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IAT (Intake Air Temperature) Sensor
DTC 10-1: Low IAT sensor voltage
1. Reappearance test
-1. Connect the HDS (Dr. H or Pocket Tester) (page 5-
1) and clear the DTC (page 5-2).
• If the DTC cannot be cleared, continue trou-
bleshooting.
-2. Turn the ignition switch ON.
-3. Check the IAT sensor voltage with the HDS (Dr. H
or Pocket Tester).
◆
Is there 0.078 ~ 4.922 V?
YES - Temporary failure (Disappears).
NO -
Go to the step 2.
2. IAT sensor (TA) circuit short-circuit inspection
-1. Turn the ignition switch OFF and disconnect the
ECM connector A and the IAT sensor 2P connector.
-2. Check for continuity between the No. 2 (Red/Yellow)
terminal of the IAT sensor wire harness side 2P con-
nector and the body ground.
◆
Is there continuity?
YES - Repair short circuit between the ECM and
IAT sensor.
NO -
Go to the step 3.
3. IAT sensor inspection
-1. Connect the ECM connector A and the IAT sensor
3P connector.
-2. Turn the ignition switch ON and check the IAT
(Intake Air Temperature) with the HDS (Dr. H or
Pocket Tester).
◆
Does it agree with temperature response curve?
YES - Recheck with a new ECM.
NO -
Replace the IAT sensor.
5-17
BF115A•BF130A
View from the terminal side
IAT SENSOR 2P CONNECTOR
(Wire harness side)
TA (RED/YELLOW)
