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Discussion Starter · #1 ·
I have an '89 765 turbo. Sometimes on start up the overdrive arrow and the SRS warning light come on. The windows, radio, sunroof etc won't function. Usually I can shut it off and re-start and all is OK. Anyone have any ideas as to the cause?
 

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Re: srs and overdrive light (volvoman9)

Some guesses...<p>Loose fuse connection(s).<br>Failing ignition switch.<br>Intermittent electrical ground connection(s).<br>Deteriorated electrical wiring, junctions and connections.<p>Does the car have OBD?<p>George Dill
 

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Re: srs and overdrive light (gdill2)

I don't believe so. I never could find anything resembling a port.
 

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Re: srs and overdrive light (volvoman9)

I'd say its the ignition switch failing. When your car is started, try gently moving the key to the left...should only move a few millimeters, but might clear the problem up. My 90 744ti has the same problem, everytime I start it, I have to turn the key back about 2 millimeters to get everything right. <p>As far as OBD, you don't need a port. Your car should have LH 2.4, and there will be a small black box inside the engine compartment right next to the driver's side hood hinge. Remove said cover from box and plug the little tip into one of the holes. Press the button on the box for longer than 1 second, but less than 3. It will then start to flash series of lights. Each code is 3 numbers, so there will be 3 sets of flashes with a slight pause in between. Here is the list of codes. Credit to Frpe82 on Turbobricks for em.<p><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote »</i></TD></TR><TR><TD CLASS="quote">LH2.4 Fuel Injection Fault Codes (DTC):<p>Socket position 2.<p>(The * means that the CEL is lit)<p>1-1-1 No faults detected.<br>1-1-2 Fault in control module.<br>1-1-3* Short-term fuel trim. Faulty control. Fuel trim (lambda control) too lean or rich.<br>1-2-1* Mass air flow (MAF) sensor signal. Faulty signal to/from Air Mass Meter.<br>1-2-3* Engine coolant temperature (ECT) sensor. Signal missing to/from coolant temp. sensor.<br>1-3-1 Engine speed signal from ignition system. Signal missing.<br>1-3-2 Battery voltage. Battery voltage too low/high.<br>1-3-3 Throttle position (TP) switch at engine idle. Throttle switch idle setting faulty or grounding fault.<br>2-1-2* Heated oxygen sensor (HO2S) signal. Faulty or missing signal.<br>2-1-3 Throttle position (TP) switch at full load. Faulty or missing signal.<br>2-2-1* Long-term fuel trim, part load. Lean part load.<br>2-2-3 Idle air control (IAC) valve signal. Faulty or missing signal.<br>2-3-1* Fuel trim (lambda control) too lean or too rich at part load.<br>2-3-2* Fuel trim (lambda control) too lean or too rich at idle.<br>3-1-1 Vehicle speed signal (VSS). Faulty or missing signal. (Also signal from speedometer).<br>3-1-2 Knock enrichment signal from ignition system. Faulty signal.<br>3-2-2 Mass air flow sensor (MAF). Air Mass Meter wire burn-off signal absent or faulty.<br>3-4-4 Exhaust gas temperature sensor. Faulty.<p>EZK 116 Ignition Fault Codes (DTC):<p>Socket position 6.<p>(The * means that the CEL is lit)<p>1-1-1 No faults detected.<br>1-4-2* Fault in control module.<br>1-4-3* Knock sensor (KS) signal. Faulty or missing signal.<br>1-4-4* Load signal. Faulty or missing signal.<br>1-5-4* EGR. EGR system flow too high.<br>2-1-4 Engine speed (RPM) sensor. Intermittently absent.<br>2-2-4 Engine coolant temperature (ECT) sensor. Faulty or missing signal.<br>2-3-4 Throttle position (TP) switch signal. Faulty or missing signal.<br>2-4-1* EGR (NTC). EGR system flow too low.<br>2-4-1* EGR (PTC). EGR system flow too low.<br>4-1-3* EGR temperature sensor signal (NTC). Faulty or missing signal.<br>4-1-3* EGR temperature sensor signal (PTC). Faulty or missing signal.<p>Special Fault Codes (DTC):<p>ABS Fault Codes (DTC):<p>Socket position 3.<p>1–1–1 No fault detected<br>1–2–5 Faulty signal from at least one wheel sensor<br>1–3–5 Fault in control module<br>1–4–2 Brake light switch, open circuit<br>1–5–1 L/H front wheel sensor, open or short–circ. to supply<br>1–5–2 R/H front wheel sensor, open or short–circ. to supply<br>1–5–5 Rear axle sensor, open or short–circ. to supply<br>2–1–5 Valve relay, open–circuit or short–circuit<br>2–3–1 L/H front wheel sensor, signal absent<br>2–3–2 R/H front wheel sensor, signal absent<br>2–3–5 Rear axle sensor, signal absent<br>4–1–1 L/H front wheel valve, open or short–circ.<br>4–1–3 R/H front wheel valve, open or short–circ.<br>4–1–5 Rear valve open or short–circ.<br>4–4–3 Pump motor/relay electrical or mechanical fault<p>TCU Fault Codes (DTC):<p>Socket position 5.<p>2-4-2 Turbo control valve. Open-circuit or shorted.<br>3-1-2 Knocking information. Signal faulty.<br>3-4-2 A/C blocking relay. Signal faulty.<br>4-2-1 Pressure sensor. Faulty boost pressure.<br>4-2-2 Exhaust gas temperature controller. Signal faulty.<br>4-2-3 Throttle position sensor. Signal faulty.<br>4-2-4 Load signal. Signal faulty.<br>4-3-1 Temperature sensor. Signal missing.<p></TD></TR></TABLE><p>Good luck
 

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Discussion Starter · #6 ·
Re: srs and overdrive light (Krepotkin)

You were right. The ignition is the issue. Years of my wife's appendages on the key ring.
 
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