1991 LEXUS SC400 Service Repair Manual

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Page 2625 of 4087

$LEXUS SC400 1991 Service Repair Manual DIAGNOSTIC CODE CHART HINT: Parameters listed in the chart may not be exactly same as your reading \ due to type of the instruments or other factors. *4: See page TR±21. TR±14 ± ENGINE TROUBLESHOO$

Page 2626 of 4087

$LEXUS SC400 1991 Service Repair Manual If a malfunction code is displayed during the diagnostic code check in tes\ t mode, check the circuit for that code listed in the table below (Proceed to the page given for that circuit). Tro ble Are$

Page 2627 of 4087

LEXUS SC400 1991 Service Repair Manual
DIAGNOSTIC CODE CHART (Contd)
* 3, 4: See page TR±20, 21.
TR±16
±
ENGINE TROUBLESHOOTING Diagnostic Code Chart
WhereEverybodyKnowsYourName

Page 2628 of 4087

LEXUS SC400 1991 Service Repair Manual
ºCHECKº Engine
Tro ble Area
CHECK Engine
Warning Light *Memory*See PageTrouble AreaNormal
ModeTest
ModeMemory* See Page
w Open or short in water temp. sensor circuit.
w Water temp. sensor
w EC

Page 2629 of 4087

LEXUS SC400 1991 Service Repair Manual
DIAGNOSTIC CODE CHART (Contd)
TR±18±
ENGINE TROUBLESHOOTING Diagnostic Code Chart
WhereEverybodyKnowsYourName

Page 2630 of 4087

LEXUS SC400 1991 Service Repair Manual
Trouble Area
ºCHECKº
Engine Warning
Light *
Memory* See PageTrouble Area
Normal
ModeTest
Mode
MemorySee Page
w Open or short in air flow meter circuit.
w Air flow meter
w ECU
ONN.A.TR±88
wECU

Page 2631 of 4087

$LEXUS SC400 1991 Service Repair Manual DIAGNOSTIC CODE CHART (Contd) *1: ºONº displayed in the diagnosis mode column indicates that the º\ CHECKº Engine Warning Light islighted up when a malfunction is detected. ºOFFº indicates tha$

Page 2632 of 4087

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