact that a remote start mechanism will not function with the currentTheft Deterrent device (Passlock) which is had on numerous 1996 and up GMvehicles.Please note that this change is intended to be offered only in conjunctionwith the surroundings of a far start/stop system and does not provide aprocedure to download a remote start/stop system.CAUSEIf an attempt is do to start a car by a way other 보다 a key rotationin the ignition switch, the Body control Module (BCM) will analyze thisstart together a car theft and also disable the fuel injectors.CORRECTIONA minor wiring modification may it is in made to permit the auto to it is in startedremotely. This modification includes including a switch to allow the client toselect ?ON? to enable remote starting or ?OFF? for regular Passlock operation.CAUTION: as soon as this change is performed and also the switch is set to the ONposition, the theft deterrent function will it is in disabled. As soon as the theftdeterrent is disabled the SECURITY/THEFT system telltale will certainly light upindicating that the theft deterrent device is not functioning.PASSLOCK MODIFICATIONRefer to proper GM service manuals and/or SVMQP electrical GuidelineManual because that instruction top top splicing and also electrical connections.1. Select a suitable on-off switch (see note below) which will be provided todisable/enable the Passlock System. Mountain the move in a ar such the it isaccessible to the driver and also will not interfere with normal auto operation.NOTE: This is an extremely low current circuit (approx. 7mA), it is thereforevery essential that a high quality, low energy, quick acting move beutilized for this application.2. Revolve the ignition switch to the turn off position.3. Situate the main Ignition switch Harness in the Column. GM"s PasslockSystem wires exit the Ignition move Tumbler together and then join with theMain Ignition switch Harness. (See http://www.bulldogsecurity.com/ orhttp://188.8.131.52/diagrams/diagrams.asp and select her Make, design andYear for wire colors and clues top top the quickest method to accessibility these wires.)4. Find the Yellow Passlock Data cable which is included in a bundle ofthree tiny (20 GA) wires sheathe in friction tape.Cut this wire and splice a 0.5mm2 (20 GA) yellow cable to each finish of the cutwire.Keep wire size to a minimum. Route change wires clean of relocating parts.Connect the yellow wires to the switch such that the contact are open up whenthe switch is in the ~ above position.5. Turn alteration switch to the off postion (contacts closed).6. Start vehicle to verify regular operation. If engine ?cranks however will notstart"recheck the switch position (contacts must be closed), cable connectors andmodification wiring.SWITCH OPERATIONTo enable remote start:Start the engine through the ignition crucial (modification switch need to be in theOFFposition). Turn alteration switch to the ON place (contacts open). TheSECURITY/THEFT system Telltale will certainly light up indicating the the PasslockSystem is inoperative.Once the SECURITY/THEFT mechanism telltale has actually been on because that at least 5 secondsthe auto can it is in turned off and then remotely started.To disable remote start:The Passlock System have the right to be reactivated by turning the modification switch OFF(contacts closed). Automobile can one of two people be to run or off when this is done.Please note that the VCM/PCM will document Diagnostic trouble Codes (DTCs)related to the security system when the modification switch is in the ONposition (circuit open). This is because of the way that the VCM/PCM interpretsthis condition.NOTICEAny condition which gets rid of battery power from the automobile ControlModule/Powertrain manage Module (VCM/PCM) (e.g. Dead battery, disconnectedharness connectors, etc.) will avoid the auto from being restarted.
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Ifthe engine exhibits a ?cranks however will not start? symptom, ar themodification move in the off (contacts closed) position. This willreactivate the Passlock mechanism and permit the automobile to be began with theignition key