Mitsubishi Galant 9G. Manual - part 1168

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-972

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

CAUTION

If DTC P2135 has been set, TCL related DTC 
U1120 is also set. After P2135 has been diag-
nosed, don't forget to erase DTC U1120.

.

THROTTLE POSITION SENSOR (MAIN 
AND SUB) RANGE/PERFORMANCE 
PROBLEM CIRCUIT

• Refer to DTC P0122 − Throttle Position Sensor 

(Main) Circuit 

P.13B-162

.

• Refer to DTC P0222 − Throttle Position Sensor 

(Sub) Circuit 

P.13B-550

.

.

CIRCUIT OPERATION

• Refer to DTC P0122 − Throttle Position Sensor 

(Main) Circuit 

P.13B-162

.

• Refer to DTC P0222 − Throttle Position Sensor 

(Sub) Circuit 

P.13B-550

.

.

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)

• Mass airflow sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-973

DTC SET CONDITIONS <Range/Performance problem -relation between main and 
sub>
Logic Flow Chart

.

Check Conditions

• Ignition switch is "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

AK302391

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-974

DTC SET CONDITIONS <Range/Performance problem -relation between main and 
sub>
Logic Flow Chart

.

Check Conditions

• Ignition switch is "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.13B-6

.

.

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

• Throttle position sensor failed.

• Shorted throttle position sensor circuit or connec-

tor damage.

• PCM failed.

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 0.5sec

TPS (SUB) < =4.2V

MONITORING

CONDITIONS

AK302392

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-975

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check harness connector B-06 at throttle position 
sensor and harness connector B-22 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.

2 1

6 5 4 3

AK303044

HARNESS
CONNECTOR:
COMPONENT SIDE

B-06 (B)

CONNECTOR: B-06

AB

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR: 
COMPONENT SIDE

AIR CLEANER