MPI <4G6> -
Troubleshooting
13A-88
INSPECTION PROCEDURE USING AN
ANALYZER
On vehicles with A/T, the ECU controls the engine and the
transmission comprehensively (This is called engine-A/T-
ECU). Due to this, the following describe only the inspection
procedures at the engine-A/T-ECU terminals. On vehicles
with M/T, the ECU (engine-ECU) has not been changed, so
the inspection procedures at the ECU terminals are the same
as before.
AIR FLOW SENSOR
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 65.
CAMSHAFT POSITION SENSOR AND CRANK ANGLE
SENSOR
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 56. (When checking the
camshaft position sensor signal wave pattern.)
2. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 45. (When checking the crank
angle sensor signal wave pattern.)
INJECTOR
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 1. (When checking the No. 1
cylinder.)
2. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 9. (When checking the No. 2
cylinder.)
3. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 24. (When checking the No.
3 cylinder.)
4. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 2. (When checking the No. 4
cylinder.)
IDLE SPEED CONTROL SERVO (STEPPER MOTOR)
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 14, connection terminal 28,
connection terminal 15, and connection terminal 29
respectively.
IGNITION COIL AND POWER TRANSISTOR
Alternate method (Test harness not available)
1. Connect the analyzer special patterns pickup to
engine-A/T-ECU terminal 11 (No. 1 - No. 4), terminal
12 (No. 2 - No. 3) respectively
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