B1A72

B1A72-01-PASSIVE ENTRY ANTENNA 2 - GENERAL ELECTRICAL FAILURE





For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

- When Monitored:
During a Keyless Go event.

- Set Condition:
When the driver starts the vehicle, using the Push Button, the Passive Entry Module looks at the antennas and verifies that they are operational. This Diagnostic Trouble Code (DTC) sets if it finds that the signal or return circuit of antenna 2 is open or short to ground.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Before proceeding, check for any Technical Service Bulletins that relate to the WIN or the PEM modules.

NOTE: If there is an antenna problem, the Keyless Go feature will not operate.

1. Using the FOBIK, turn the ignition on.
2. Using the scan tool, record and erase the DTCs.
3. With the scan tool, select: PEM, More Options and System Tests.
4. Perform the PEM LF Antenna Verification Tests.
5. With the scan tool, read the DTCs.

Does the scan tool display: B1A72-01-PASSIVE ENTRY ANTENNA 2 - GENERAL ELECTRICAL FAILURE as active?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (D922) PASSIVE ENTRY ANTENNA 2 SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the Passive Entry Module C2 connector.
3. Measure the resistance between ground and the (D922) Passive Entry Antenna 2 Signal circuit.

Is the resistance below 20,000 Ohms?

Yes

- Repair the (D922) Passive Entry Antenna 2 Signal circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (D922) PASSIVE ENTRY ANTENNA 2 SIGNAL CIRCUIT OPEN




1. Disconnect the Passive Entry Antenna 2 connector.

NOTE: See service information for the location of Antenna 2.

2. Measure the resistance of the (D922) Passive Entry Antenna 2 Signal circuit between the PEM C2 connector and the Antenna 2 connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (D922) Passive Entry Antenna 2 Signal circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. (D923) PASSIVE ENTRY ANTENNA 2 RETURN CIRCUIT OPEN




1. Measure the resistance of the (D923) Passive Entry Antenna 2 Return circuit between the PEM C2 connector and the Antenna 2 connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Antenna 2 and repeat the PEM LF Antenna Verification Tests. If this DTC is still active and there are no other DTCs present, replace the Passive Entry Module.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (D923) Passive Entry Antenna 2 Return circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.