High Engine Idle Speed (No Drop) - Toyota 7M-GE Repair Manual

.20
EFI SYSTEM - Troubleshooting __
SYMPTOM
- HIGH ENGINE IDLE SPEED (NO DROP)
:HECK ACCELERA
OK
CHECK POWER STEERING !DLE+JP
SYSTEM
OK .
':
j..l.
CHECK DIAGNOSIS SYSTEM
Check for output of diagnostic code.
(See page FI-26) ':.
_T I
Linkage - Stuck
I
9
BAD
* Air valve
I
r
* Diagnostic code(s) (See pages FI-30, 31, 32)
Malfunction
..
code!s)
Normal code
.
CHECK ISC SYSTEM
BAD
I
OK
71
(Air con Throttle posrtron sensor - ECU)
1
CHECK THROTTLE POSITION SENSOR
t-x-
Throttle body
OK
CHECK FUEL PRESSURE
(See page FI-74)
7
BAD
w Fuel pressure regulator - High pressure
OK
CHECK COLD START INJECTOR
~ .ee page FI-80)
BAD
w Cold start injector - Leakage
CHECK INJECTORS (See page FI-86)
I
Injectors - Leakage, Injection quality
I
OK
CHECK EFI ELECTRONIC CIRCUIT USING
VOLT/OHMMETER
(See pages FI-34, 57)
BAD
- 1. Wiring connection
2. Power to ECU
(1) Fusible links
(2) Fuses
(3) EFI main relay
3. Air flow meter
4. Water temp. sensor
5. Air temp. sensor
6. Injection signal circuit
(1) Injector wiring
(2) Resistor
(3) ECU