Test 5A: Speed Proportional Steering System Functional Test
NOTE:
After each repair is complete, verify problem has been repaired by performing SPEED PROPORTIONAL STEERING SYSTEM VERIFICATION TEST
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- Connect scan tool to data link connector. Start engine. Turn steering wheel and observe amount of assist. Using scan tool, turn speed proportional steering solenoid off for 15 seconds. Turn steering wheel and observe amount of assist. If steering wheel was harder to turn while solenoid was off, go to next step. If steering wheel was not harder to turn while solenoid was off, check power steering pump operation (pressure). See SPEED PROPORTIONAL STEERING SYSTEM VERIFICATION TEST . If power steering pump pressure is okay, replace BCM.
- Speed proportional steering system is operating properly at this time. Check connectors at BCM and speed proportional steering solenoid for corrosion and loose terminals. If connectors are okay, check for short or open in Light Green/Pink and Violet/Orange wires between speed proportional steering solenoid and BCM. See WIRING DIAGRAMS . Repair as necessary.