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Old 04-27-2009, 11:21 PM   #9
2NDSOUT
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Join Date: Sep 2000
Location: Cincinnati, Ohio
Posts: 7,334
 

1994 SL2
1999 SL
Default Re: 91 sc won't stay running

The Code 26 is Quad Driver Output Fault:

Coorelates to the following:

EGR Solenoid
EVAP Canister Purge Solenoid
Coolant Fan Relay
A/C Relay

From the FSM:

With Key in Ignition, Key ON; Engine OFF...note the telltale light and SES light.

Do lights come on and telltale lights go off?
If NO: Check circuits for Voltage (Fuses)...short to ground
If YES: Ground the ALDL (A and B Terminal with Paper Clip). Does Coolant Fan Relay come on?

If NO: Check circuits for Voltage(Fuses), short to ground.
If YES: Remove Grounding Jumper and turn on A/C.

Does A/C Clutch Operate?
If NO: Check Circuits for Voltage (Fuses) short to ground

If YES: Does Speedomemter Operate?

If NO: Check Circuits for Voltage Fuses short to ground.

If YES: Disconnect PCM and Ground Circuit 456.

Does Shift to D2 or Trac Control light up on dash?

If NO: Check Circuit for Fuse/Voltage short to ground
If YES: Measure voltage at Circuit 428 and 435 in PCM harness connector.

This should get you started. Did you have an EGR code with the 26? or Just the 41?

Try disconnecting the PCM fuse and see if this resets...along with following the above...this is the schematic directly from the FSM.
...
Bryan

94SL2 HCE, "Pearl"

99 SL

94SL2 260K Miles
1/15

97SW2 266K Miles
2/15

Always
94SC1 340,501 Miles
Org. Engine/Auto Trans
2/97-10/08
Gone 3/12

92SL1
05VUE
91SC
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