Circuit/System Testing

WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.

Ignition OFF, disconnect the harness connector at the T10E rear compartment keyless entry antenna.
Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground.
- 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.
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.
Activate the antenna by pressing the ignition mode switch. Verify the MAX voltage captured by the DMM is OL or is greater than .5 V.
- 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.
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.
Activate the antenna by pressing the rear closure touch pad. Verify the MAX voltage captured by the DMM is greater than .5 V.
- If less than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
If all circuits test normal, replace the T10E rear compartment keyless entry antenna. Verify DTC B3124 is not set.
- If the DTC is set, replace the K84 keyless entry control module.