how can you tell the difference between issues with a crankshaft position sensor and issues with a neutral safety switch?
Mar 15, 2011 at 4:14 AM
'93 saab 900 wont start
1993 SAAB 900
VINNIEB
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neutral safety may not start in park but it should in neutral if park circuit is bad.
Mar 15, 2011 at 4:24 AM
and how would the crankshaft position sensor cause it to not start?
Mar 15, 2011 at 4:31 AM
not sure if this applies to your 900 as it was on a 9000 forum. "Step 3 ?Check the main relay-
Ignition OFF
Pop connector off DI cassette ? connect a test lamp between pins 10 and 6 of the cable side of the connector.
Remove fuse 23 for 5 seconds (or more), then re-insert.
Ignition ON ? the test lamp should light up for about 6 seconds and then go out.
Does it light up?
YES ? Main relay is OK.
NO ? Go to TEST 4(not Step 4) -Main relay check
Step 4 ? Crankshaft Position Sensor test.
From Step 3, Turn the key to START (from ON) to run the starter motor after the test lamp has gone out. It should light up again.
Does it light up?
YES ? Crankshaft position sensor is OK.
NO ? A problem with the Crankshaft sensor or connection to the control module."
Ignition OFF
Pop connector off DI cassette ? connect a test lamp between pins 10 and 6 of the cable side of the connector.
Remove fuse 23 for 5 seconds (or more), then re-insert.
Ignition ON ? the test lamp should light up for about 6 seconds and then go out.
Does it light up?
YES ? Main relay is OK.
NO ? Go to TEST 4(not Step 4) -Main relay check
Step 4 ? Crankshaft Position Sensor test.
From Step 3, Turn the key to START (from ON) to run the starter motor after the test lamp has gone out. It should light up again.
Does it light up?
YES ? Crankshaft position sensor is OK.
NO ? A problem with the Crankshaft sensor or connection to the control module."
Mar 15, 2011 at 5:21 AM
BASIC NEUTRAL SWITCH IF BAD U WILL NOT HEAR ENGINE CRANKING JUST SILENCE BUT MAY START WITH GEAR SHIFTER IN NEUTRAL ,NOTE MAY START , CRANKPOSITION SENSOR IF BAD U WILL HEAR ENGINE CRANKING BUT NO START ,GOOD LUCK.
Apr 29, 2011 at 2:19 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.