PRE-RELEASE
No Remote Detected
| No Remote Detected |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Keyless Entry Antenna Signal - Center Console Front | B3122 02 | B3122 05 | B3122 05 | - |
| Keyless Entry Antenna Low Reference - Center Console Front | - | B3122 05 | - | - |
| Keyless Entry Antenna Signal - Center Console Rear | B3123 02 | B3123 05 | B3123 05 | - |
| Keyless Entry Antenna Low Reference - Center Console Rear | - | B3123 05 | B3123 05 | - |
| Keyless Entry Antenna Signal - Rear Compartment | B3124 02 | B3124 05 | B3124 05 | - |
| Keyless Entry Antenna Low Reference - Rear Compartment | - | B3124 05 | - | - |
| Circuit/System Description |
When a transmitter authentication is requested, the front console, rear console, and rear compartment antennas simultaneously broadcast a challenge within the passenger compartment to the transmitter. If the response from the transmitter via radio frequency (RF) is a valid response, the body control module (BCM) determines there is a transmitter within the vehicle. If no response is received, the BCM determines that no transmitter is in the vehicle, and NO REMOTE DETECTED will be displayed on the DIC.
| Diagnostic Aids |
A low transmitter battery or radio frequency (RF) interference from aftermarket devices such as 2-way radios, power inverters, cellular phone chargers, computers, etc. may cause a system malfunction. High RF traffic areas, such as gas stations which use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction.
Conditions caused by external influences such are these are considered to be normal. Following this diagnostic will not diagnose an RF interference condition. If RF interference is suspected, question the customer about the conditions or location where the NO REMOTE DETECTED condition occurs.
| Reference Information |
Schematic Reference
Remote Function Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Keyless Entry System Description and Operation (without ATH) Keyless Entry System Description and Operation (with ATH)
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
Special Tools
J 43241 Keyless Enter Tester
| Circuit/System Verification |
| Note | ||
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This condition may be caused by low vehicle battery voltage. If the battery is not sufficiently charged (above 10 volts), the system will have difficulties detecting the fob and the NO REMOTE DETECTED message will be displayed. Correct the low battery voltage condition to eliminate this condition. |
| 1. |
Verify that DTC B3119, B3120, B3121, B3122, B3123, or B3124 is not set.
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| 2. |
If any of the DTCs are set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle
.
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| 3. |
Place the transmitter on the test pad of the J 43241 and press each transmitter button one at a time, holding each button for three seconds. The tester should sound a tone and illuminate a green light for the entire three second button press.
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| 4. |
If one or more buttons does not sound the tone and illuminate the green light for the entire three seconds, replace the transmitter battery and retest with the J 43241 . If the condition continues after battery replacement, replace the transmitter. |
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Verify the vehicle starts with the transmitter located in the transmitter pocket.
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| 6. |
Verify the NO REMOTE DETECTED message is not displayed on the DIC while attempting to start the vehicle, placing the keyless entry transmitter in various locations within the vehicle interior at each start attempt. The vehicle should start.
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| 7. |
If the NO REMOTE DETECTED message is displayed at any time, refer to Circuit/System Testing.
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| 8. |
Inspect for any sources of RF interference such as cell phone chargers, power supplies, etc. that would interrupt transmitter and antenna communication. If inspection does not reveal any items causing RF interference, discuss with the customer the conditions or location where the NO REMOTE DETECTED condition occurs. Discuss any devices that are normally kept in the vehicle, such as a laptop or cell phone charger, which may have been removed when the vehicle was brought in for service. It may be necessary to explain to the customer how RF interference degrades the performance of the system.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the appropriate T10 keyless entry antenna. |
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| 2. |
Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground.
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If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry control module.
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Ignition OFF, install a DMM between the signal circuit terminal 1 and ground. Set the DMM to capture DC voltage using the MIN MAX function. |
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Activate the antenna by pressing the ignition mode switch. Verify the MAX voltage captured by the DMM is greater than 1.0 V.
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If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
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Test for less than 1 V between the low reference circuit terminal 2 and ground.
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| 8. |
If greater than the specified range, test the low reference circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry control module.
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| 9. |
Install a DMM between the signal circuit terminal 1 and the low reference circuit terminal 2. Set the DMM to capture DC voltage using the MIN MAX function. |
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| 10. |
Activate the antenna by pressing the ignition mode switch. Verify the MAX voltage captured by the DMM is greater than 1.0 V.
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| 11. |
If less than the specified range, test the low reference circuit for an open circuit/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
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| 12. |
If all circuits test normal, replace the appropriate T10 keyless entry antenna.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Ignition Lock Key Transmitter Antenna Replacement - Instrument Panel
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Ignition Lock Key Transmitter Antenna Replacement - Floor Console
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Ignition Lock Key Transmitter Antenna Replacement - Rear Compartment
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Control Module References
for keyless entry control module replacement, setup, and programming
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