Mitsubishi 380. Manual — part 541
MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MPI)
13A-256
STEP 1. Using diagnostic tool, check data list item AF:
Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).
CAUTION
To prevent damage to diagnostic tool, always turn the igni-
tion switch to the "LOCK" (OFF) position before connect-
ing or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Start the engine and run at idle.
(3) Set diagnostic tool to the data reading mode for item AF,
Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).
(4) Warm up the engine.
• Warming up the engine. When the engine is revved, the
output voltage should alternate between 0 and 0.6 to 1.0
volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunctions
.
NO : Replace the heated oxygen sensor (rear). Then go to
Step 2.
STEP 2. Test the EOBD drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− EOBD Drive Cycle −
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0159 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MPI)
13A-257
DTC P0160: Heated Oxygen Sensor Circuit No Activity (bank 2, sensor 2).
.
CIRCUIT OPERATION
• A voltage corresponding to the oxygen concen-
tration in the exhaust gas is sent to the
ENGINE-ECU (terminal No. 30) from the output
terminal (terminal No. 1) of the left bank heated
oxygen sensor (rear).
• Terminal No. 2 of the left bank heated oxygen
sensor (rear) is grounded with ENGINE-ECU (ter-
minal No. 29) .
• The ENGINE-ECUapplies an offset voltage of 0.5
volt to terminal No. 2 of the left bank heated oxy-
gen sensor (rear).
.
TECHNICAL DESCRIPTION
• The output signal of the heated left bank oxygen
sensor (front) is compensated by the output sig-
nal of the left bank heated oxygen sensor (rear).
• The ENGINE-ECU checks for the left bank
heated oxygen sensor (rear) output voltage.
.
DTC SET CONDITIONS
Check Conditions
• Battery voltage is between 10.7 and 16.1volts.
• Engine speed is above 20 r/min.
• Engine start achieved.
Judgment Criteria
• Signal check.
• MIL is activated after 2 Drive cycles.
• No limp home.
.
EOBD DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− EOBD Drive Cycle −
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are: )
• Left bank heated oxygen sensor (rear) failed.
• Open circuit in left bank heated oxygen sensor
(rear) output line.
• Open circuit in left bank heated oxygen sensor
(rear) sensor ground.
• Wiring harness or connector damage.
• Refer to component locations GROUP-
• Refer to configuration diagrams GROUP-
• Refer to circuit diagrams GROUP-
DIAGNOSIS
Required Special Tools:
• : Diagnostic Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
AK303079
CONNECTOR: B-24
AB
LEFT BANK
HEATED OXYGEN
SENSOR (REAR)
B-24 (GR)
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MPI)
13A-258
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using diagnostic tool, check data list item AF:
Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).
CAUTION
To prevent damage to diagnostic tool, always turn the igni-
tion switch to the "LOCK" (OFF) position before connect-
ing or disconnecting diagnostic tool .
(1) Connect diagnostic tool to the data link connector.
(2) Start the engine and run at idle.
(3) Ensure engine is at running temperature (80
° C or higher).
(4) Set diagnostic tool to the data reading mode for item AD,
Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).
• Warming up the engine. When the engine is revved, the
output voltage should alternate between 0 and 0.6 to 1.0
volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
− How to
Cope with Intermittent Malfunctions
.
NO : Then go to Step 2.
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS
MULTIPORT FUEL INJECTION (MPI)
13A-259
STEP 2. Measure the sensor output voltage at
ENGINE-ECU connector B-20 by using ENGINE-ECU
check harness special tool MB992044.
(1) Disconnect the all ENGINE-ECU connectors and connect
ENGINE-ECU check harness special tool MB992044
between the separated connectors.
(2) Start the engine and run at idle.
(3) Ensure engine is at running temperature (80
° C or higher).
(4) Measure the voltage between terminal No. 30 and ground.
• Warm engine. When the engine is revved, the output
voltage should alternate between 0 and 0.6-1.0 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage cycling within the specified
range?
YES : Go to Step 6.
NO : Then go to Step 3.
16DB400A
COVER
ENGINE
CONTROL
UNIT
AIR
CLEANER
03DB213A
B-20 HARNESS
CONNECTOR
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст