Lexus RX 400h: Problems & Solutions - READ ONLY

202 messages, Last post on Oct 25, 2006 at 6:35 AM

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What is this discussion about? Lexus RX 400h, Hybrid Cars, SUV

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#29 of 202 Possible cause of performance problems by rx400_owner Aug 08, 2005 (6:34 am)
Those of you experiencing poor performance might ask your dealers to try the ISC Learning proceedure which reinitializes the the idle speed control. It is in TSIB EG010-05. This is something that can be necessary if the 12 V battery dies (and possibly that happens during shipment or prep of some of the cars). Some of the things this can cause are poor fuel economy, engine running too often and excess noise at idle. The info came from a post on another board. It didn't say that it could cause the lurch some here have complained about, but it seems possible that engine idle being messed up might lead to that behavior as well. This or something like it would explain why our experiences with this car vary so widely.

#29 of 202: Possible cause of performance problems by rx400_owner; Aug 08, 2005 (6:34 am)

Those of you experiencing poor performance might ask your dealers to try the ISC Learning proceedure which reinitializes the the idle speed control. It is in TSIB EG010-05. This is something that can be necessary if the 12 V battery dies (and possibly that happens during shipment or prep of some of the cars).

Some of the things this can cause are poor fuel economy, engine running too often and excess noise at idle.

The info came from a post on another board. It didn't say that it could cause the lurch some here have complained about, but it seems possible that engine idle being messed up might lead to that behavior as well.

This or something like it would explain why our experiences with this car vary so widely.