Mechanics

TRACTION LIGHT STAYS ON

1992 Lexus LS 400

Suspension problem
1992 Lexus LS 400 V8 Front Wheel Drive Automatic 90501 miles

My traction light stays on and when it comes on so does the check engine light. And also my normal suspension light blinks and when switching it over to sport ride my vehicle suspension does not go up or down. I just recently purchased this vehicle and the air suspension fuse had been taken out, and every since I replaced it yesterday the normal light has been blinking, So could u please help me solve these problems? Thank You in advance.

Byrone Lake
Avatar
Lake364
May 14, 2010.




Hi Byrone ,

Thank you for the donation and sorry for the delay in replying.

When the CEL comes on, the Traction light would also indicate.

You need to retrieve the trouble codes to understand what is causing the problem. The CEL takes precedence over other trouble codes.

Here are the diagnostic procedures, let me know the trouble code so we can proceed from there.

RETRIEVING CODES
Normal Mode

1. Normal mode is used for routine testing of vehicle. To read diagnostic codes, ensure battery voltage is at least 11 volts, throttle valve is fully closed, transaxle/transmission is in Neutral and all accessories are off.

2. Total Diagnostic Communication Link (TDCL) connector is located under left side of instrument panel. See Fig. 1 . Diagnostic codes can be obtained through TDCL connector or check connector. On ES300, check connector is located in engine compartment near right shock tower. Check connector is located near top front of engine. See
Fig. 2 .

3.Turn ignition on. DO NOT start engine. Using a jumper wire, connect terminals E1 and TE1 together either on TDCL connector or check connector. See Fig. 3 . Count number of flashes from CHECK ENGINE light.

4. If CHECK ENGINE light flashes 2 times every second, system is normal. If a diagnostic code is displayed, first group of flashes will indicate first digit of a 2-digit diagnostic code. After a 1.5 second delay, second group of flashes will indicate second digit of diagnostic code.

5. If more than one code is stored, a 2.5 second delay will occur between diagnostic codes. After all diagnostic codes have been displayed, a 4.5 second delay will occur and then codes will be repeated until jumper wire connecting terminals E1 and TE1 is disconnected. Diagnostic codes will display from smallest to largest number.

6. Record diagnostic codes.

Test Mode

1. This mode detects same malfunctions as normal mode. It also detects malfunctions in starter signal circuit, No. 1 and No. 2 cam position sensors (if equipped), idle contact signal of TPS, A/C signal and neutral start switch signal. Test mode is more sensitive to intermittent and regular faults and is used for road test conditions.

2. To read diagnostic codes, ensure battery voltage is at least 11 volts, throttle valve is fully closed, transmission is in Neutral and all accessories are off. Total Diagnostic Communication Link (TDCL) connector is located under left side of instrument panel. See Fig. 1 .

3.Turn ignition off. Using a jumper wire, connect terminals E1 and TE2 together on TDCL connector. See Fig. 3 . Turn ignition on. DO NOT start engine.

NOTE:
If terminals E1 and TE2 are connected after ignition is turned on, test mode will not start.

4. When ignition is turned on, CHECK ENGINE light on instrument panel should flash.

5. Start engine. Perform road test and simulate conditions described by customer. DO NOT disconnect jumper wire connecting terminals E1 and TE2. After road test, connect terminals E1 and TE1 together on TDCL connector using a jumper wire.

6. Count number of flashes from CHECK ENGINE light. System is normal if CHECK ENGINE light flashes 2 times every second. If a diagnostic code is displayed, first group of flashes will indicate first digit of a 2-digit diagnostic code. After a 1.5 second delay, second group of flashes will indicate second digit of diagnostic code.

7. If more than one code is stored, a 2.5 second delay will occur between diagnostic codes. After all diagnostic codes have been displayed, a 4.5 second delay will occur and then codes will be repeated until jumper wire connecting terminals E1 and TE1 is disconnected. Diagnostic codes will display from smallest to largest number.

8. After completing check, disconnect terminals TE1 and TE2 from terminal E1 on TDCL connector. Diagnostic Codes 17, 18 and 43 will set if engine is not cranked when entering test mode. This is normal. This is normal. If automatic transmission is in "D", 2, "L" or "R", A/C switch is in ON position or accelerator pedal is depressed, Code 51 will set. This is normal.

9. Record diagnostic codes.


http://www.2carpros.com/forum/automotive_pictures/192750_TDLC92LexusLS400Fig01_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_TDLC92LexusLS400Fig02_1.jpg



http://www.2carpros.com/forum/automotive_pictures/192750_TDLC92LexusLS400Fig03_1.jpg




KHLow2008
May 21, 2010.


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