1998 Buick Lesabre hydralock

Tiny
BELLA08
  • MEMBER
  • 1998 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
Can anyone tell me what to do if the security light keeps flashing? I was told it goes into hydralock and cannot be fixed except by dealer. Whats the hydralock and can I fix it?
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Saturday, May 16th, 2009 AT 12:41 AM

2 Replies

Tiny
ZACKMAN
  • MEMBER
I don't know what your friend meant with hydralock. Your problem has something to do with your anti-theft system malfunctioning. And yes, the dealer is the only place that has Pass-Key II Interrogator to properly perform the diagnostic.

SECURITY Indicator Either Flashes Or Stays On Steady

1. Perform PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK. Using Interrogator (J 35628-A), check key to ensure valid key code is read. If key code is valid, go to next step. If key code is not valid, clean key and retest in interrogator. If a valid key code is now read, repeat PASS-Key II(R) DIAGNOSTIC SYSTEM CHECK. If a valid key code is not read, replace key. Repeat PASS-Key II(R) DIAGNOSTIC SYSTEM CHECK.
2. Disconnect PASS-Key II(R) 48-pin connector at base of steering column. Connect interrogator to ignition lock side of 48-pin connector terminals E13 (Purple/White wire) and E12 (White/Black wire). On all models, rotate lock cylinder through all positions while observing key code display (repeat 10 times). If display reads "E" for error or changes to another key code value at any position, replace ignition lock and keys. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK.
3. If display does not read "E" for error and does not change to another key code value, turn ignition off and disconnect interrogator. Using ohmmeter, measure resistance between ignition lock side of 48-pin connector terminals E13 (Purple/White wire) and E12 (White/Black wire), and ground.
4. If either resistance is 10 ohms or less, replace ignition lock and keys. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK. If resistance is more than 10 ohms, reconnect 48-pin connector at base of steering column. Using ohmmeter, measure resistance across key pellet and note reading. Insert key into ignition lock. Disconnect PASS-Key II(R) decoder module connector.
5. Using ohmmeter, measure resistance between PASS-Key II(R) decoder module connector terminals B7 (Purple/White wire) and B8 (White/Black wire). If resistance readings are not within 10 ohms of each other, check for poor connections at 48-pin connector at base of steering column. Also, repair damage to Purple/White wire or White/Black wire between PASS-Key II(R) decoder module and 48-pin connector as necessary. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK.
6. If resistance readings are within 10 ohms of each other, insert key into ignition lock, leaving switch in OFF position. Using ohmmeter, measure resistance between PASS-Key II(R) decoder module connector terminals B7 (Purple/White wire) and B8 (White/Black wire), and ground. If resistance is more than 5 ohms, go to next step. If resistance is 5 ohms or less, repair short to ground in Purple/White wire or Black/White wire between PASS-Key II(R) decoder module and 48-pin connector. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK.
7. Check PASS-Key II(R) decoder module grounds (Black/White wires). Repair as necessary. If Black/White wires are okay, reconnect PASS-Key II(R) decoder module connector. Try to start engine. If engine does not start, go to next step. If engine starts, check for poor connections at PASS-Key II(R) decoder module and 48-pin connector. Repair as necessary. If an intermittent problem is suspected, see NOTES ON INTERMITTENTS.
8. Turn ignition on and observe SECURITY indicator. If SECURITY indicator does not go out after 3 minutes, replace PASS-Key II(R) decoder module. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK. If SECURITY indicator goes out, attempt to start engine using a spare key. If engine starts, replace suspect key. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK. If engine does not start, replace PASS-Key II(R) decoder module. Repeat PASS-KEY II(R) DIAGNOSTIC SYSTEM CHECK.
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Monday, May 18th, 2009 AT 1:48 AM
Tiny
JOHNYELLE
  • MEMBER
Flashing check light means something serious. Hydralock means you are getting water all th eway to your catalytic converter. Head gasket leak.
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Sunday, July 12th, 2009 AT 9:15 PM

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