5-10
BF115A•BF130A
●
ECT (Engine Coolant Temperature) Sensor 1
(ECT Sensor 1: Identified as ECT Sensor in the base
shop manual.)
DTC 6-1: Low ECT sensor 1 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 ECT sensor 1 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. ECT sensor 1 circuit (TE) short-circuit inspection
-1. Turn the ignition switch OFF and disconnect the
ECM connector A and ECT sensor 1 connector.
-2. Check for continuity between the No. 2 (Red/White)
terminal of the ECT sensor 1 wire harness side 2P
connector and the body ground.
◆
Is there continuity?
YES - Repair short circuit between the ECM and
ECT sensor 1.
NO -
Go to the step 3.
3. ECT sensor 1 inspection
-1. Connect the ECM connector A and the ECT sensor
1 connector.
-2. Turn the ignition switch ON and check the engine
temperature with the HDS (Dr. H or Pocket Tester).
◆
Does it agree with actual engine temperature?
YES - Recheck with a new ECM.
NO -
Replace the ECT sensor 1.
View from the terminal side
ECT SENSOR 1 2P CONNECTOR
(Wire harness side)
TE (RED/WHITE)
