The PCM monitors the ECT sensor No.1 signal. If the PCM detects that the ECT sensor No.1 voltage is above 4.94 V for 5 s
, the PCM determines that the ECT sensor No.1 circuit has a malfunction.
Diagnostic support note
This is a continuous monitor (engine cooling system).
The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
The DTC is stored in the PCM memory.
POSSIBLE CAUSE
ECT sensor No.1 connector or terminals malfunction
ECT sensor No.1 malfunction
PCM connector or terminals malfunction
Short to power supply in wiring harness between ECT sensor No.1 terminal A and PCM terminal 2AC
Open circuit in wiring harness between the following terminals: