NOTE: Do not replace the engine control module (ECM) until a through terminal check reveals there are no
short/open circuits.
NOTE: Check that the ECM ground circuit is normal before checking for the cause of the problem.
NOTE: After the ECM 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 of the heated oxygen sensor indicates the sensor mounted at a position closest to the
engine, and sensor 2 of the heated oxygen sensor indicates the sensor mounted at the position second clos-
est to the engine.

P2123*

Accelerator pedal position sensor (main) circuit high input

P.13A-677

P2127*

Accelerator pedal position sensor (sub) circuit low input

P.13A-682

P2128*

Accelerator pedal position sensor (sub) circuit high input

P.13A-687

P2135*

Throttle position sensor (main and sub) range/performance problem

P.13A-691

P2138*

Accelerator pedal position sensor (main and sub) range/performance problem

P.13A-697

P2195

Heated Oxygen Sensor (front) Inactive

P.13A-704

P2228*

Barometric pressure circuit low input

P.13A-707

P2229*

Barometric pressure circuit high input

P.13A-709

P2252

Heated oxygen sensor offset circuit low voltage

P.13A-711

P2253

Heated oxygen sensor offset circuit high voltage

P.13A-713

P2263

Intake charge system malfunction

P.13A-715

U0001

Bus off

P.13A-718

U0101* TC-SST-ECU time-out <TC-SST>

P.13A-719

U0121* ASC-ECU time-out

P.13A-723

U0141* ETACS-ECU time-out

P.13A-727

U0167

Immobilizer communication error

P.13A-731

U1180*

Combination meter time-out

P.13A-733

DTC

DIAGNOSTIC ITEM

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-48

SYMPTOM CHART

M1131151502711

CAUTION

During diagnosis, a DTC associated with other systems 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 learning process.
NOTE: Check that the ECM ground circuit is normal before checking for the cause of the problem.
NOTE: When the racing (3,000 to 5,000 r/min or more) continues on the vehicle stopped with no load during
the specified time or more, the increase in the engine speed might be limited. This comes from the engine
protection and control functions and is not a malfunction.

TROUBLE SYMPTOMS

INSPECTION
PROCEDURE

REFERENCE PAGE

Communication
with scan tool is
impossible

Communication with ECM only is not possible

P.13A-737

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

P.13A-741

The Malfunction Indicator Lamp (SERVICE
ENGINE SOON or Check Engine Lamp) remains
illuminated and never goes out

P.13A-742

Starting

Cranks, won't start

P.13A-744

Starts up and dies

P.13A-751

Hard starting

P.13A-755

Idling stability
(improper idling)

Unstable idle (rough idle, hunting)