Posting just in case this might help someone else with a similar issue.
2009 Genesis 4.6 power steering intermittent then eventually nothing at all. I've seen quite a few complaints from others about no power steering.
The 80 AMP and 10 AMP EHPS fuses under the hood were good. Scan tool was unable to connect to the EHPS module.
There are 2 connectors for the pump. The 3 pin connector with smaller wires carries 12v for the EHPS moduler, CAN high, and CAN low. The EHPS module gets steering angle sensor and vehicle speed sensor data from the CAN bus through this connector. The larger 2 position connector caries high current (80 amps) 12v and ground to run the pump motor.
The terminals in the larger connector were making poor contact with the steering pump despite the connector being fully seated and showing no signs of corrosion or damage. Disconnected the power connector from the pump, used needle nose to squeeze the terminals on the wiring harness so they'd make better contact. Cleaned with contact cleaner for good measure. Reattached and that corrected the no power steering issue and EHPS module is now responding to scan tool.
Best way to deal with this is to remove the front bumper. That will give easy access to the pump and wiring harness under the passenger headlight. With the engine running, apply sideways pressure to the power connector while it's connected to the pump. If the pump runs intermittently as you push the connector around it's most likely loose terminals in the harness.
If you want to replace the connector it's a 2 position female AMP connector. Repair manual lists it as AMP_312WP_02F_B. I'll see if I can get AMP part numbers off it tomorrow. A bit of searching online turned up a vendor that sells a pigtail for around $75.00.
Just for good measure I also cleaned and lubed the ground wire on the ring terminal attached to the pump and the terminal on the frame. The frame grounds for this circuit are located on the passenger side frame rail next to the exhaust manifold above the alternator. If you remove the air cleaner you'll see two wires running over the edge of the frame rail. One of the wires will be a fairly large gauge. The are crimped together into a ring terminal and bolted to the frame rail.
2009 Genesis 4.6 power steering intermittent then eventually nothing at all. I've seen quite a few complaints from others about no power steering.
The 80 AMP and 10 AMP EHPS fuses under the hood were good. Scan tool was unable to connect to the EHPS module.
There are 2 connectors for the pump. The 3 pin connector with smaller wires carries 12v for the EHPS moduler, CAN high, and CAN low. The EHPS module gets steering angle sensor and vehicle speed sensor data from the CAN bus through this connector. The larger 2 position connector caries high current (80 amps) 12v and ground to run the pump motor.
The terminals in the larger connector were making poor contact with the steering pump despite the connector being fully seated and showing no signs of corrosion or damage. Disconnected the power connector from the pump, used needle nose to squeeze the terminals on the wiring harness so they'd make better contact. Cleaned with contact cleaner for good measure. Reattached and that corrected the no power steering issue and EHPS module is now responding to scan tool.
Best way to deal with this is to remove the front bumper. That will give easy access to the pump and wiring harness under the passenger headlight. With the engine running, apply sideways pressure to the power connector while it's connected to the pump. If the pump runs intermittently as you push the connector around it's most likely loose terminals in the harness.
If you want to replace the connector it's a 2 position female AMP connector. Repair manual lists it as AMP_312WP_02F_B. I'll see if I can get AMP part numbers off it tomorrow. A bit of searching online turned up a vendor that sells a pigtail for around $75.00.
Just for good measure I also cleaned and lubed the ground wire on the ring terminal attached to the pump and the terminal on the frame. The frame grounds for this circuit are located on the passenger side frame rail next to the exhaust manifold above the alternator. If you remove the air cleaner you'll see two wires running over the edge of the frame rail. One of the wires will be a fairly large gauge. The are crimped together into a ring terminal and bolted to the frame rail.
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