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FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM
TROUBLESHOOTING METHOD
Engine starting problems, engine idling speed
problems, and medium and high-speed perfor-
mance problems
1. CHECK:
• Refer to "TROUBLESHOOTING" section in
the chapter 3.
2. Connect the FI diagnostic tool. (Refer to
"CONNECTING THE FI DIAGNOSTIC
TOOL".)
3. Check the fault code number. (Refer to
"TROUBLESHOOTING DETAILS".)
• Check the fault code number that is displayed
on the LCD of the FI diagnostic tool.
• Identify the system with the malfunction.(Re-
fer to "TROUBLESHOOTING DETAILS".)
4. Checking and repair the probable case of
malfunction.
• Fault code No. YES.
Check and repair.
Refer to "TROUBLESHOOTING DETAILS".
Refer to "SENSOR OPERATION TABLE".
• Fault code No. NO.
Check each sensor and actuator in the diag-
nostic mode.
Refer to "SETTING THE DIAGNOSTIC
MODE".
Refer to "SENSOR OPERATION TABLE".
If the sensors or actuators are damaged,
check and, if necessary, repair or replace all
faulty parts.
If the sensors or actuators are not damaged,
check and, if necessary, repair or replace
the engine inner parts.
5. Perform ECU reinstatement action.
Refer to "Reinstatement method" of table in
"TROUBLESHOOTING DETAILS".
6. Set the switch on the FI diagnostic tool sub-
wire harness from "OFF" to "ON", and then
check whether a fault code number is dis-
played again.
If other fault code displayed, repeat steps (2) to
(5) until all fault code number is not displayed.
7. Set the switch on the FI diagnostic tool sub-
wire harness to "OFF", and then disconnect
the FI diagnostic tool, FI diagnostic tool sub-
wire harness, and battery. Place the acces-
sory coupler in its original position.
The malfunction history is stored even if the
switch on the FI diagnostic tool sub-wire har-
ness is set to "OFF". Erase the malfunction his-
tory in the diagnostic mode. (Refer to
"DIAGNOSTIC CODE TABLE (Diagnostic code
No. D62)".)
CONNECTING THE FI DIAGNOSTIC TOOL
1. Connect the following items to the accesso-
ry coupler as shown.
• FI diagnostic tool "1"
• FI diagnostic tool sub-wire harness "2"
• Battery "3"
• Because this vehicle is not equipped with a
battery, a 12 V battery is required to use the
FI diagnostic tool.
• Make sure that the switch on the FI diagnos-
tic tool sub-wire harness is set to "OFF".
• The "POWER" LED (green) comes on.
FI diagnostic tool
YU-03182/90890-03182
FI diagnostic tool sub-wire harness
YU-03212/90890-03212