Power Steering Pump/Module Electrical
Contents
1. by Mercury Marine and may not be distributed or copied digitally or otherwise without the prior written consent of Mercury Marine Page 2 5 2009 Mercury Marine MARCH 2009 2009 03 Power Steering Pump Module Electrical Troubleshooting Outboard Boat Mounted Pum Ifthe voltages are correct across the driver module the power steering pump may be the problem Use the Power Steering Module Primer Kit to confirm a power steering pump failure 4 Check for proper voltage across the power steering signal harness To test break the connection point between the signal harness and the driver module a Power steering driver module b Power steering signal harness to engine c Pin A black d Pin B purple white e Pin C white blue NOTE These procedures cover a single engine application A multi engine signal harness adapter will be installed on boats powered by multiple outboards Be sure to check for voltages listed before and after the multi engine adapter harness a With the key in the off position no voltage should be present across any wire pair of the three signal harness wires or across any of these wires to ground b With the key on and the engine off battery voltage should be present across the purple white and black wires e There should be less than 1 volt lt 1 volt between the purple white and white blue wires DMT Meter Leads pet o lack Circuit voltage Power steering signal harness Purp2. MERCURY amarr ervice Bulletin Bulletin No 2009 03 OEM No 2009 03 Circulate to O Sales Manager O Accounting IM service Manager f Technician Parts Manager Power Steering Pump Module Electrical Troubleshooting Outboard Boat Mounted Pump Troubleshooting an Inoperable Power Steering Pump 1 Verify that battery cables power steering pump signal harnessing and driver module are installed according to the engine s installation service manual architecture 2 Verify that battery voltage is present on the battery cables leading to the power steering pump be sure to check the voltage on the power steering pump side of the fuse located on the positive cable a When battery voltage is present on these leads indicating a good fuse the power steering pump will actuate when the expected voltage is completed from the power steering signal harness driver module This voltage is sent in a two step process Step 1 key on then Step 2 engine starts and runs e The power steering pump may ramp up slowly if this two step process is not performed as instructed e The power steering pump will not actuate unless the engine is running THE INFORMATION IN THIS DOCUMENT IS CONFIDENTIAL AND PROTECTED BY COPYRIGHT AND IS THE PROPERTY OF MERCURY MARINE This document is provided for the sole and exclusive use of the original recipient as prescribed by Mercury Marine and may not be distributed or copied digitally or otherwise without the pri
3. e turned on the key on horn chirp will not sound and the e stop alarms will clear THE INFORMATION IN THIS DOCUMENT IS CONFIDENTIAL AND PROTECTED BY COPYRIGHT AND IS THE PROPERTY OF MERCURY MARINE This document is provided for the sole and exclusive use of the original recipient as prescribed by Mercury Marine and may not be distributed or copied digitally or otherwise without the prior written consent of Mercury Marine Page 4 5 2009 Mercury Marine MARCH 2009 2009 03 Power Steering Pump Module Electrical Troubleshooting Outboard Boat Mounted Pump Possible problem Multi engine power steering adapter harness Diagnostic procedure Remove the multi engine adapter harness Connect the power steering signal harness from the starboard outside engine directly to the power steering pump Turn the starboard outside key switch to the run position If the sister engines no longer power up with a single key switch the multi engine power steering adapter harness is the problem Replace as necessary Part number for replacement multi engine power steering adapter harness e Dual 892868T01 e Triple 892868T02 e Quad 892868T03 THE INFORMATION IN THIS DOCUMENT IS CONFIDENTIAL AND PROTECTED BY COPYRIGHT AND IS THE PROPERTY OF MERCURY MARINE This document is provided for the sole and exclusive use of the original recipient as prescribed by Mercury Marine and may not be distributed or copied digitally or otherwise without the prior w
4. le white Battery voltage key on and engine off Purple white White blue c With the engine running battery voltage should be present across the purple white and white blue wires as well as across the purple white and black wires THE INFORMATION IN THIS DOCUMENT IS CONFIDENTIAL AND PROTECTED BY COPYRIGHT AND IS THE PROPERTY OF MERCURY MARINE This document is provided for the sole and exclusive use of the original recipient as prescribed by Mercury Marine and may not be distributed or copied digitally or otherwise without the prior written consent of Mercury Marine 2009 03 MARCH 2009 2009 Mercury Marine Page 3 5 Power Steering Pump Module Electrical Troubleshooting Outboard Boat Mounted Pump DMT Meter Leads Power steering signal harness Purple white Battery voltage engine starts and runs Purple white White blue Battery voltage e Ifthese voltages are not observed as listed with a good battery and key switch harness check for the same voltages at the engine wire harness which connects to the signal harness If the listed voltages are still not present a problem may exist within the 3 wire circuit on the engine wire harness or the PCM With the PCM disconnected complete an ohms continuity check on these wires If the circuits have no shorts to ground and less than one ohm of resistance a PCM may be the problem NOTE Verado engines except 350 SCi Verado The power steering signal harness is located at the lower s
5. or written consent of Mercury Marine 2009 03 MARCH 2009 2009 Mercury Marine Page 1 5 Power Steering Pump Module Electrical Troubleshooting Outboard Boat Mounted Pum 3 Check for proper voltage across the power steering driver module To test break the connection point between the driver module and the power steering pump wiring a Power steering pump harness connector b Power steering driver module c Pin 1 blue white d Pin 2 purple a With the key in the off position no voltage should be present across the blue white to purple wire or across either of these wires to ground b With the key on and the engine off battery voltage must be present across the purple lead and the engine battery ground There should be less than 1 volt lt 1 volt across the blue white wire and battery ground Power steering driver module c With the engine running battery voltage should be present across the blue white lead and engine battery ground and across the purple lead to the engine battery ground fp Power steering driver module If these voltages are not observed as listed with a good battery and key switch harness continue with testing the power steering signal harness circuit THE INFORMATION IN THIS DOCUMENT IS CONFIDENTIAL AND PROTECTED BY COPYRIGHT AND IS THE PROPERTY OF MERCURY MARINE This document is provided for the sole and exclusive use of the original recipient as prescribed
6. ritten consent of Mercury Marine 2009 03 MARCH 2009 2009 Mercury Marine Page 5 5
7. tarboard side of the powerhead near the rigging tube NOTE 350 SCi Verado The power steering signal harness is combined with the 8 pin boat harness The power steering harness wiring colors match throughout the system Power Steering Module Primer Kit If the power steering pump is inoperable a great way to test the power steering pump directly is to utilize the power steering primer module to bypass the engine and all boat harnessing With battery power hooked to the power steering pump and the primer module installed a working power steering pump will operate when the two stage module is activated in the proper sequence See the instruction sheet supplied with the power steering primer module kit Power Steering Module Primer Kit 91 895040K01 Bleeds power steering system without running engine Troubleshooting Tips Multi engine boat rigged with Electro Hydraulic Power Steering Problem All engines power up with the activation of a single key switch NOTE On installations exhibiting these symptoms all engines will still start and run normally Symptoms e The key on systems check horn chirp will sound for all engines when the first key is turned on sounds like one horn sounding If only one key is turned on an e stop activated alarm will sound six intermittent beeps This is due to all the engines and or command modules being powered up but the remaining key switches are still in the off position e When the other keys ar
Download Pdf Manuals
Related Search