Lexus SC300 / Lexus SC400. Service manual - part 77

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A304E (1UZ–FE) AUTOMATIC TRANSMISSION

TROUBLESHOOTING

MATRIX CHART OF PROBLEM SYMPTOMS

AT0LS–08

If a normal code is displayed during the diagnostic trouble code check but the trouble still occurs, check
the circuits for each symptom in the order given in the charts on the following pages and proceed to the
page given for troubleshooting.
The Matrix Chart is divided into 3 chapters.
Chapter 1: Electronic Circuit Matrix Chart
Chapter 2: On–vehicle Repair Matrix Chart
Chapter 3: Off–vehicle Repair Matrix Chart
In troubleshooting, check Chapter 1 first. If instructions are given in Chapter 1 to proceed to Chapter 2 or
3, proceed to it.

1. 

If the instruction “Proceed to next circuit inspection shown on matrix chart” is given in the flow
chart for each circuit, proceed to the circuit with the next highest number in the table to continue
the check.

2. 

If the trouble still occurs even though there are no abnormalities in any of the other circuits, then
check or replace the ECM.

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A304E (1UZ–FE) AUTOMATIC TRANSMISSION

TROUBLESHOOTING

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Chapter 1. Electronic Circuit

A T –

7
8

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8
2

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A

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OMA

TIC TRANSMISSION

TROUBLESHOOTING

AT–106

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AT–68

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IN–26

EG–580

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A304E (1UZ–FE) AUT

O

M

A

TIC TRANSMISSION

TROUBLESHOOTING

A

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