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Troubleshooting information. 1. Check the engine oil level. Is the level ok? Yes- go to step 2 . No- adjust the engine oil to the proper level, then go to step 14 . 2. Turn the ignition switch on (ii). 3. Clear the dtc with the hds. 4. Do the vtec test in the inspection menu with the hds. Is the result ok? Yes- intermittent failure, system is ok at this time. Check for poor connections or loose terminals at the rocker arm oil pressure switch (vtec oil pressure switch) and the ecm/pcm. No- go to step 5 . 5. Check the result of step 4 . Rocker arm oil pressure switch (vtec oil pressure switch) failure rocker arm oil pressure switch (vtec oil pressure switch) open rocker arm oil pressure switch (vtec oil pressure switch) sig line open rocker arm oil pressure switch (vtec oil pressure switch) gnd line open is the test result any of the above? Yes- go to step 6 . No- check for poor connections or loose terminals at the rocker arm oil pressure switch (vtec oil pressure switch). If it is ok, replace the rocker arm oil control solenoid (vtec solenoid valve) (see step cmp sensor a replacement ), then go to 14 . 6. Turn the ignition switch off. 7. Disconnect the rocker arm oil pressure switch (vtec oil pressure switch) 2p connector. 8. Check for continuity between rocker arm oil pressure switch (vtec oil pressure switch) 2p connector terminals no. 1 and no. 2. Virtual wrench

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1. Do the engine control module (ecm)/powertrain control module (pcm) reset procedure (see how to reset the ecm/pcm ). 2. Start the engine. 3. Warm up the engine to normal operating temperature (cooling fan comes on). 4. Road test the vehicle: accelerate in 1st gear to an engine speed over 4,000 rpm. Hold that engine speed for at least 2 seconds. If dtc p1259 is not repeated during the first road test, repeat this test two more times. Is dtc p1259 indicated? Yes – go to step 5. No – intermittent failure, system is ok at this time. Check for poor connections or loose wires at vtec solenoid valve and ecm/pcm. 5. Turn the ignition switch off. 6. Disconnect the vtec oil pressure switch 2p connector. 7. Check for continuity on the vtec oil pressure switch between the pressure switch 2p connector terminals no. 1 and no. 2.

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Repair procedure a 1. Connect the hds to the vehicle’s dlc. 2. Start the engine, and turn on the hds. 3. When prompted, enter the vin and the odometer reading. 4. From the system selection menu screen, select pgm-fi. 5. From the mode menu, select data list. 6. Scroll down the list to psp switch. Watch the reading in the value column. 7. Check for a broken power steering pressure switch wire by wiggling the p/s pressure switch wire harness at the switch while you check the value column reading. • if the reading changes between on and off when you wiggle the harness, go to step 8. • if the reading does not change between on and off when you wiggle the harness, go to repair procedure b. 8. Raise the vehicle on a lift, and remove the right front wheel to access the power steering pressure switch. 9. Disconnect the connector from the switch, and release the harness clip from the body. Note: you may need to disconnect the secondary ho2s connector to free the end of the harness from the body.

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Repair procedure – power steering switch 1. Drain the power steering fluid out of the system. 2. Remove the power steering fluid reservoir. Clean the reservoir with solvent, then with soap and water. Rinse and dry it thoroughly. 3. Reinstall the reservoir. Do not connect the return hose. 4. Look at the power steering pump pulley to determine if it is held on the shaft with a nut, or is pressed on and has no nut. • if the pulley is held on with a nut (some 1998 models), continue to step 5. • if the pulley is pressed on, go to step 7. 5. Remove the power steering pressure switch from the power steering pump. 6. Install the new power steering pressure switch. Torque it to 20 n·m (14 lb-ft). Go to step 8. 7. Remove the power steering pressure switch, then clean it with brake cleaner and a scraper. Reinstall the switch, and torque it to 20 n·m (14 lb-ft). Your finger, then fill the reservoir with dexron iiI atf. 9. Place the end of the return hose in a container. Have someone start the engine, then pour atf into the reservoir while you watch the fluid coming out of the return hose. When the fluid coming out is the same color as the new fluid, turn off the engine. 10. Reconnect the return hose to the reservoir. 11. Start the engine. Fill the power steering reservoir to the proper level with atf, then turn off the engine. 12. Use the smart cable to reprogram the pcm with the latest software from the june 2000 or later hondanet cd-rom. Refer to service bulletin 99-005, updating the passport pcm, filed under tools. 13. Use the pgm tester to clear any dtcs. 14. Use the pgm tester to check the broadcast code. Make sure the broadcast code matches the one you selected from the cd-rom.

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Honda accord/prelude 1984-1995 in-tank fuel pumps test 1. Turn the ignition off. 2. On the accord, remove the screws securing the underdash fuse box to its mount. Remove the fuel cut‐off relay from the back of the fuse block and turn the block so you can see the relay mount. Use a jumper wire to connect the two left‐most terminals of the relay mount (terminal 1 to terminal 2). 3. On preludes, remove the dashboard under cover; remove the fuel cut‐off relay from the fuse block. Use a jumper wire to connect the top 2 terminals (terminals 1 and 2) of the relay mount. 4. Disconnect the fuel line at the fuel filter in the engine compartment. Connect a pressure gauge to the fuel line. 5. Turn the ignition key on until pressure on the gauge stabilizes, then turn the key off. 6. Pressure should be between 2.6‐3.3 psI (18‐22.7 kpa). If the pressure shown is below minimum, the pump must be replaced. If pressure is at least minimum, continue with the test. 7. Remove the pressure gauge from the fuel line; hold the line in a quart container. Have an assistant turn the ignition switch on for 60 seconds, then shut it off. 8. Fuel flow in 60 seconds must be at least 25.7 oz. (760 cc). 9. If fuel pump volume is below specification, the pump must be replaced. 10. Remove the jumper wire at the fuse block. Reinstall the fuel cut‐off relay. Reinstall the fuse block on its mount. Carbureted fuel system