Security Light on Intermittently / No Crank/No Start or Start Stall / Keyless Access Vehicles May Display No Remote/Fob Detected / Poor or No RKE Range / Service TPM – GM

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Bulletin No.: PIC5650J
Published date: 07/21/2021
Preliminary Information
PIC5650J Diagnostic Tip – Security Light on Intermittently / No Crank/No Start or Start Stall /
Keyless Access Vehicles May Display No Remote/Fob Detected / Poor or No RKE Range / Service TPM
Models

All

Brand:

All

Model:

Model Years: 2007 – 2022

VIN:
from to All All

All

Engine:

All

Transmissions:

Supersession Statement
This PI was superseded to update the Models and Recommendations / Instructions section . Please
discard PIC5650H.
Condition / Concern
A customer may comment on any of the following complaints:
– Intermittent no crank
– Intermittent no start, or start and stall
– Security / Theft light / Message
– Poor or no RKE range
– Keyless or passive entry/start inoperative
– No Fob Detected message
– Service Tire Pressure Monitor message
– Any of the following DTC’s: B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.

Note: On vehicles equipped with keyless/passive start, the vehicle will start if the fob is placed
in the fob pocket. In most cases, these concerns cannot be duplicated.
The above systems use Radio Frequency (RF) to transmit information. Some aftermarket devices cause
Radio Frequency Interference (RFI), which can “jam” the radio frequency being transmitted.

Listed below are a number of aftermarket devices that can cause RFI. In many cases, these types of
devices will be attached to the customer’s key ring and could be removed from the key ring or from
inside the vehicle when the customer drops the vehicle off for service.
– Vehicle immobilizer keys from other vehicles
– Keyless access transmitters from other vehicles
– Interstate/bridge toll passes
– Gate/door passes to allow access to pools, driveways, entry doors, etc.
– Community/parking access cards
– Fuel station speed passes
– Building access swipe cards/ transponder devices

Additional items to be aware of:

– Aftermarket LED dome, tail, turn, stop, strip, floor, door, Logo, head lights
In many cases, when the LED lighting is turned on it can interfere with a RF signal. Example, RKE
inoperative after the fi fob button press. When the RKE fob button is pressed the dome lights may
turn on, which if equipped with an aftermar LED dome light, it can interfere with any additional
fob button presses.
– Certain cell phone chargers
– USB power banks
– USB flash lights
– Fans (12 volt or 110 volt)
– Any type of USB, 12 volt or 110 volt chargers
– “Bedazzle Trim Ring” surrounding ignition lock cylinder, shown below (1)

Recommendations / Instructions
Important: Do not replace any parts for this concern prior to duplicating the concern and reviewing
the following information:

Before any in depth diagnosis is performed, question the customer or inspect the vehicle for any
types of aftermarket equipment, like shown above, which could cause RFI. These items need to
removed and/or disconnected from the vehicle.

It is possible to get RFI from transponders or other frequency emitting devices in the area.
Aftermarket RFI meters/sniffers are available that can be utilized as an aid to locate stray RFI
signals. It is important to know what the complaint is and what frequency you are checking. When
testing a vehicle for stray RFI signals there are three common frequencies that are used; 315 MHZ,
433 MHz, and 125 kHz. Make sure the meter you use checks for frequencies at and around these 3
commonly used frequencies.

315 MHz (RKE and TPM frequency) 433 MHz (RKE and TPM frequency)
125 kHz (Passive entry antennas used on vehicles with passive start/entry)
In some cases, the use of the J 43241 Keyless Entry Tester or EL-52545 Tire Pressure Monitor Sensor
and RF Diagnostic Tools to scan the vehicle for stray RFI signals have been useful. Remember while
scanning the vehicle you may need to turn on and off electrical devices to see if they are causing
the RF interference. An example of this is if a vehicle is equipped with aftermarket LED dome
lights. If the dome lights are not on when you scan the vehicle, no interference will be found.

Important: Dealer should also direct their customers to the appropriate section in the Owner
manuals that references that the device complies with Part 15 of the FCC Rules. Examples, of where
this info may be found depend on the model and/or year. This may be found under Immobilizer
Operation, Keyless Entry, Keyless Access, or Radio Frequency Statement sections.

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NHTSA ID Number: 10123252

Manufacturer Communication Number: PIC5650C

Summary

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

1 Associated Document

Manufacturer Communications

Bulletin No.: PIC5650C
Published date: 10/13/2017

https://www.nhtsa.gov/recalls?nhtsaId=10123252

MC-10123252-9999.pdf 814.917KB

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NHTSA ID Number: 10115076

Manufacturer Communication Number: PIC5650B

Summary

This Preliminary Information communication provides information to the technician about vehicles that have an intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, and/or B3935. Technician should not replace any parts for this concern. If unable to duplicate the concern ask if the customer uses any Radio Frequency Identification Devices when the concern is present. Dealer should also direct their customers to the appropriate section in the Owner manuals that references that the device complies.

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1 Associated Document

Manufacturer Communications

Bulletin No.: PIC5650B
Date: Jun-2015

https://www.nhtsa.gov/recalls?nhtsaId=10115076

MC-10115076-9999.pdf 210.965KB

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