LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Toyota
>>
1993
>>
Previa DX, AWD
>>
Repair and Diagnosis
>>
Engine Performance
>>
System
>>
Engine Controls - Tests W/Codes
>>
Diagnostic Code Charts
>>
Test No. 12 - Idle Speed Control Circuit
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Test No. 12 - Idle Speed Control Circuit
TEST NO. 12-IDLE SPEED CONTROL CIRCUIT TROUBLE
Terminal
Trouble
Condition
STD Voltage
ISC1-E1
No Voltage
Ignition Switch ON
8-14V
ISC2-E1
No Voltage
Ignition Switch OFF
8-14V
Fig 1: Test No. 12 Schematic Idle Speed Control Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Test No. 12 Component Diagram Idle Speed Control Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Test No. 12 Flow Chart Idle Speed Control Circuit
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002