Power Steering Pressure (Psp) Switch Signal - Honda Prelude 1993 Service Manual

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This signals the ECM when the power steering load is high.
Inrp.clion ol PSP twltch Signal
Connect the t€st harnes6 between
the ECM and connectors (see
p a g e 1 1 - 4 5 ) .
Tu.n tho ignilion swilch ON.
Moasure voltage b€tween 88 {+}
torminsl and A26 (-l terminsl.
Disconnect the 2P connector from
the PSP switch.
ls rhere more than 1.0 V?
ls ther6 more than 1.0 V?
Tum rtaaring whool slowly.
M66sure voltage betw66n BB (+)
t6rminal and A26 {-} torminsl
whilo stggring wheel is turning.
Repair opon in RED/GRN wir6 b6-
tw6on ECM (88) snd PSP switch
or BLK wir. bolwog.i PSP .wilch
a n d G l O l .
ls there battery voltage?
Disconnect the 2P conneclor from
the PSP switch.
PSP 3wirch slgnal i! OK.
Measure voltage between 88 {+ )
terminal and 426 l- l terminal.
ls there battery voltage?
Rooair shon in RED/GRN wilo bo-
twoon ECM {88) and P1SP switch.
lI wire is OK, substituto a known-
good ECM and rochock. lf
proscdbod voltege ir now availa-
bl6, roplace tho original ECM.
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swtTcH
ldle Control System
Troubleshooting Flowchart
Power Steering Pressure (PSP) Switch Signal
1 1 - 1 0 8