Mitsubishi Montero (2004+). Manual — part 324

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-783

STEP 8. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2128 set?

YES : Retry the troubleshooting.
NO : The inspection is complete.

DTC P2135: Throttle Position Sensor (Main and Sub) Range/Performance Problem

.

Throttle Position Sensor (Main and Sub)
Range/Performance Problem Circuit

• Refer to DTC P0122 − Throttle Position Sensor

(Main) Circuit

P.13A-138

.

• Refer to DTC P0222 − Throttle Position Sensor

(Sub) Circuit

P.13A-433

.

.

CIRCUIT OPERATION

• Refer to, DTC P0122 − Throttle Position Sensor

(Main) Circuit

P.13A-138

.

• Refer to, DTC P0222 − Throttle Position Sensor

(Sub) Circuit

P.13A-433

.

.

TECHNICAL DESCRIPTION

• PCM checks the throttle position sensor output

signal characteristics for abnormal conditions.

.

DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between throttle

position sensor (main) and throttle position sen-
sor (sub) is wrong.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

AK302970

AB

MB991911

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-784

DTC SET CONDITION <Range/Performance problem

− relation between main and sub>

Logic Flow Chart

.

Check Conditions

• Ignition switch "ON" position.

• Throttle position sensor (main) output voltage is

between 0.35 and 2.5 volts.

• Throttle position sensor (sub) output voltage is

between 2.25 and 4.8 volts.

Judgement Criteria

• Voltage obtained with the formula given below is

0.3 volt or higher for 0.5 second: throttle position
sensor (main) output voltage

− [throttle position

sensor (sub) output voltage

− 2 volts]

.

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 0.5sec

|

TPS (MAIN) - (TPS (SUB)-2.0V)

|

> =0.3V

MONITORING

CONDITIONS

AK302964

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-785

DTC SET CONDITIONS <Range/Performance problem

− relation between main and sub>

Logic Flow Chart

.

Check Conditions

• Ignition switch "ON" position.

• Throttle position sensor (main) output voltage is

between 2.5 and 4.8 volts.

• Throttle position sensor (sub) output voltage is

higher than 2.25 volts.

Judgement Criteria

• Throttle position sensor (sub) output voltage is

4.2 volts or lower.

.

OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function

− OBD-II Drive Cycle −

Procedure 6

− Other Monitor

P.13A-4

.

.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

• Throttle position sensor failed.

• Shorted throttle position sensor circuit, or con-

nector damage.

• PCM failed.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 0.5sec

TPS (SUB) < =4.2V

MONITORING

CONDITIONS

AK302965

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-786

STEP 1. Check harness connector B-05 at throttle position
sensor and harness connector D-135 at PCM for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 5.

AK201174

1

6 5 4 3 2

B-05(B)

CONNECTOR: B-05

HARNESS
CONNECTOR:
COMPONENT SIDE

AB

AK200947

91

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CONNECTOR: D-135

HARNESS CONNECTOR:
COMPONENT SIDE

AB

PCM

D-135(GR)