ENGINE DIAGNOSIS (RHZ ENGINE WITH SINGLE-CONNECTOR ECM) 6-39
1. Fuel temperature sensor
2. ECM
DTC P0180 FUEL TEMP. SENSOR CIRCUIT MALFUNCTION
WIRING DIAGRAM
DTC CONFIRMATION PROCEDURE
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze flame data by using scan tool and run engine
at idle speed for 10 sec. or more.
3) Check DTC and pending DTC by using scan tool.
TROUBLESHOOTING
STEP ACTION YES NO
1 Was “ENGINE DIAG. FLOW TABLE” performed? Go to Step 2. Go to “ENGINE DIAG.
FLOW TABLE”.
2 1) Remove intercooler referring to
“INTERCOOLER” in Section 6E3.
2) Disconnect fuel temp. sensor connector with
ignition switch OFF.
3) Check for proper connection to fuel temp. sensor
at “BLU/ORN” and “BRN” wire terminals.
4) If OK, check voltage between “BLU/ORN” and
“BRN” wire terminals with ignition switch ON.
Is voltage about 5 V?
Go to Step 3. “BLU/ORN” wire open
or shorted to
power/ground.
“BRN” wire open.
Poor C51-39 or
C51-22 connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
3 1) Check fuel temp. sensor for resistance referring
to “FUEL TEMPERATURE SENSOR” in Section
6E3.
Is resistance as specified?
Substitute a known-
good fuel temp.
sensor and recheck.
Replace fuel temp.
sensor.
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