MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-253
STEP 1. Using scan tool MB991502, check data list item 12:
Volume Air Flow Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item
12, Volume Air Flow Sensor.
(4) Warm up the engine to normal operating temperature: 80
°
C
to 96
°
C (176
°
F to 205
°
F).
•
When idling, between 17 and 46 Hz (between 2.2 and
5.7 g/s).
•
When 2,500 r/min, between 63 and 103 Hz (between
9.0 and 14.7 g/s).
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES :
Go to Step 2.
NO :
Refer to DTC P0101
−
Volume Air Flow Circuit
Range/Performance Problem
, DTC P0102
−
Volume Air Flow Circuit Low Input
STEP 2. Using scan tool MB991502, check data list item 13:
Intake Air Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991502 to the data reading mode for item
13, Intake Air Temperature Sensor.
•
The intake air temperature and temperature shown with
the scan tool should approximately match.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES :
Go to Step 3.
NO :
Refer to DTC P0111
−
Intake Air Temperature Circuit
Range/Performance Problem
, DTC P0112
−
Intake Air Temperature Circuit Low Input
DTC P0113
−
Intake Air Temperature Circuit High
Input
.
AKX01177
16 PIN
MB991502
AB
AKX01177
16 PIN
MB991502
AB
