6-1-12
ENGINE DIAGNOSIS (RHZ ENGINE WITH TRIPLE-CONNECTOR ECM)
DTC P0101 (P0100) MAF SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM
WIRING DIAGRAM
Refer to DTC P0100.
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
D
Intake air temp.: – 8
_
C, 18
_
F or higher
D
Engine coolant temp.: – 8 – 110
_
C (18 – 230
_
F)
D
Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
1) Connect scan tool to DLC with ignition switch OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run engine
at idle speed for 10 sec. or more.
3) Then run engine over 3000 rpm for 10 sec. or more.
4) Check DTC and pending DTC.
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 ECM (PCM) cover referring to “Voltage
Check” in this section.
2) Start engine and check voltage between E228-29
and E228-30 terminals.
Engine speed at 3000 rpm: about 3.1 V
Engine speed at idling: about 2 V
Is each value satisfied?
Intermittent trouble or
faulty ECM.
Check for intermittent
referring to
“Intermittent and Poor
Connection” in
Section 0A.
(See NOTE.)
Clogged or leaky air
intake system.
If all are OK, substitute
a known-good MAF
sensor and recheck.
NOTE:
If DTC is checked using generic scan tool only and DTC P0100 (P0100) Diag. Flow Table is not performed
yet, go to the table before ECM replacement.
