Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Both Cooling Fans Always ON

Ignition OFF, disconnect KR20J Cooling Fan Low Speed Relay, ignition ON.
Verify that both cooling fans are OFF.
- If the cooling fans are ON
1. Ignition OFF, disconnect the harness connector at the G10R Cooling Fan Motor-Right, ignition ON.
2. Test for less than 1 V between KR20J Cooling Fan Low Speed Relay terminal 87/5 and ground.
  - If 1 V or greater, repair the short to voltage in the relay controlled output circuit.
- If the cooling fans are OFF
Test or replace the KR20J Cooling Fan Low Speed Relay.

One Cooling Fan Always ON

Ignition OFF, disconnect the KR20K Cooling Fan High Speed Relay, ignition ON.
Verify the cooling fan is OFF.
- If the cooling fan is ON
1. Ignition OFF, disconnect the harness connector at the G10L Cooling Fan Motor-Left, ignition ON.
2. Test for less than 1 V between KR20K Cooling Fan High Speed Relay terminal 87/5and ground.
  - If 1 V or greater, repair the short to voltage in the relay controlled output circuit.
- If the cooling fan is OFF
Test or replace the KR20K Cooling Fan High Speed Relay.