BF135A•BF150A
5-81
5. BARO sensor ground line open circuit check
-1. Turn the ignition switch ON.
Measure the voltage
between the No. 1 (Green/Red) terminal of the BARO
sensor harness side 3P connector and the engine
ground.
Is there the continuity?
YES –
Perform "6. BARO sensor check".
NO –
Repair open in the wire between the BARO
sensor and the engine ground.
6. BARO sensor check
-1. Turn the ignition switch ON.
-2. Measure the voltage between the A-5 terminal (+) and
the A-2 terminal (–) of the test harness.
Is the measurement 2.76 – 2.96V?
YES –
Substitute a known-good ECM and recheck.
NO –
Replace the BARO sensor and recheck.
• IAC Valve Troubleshooting
MIL blinks 14 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. Start the engine.
Check the engine speed during
idling.
Is the engine speed 650 rpm or above?
YES –
Temporary failure (Disappeared)
NO –
Perform "2. IAC valve open circuit check".
2. IAC valve open circuit check
-1. Turn the ignition switch OFF and disconnect the IAC
valve 2P connector.
-2. Measure the resistance between the IAC valve No. 1
and the No. 2 terminals.
Is the resistance 8 – 12
?
YES –
Perform "3. IAC valve short circuit check".
NO –
Replace the IAC valve.
3. IAC valve short circuit check
-1. Check for the continuity between the IAC valve No. 1
terminal and the body ground.
Is there the continuity?
YES –
Replace the IAC valve.
NO –
A-2
A-5
BARO SENSOR HARNESS SIDE
3P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
IAC VALVE SIDE
2P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
IAC VALVE SIDE
2P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
SG2
(GREEN/RED)