Prelude L4-2.2L SOHC (1994)
Power Steering Pressure Switch: Testing and Inspection
INSPECTION
1. Turn ignition switch off. Install test harness between the Programmed Fuel Injection Electronic Control Module (PGM-FI ECM) and the harness
connector. Turn ignition switch on.
PGM-FI ECM Connector Description And Wire Location
2. Measure voltage between terminal B8 (+) and A26 (-). Voltage should read less than 1.0 volt. If not, disconnect the two pin connector at the PSP
switch. Jump the two terminals together at the connector.
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If there is more than 1.0 volt, inspect for opens in RED/GREEN (+) wire and/or BLACK (-) wire.
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If there is less than 1.0 volt, replace the Power Steering Pressure (PSP) switch.
3. Start the engine. turn the steering wheel slowly. Measure the voltage between terminal B8 (+) and terminal A26 (-) while steering wheel is turning.
Voltage should read battery voltage. If not, disconnect the two pin connector at the PSP switch and measure the voltage between terminal B8 (+)
and terminal A26 (-).
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If voltage measures battery voltage, replace the PSP switch.
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If voltage measures less than 1.0 volt, inspect for short in RED/GREEN (+) wire between PGM-FI ECM and PSP switch and/or substitute
known good PGM-FI ECM and retest.
