5-87
5. ECT sensor 3 check
-1. Turn the ignition switch OFF and disconnect the ECT
sensor 3 2P connector.
-2. Measure the resistance between the No.1 and No.2
terminals of the ECT sensor 3 side 2P connector.
Is there the resistance corresponding to the engine
coolant temperature?
YES –
Substitute a known-good ECM and recheck.
NO –
Replace the ECT sensor 3.
• EOP switch (High Pressure Side)
Troubleshooting
MIL blinks 26 times
1. Symptom reproduction test
-1. Reset the ECM.
-2. Turn the ignition switch OFF and connect the test har-
ness.
• Hold the sensor connector connected.
-3. Turn the ignition switch ON.
-4. Measure the voltage between the test harness A-17
terminal (+) and A-2 terminal (–).
Is the voltage 0V (OFF signal)?
YES –
Temporary failure (Disappeared)
NO –
Perform "2. EOP switch signal line open cir-
cuit check".
2. EOP switch signal line open circuit check
-1. Turn the ignition switch OFF and disconnect the EOP
switch 2P connector.
-2. Turn the ignition switch ON.
Measure the voltage
between the No.1 (Yellow/Red) terminal of the EOP
switch harness side 2P connector and the body
ground.
Is there the battery voltage?
YES –
Perform “3. EOP switch signal line short circuit
check”.
NO –
Repair open in the wire between the EOP
switch and the ECM.
BF135A•BF150A
RESIST
ANCE
ECT SENSOR 3 SIDE
2P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
ENGINE COOLANT TEMPERATURE
A-2
A-17
EOP SWITCH HARNESS SIDE 2P
CONNECTOR
VIEWED FROM THE TERMINAL SIDE
OPSH (YELLOW/RED)