MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-37
NOTE: Do not replace the powertrain control module (PCM) until a through terminal check reveals there are
no short/open circuits.
NOTE: Check that the PCM ground circuit is normal before checking for the cause of the problem.
NOTE: After the PCM detects a malfunction, a diagnostic trouble code is recorded the next time the engine is
started and the same malfunction is re-detected. However, for items marked with a "*", the diagnostic trouble
code is recorded on the first detection of the malfunction.
NOTE: Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates the
sensor mounted at the position second closest to the engine.
NOTE: Bank 1 indicates the right bank side cylinder, and Bank 2 indicates the left bank side cylinder.
SYMPTOM CHART
M1131151500726
CAUTION
During diagnosis, a DTC associated with other
system may be set when the ignition switch is
turned on with connector(s) disconnected. On
completion, confirm all systems for DTC(s). If
DTC(s) are set, erase them all.
CAUTION
Disconnecting the battery cables or removing the
combination meter will erase the learned value of
the fuel gauge. To recover the learned value,
input a vehicle speed (by actually driving the
vehicle or inputting a simulated vehicle speed),
and stop the vehicle. This will complete the learn-
ing process.
.
NOTE: Check that the PCM ground circuit is normal
before checking for the cause of the problem.
U1102
ABS
−ECU time−out
P.13B-951
U1108*
Combination meter time
−out
P.13B-955
U1110
A/C
−ECU time−out
P.13B-960
DTC
DIAGNOSTIC ITEM
REFERENCE
PAGE
TROUBLE SYMPTOMS
INSPECTION
PROCEDURE
REFERENCE PAGE
Communication
with scan tool is
impossible
Communication with all systems is not possible
1
P.13B-965
Communication with PCM only is not possible
2
P.13B-968
Malfunction
Indicator Lamp
(SERVICE
ENGINE SOON
or Check
Engine Lamp)
and related
parts
The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) does not illuminate
right after the ignition switch is turned to the "ON"
position
3
P.13B-971
The Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) remains illuminated
and never goes out
4
P.13B-972
Starting
Cranks, won't start
5
P.13B-974
Starts up and dies
6
P.13B-981
Hard starting
7
P.13B-988