[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - DIAGNOSIS FUNCTIONPRINT PAGE / INDEX / PRIOR / NEXT
DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
   
If an abnormality occurs in any of the following items related to the Multipoint Fuel Injection (MPI) system, the engine warning lamp will illuminate.
If the lamp remains illuminated or if the lamp illuminates while the engine is running, check the diagnosis code output.
ENGINE WARNING LAMP INSPECTION ITEMS
Code No.
 Diagnosis item
-
 Engine-A/T-ECU
P0100
 Air flow sensor system
P0105
 Barometric pressure sensor system <Vehicles except for Hong kong>
P0105
 Manifold absolute pressure sensor system <Vehicles for Hong kong>
P0110
 Intake air temperature sensor system
P0115
 Engine coolant temperature sensor system
P0122*
 Throttle position sensor (main) circuit low input
P0123*
 Throttle position sensor (main) circuit high input
P0125*
 Feedback system monitor <Vehicles for Hong kong>
P0130
 Cylinder 1, 4 oxygen sensor (front) system <Vehicles for Hong kong>
P0135
 Cylinder 1, 4 oxygen sensor (front) heater system <Vehicles for Hong kong>
P0136
 Cylinder 1, 4 oxygen sensor (rear) system <Vehicles for Hong kong>
P0141
 Cylinder 1, 4 oxygen sensor (rear) heater system <Vehicles for Hong kong>
P0150
 Cylinder 2, 3 oxygen sensor (front) system <Vehicles for Hong kong>
P0155
 Cylinder 2, 3 oxygen sensor (front) heater system <Vehicles for Hong kong>
P0156
 Cylinder 2, 3 oxygen sensor (rear) system <Vehicles for Hong kong>
P0161
 Cylinder 2, 3 oxygen sensor (rear) heater system <Vehicles for Hong kong>
P0170
 Abnormal fuel system (cylinder 1, 4) <Vehicles for Hong kong>
P0173
 Abnormal fuel system (cylinder 2, 3) <Vehicles for Hong kong>
P0201
 No. 1 injector system
P0202
 No. 2 injector system
P0203
 No. 3 injector system
P0204
 No. 4 injector system
P0222*
 Throttle position sensor (sub) circuit low input
P0223*
 Throttle position sensor (sub) circuit high input
P0300*
 Ignition coil (power transistor) system <Vehicles except for Hong kong>
P0300*
 Random/multiple cylinder misfire detected <Vehicles for Hong kong>
P0301*
 No. 1 cylinder misfire detected <Vehicles for Hong kong>
P0302*
 No. 2 cylinder misfire detected <Vehicles for Hong kong>
P0303*
 No. 3 cylinder misfire detected <Vehicles for Hong kong>
P0304*
 No. 4 cylinder misfire detected <Vehicles for Hong kong>
P0325
 Detonation sensor system
P0335
 Crank angle sensor system
P0340
 Camshaft position sensor system
P0403
 Exhaust gas recirculation control system <Vehicles for Hong kong>
P0421
 Warm up catalyst malfunction (cylinder 1, 4) <Vehicles for Hong kong>
P0431
 Warm up catalyst malfunction (cylinder 2, 3) <Vehicles for Hong kong>
P0443
 Purge control solenoid valve system <Vehicles for Hong kong>
P0500
 Vehicle speed signal system
P0505
 Idle speed control (ISC) system <Vehicles for Hong kong>
P0513
 Immobilizer malfunction <Vehicles for South africa, GCC and Australia>
P0551*
 Power steering fluid pressure switch system <Vehicles for Hong kong>
P0554
 Power steering fluid pressure switch circuit intermittent <Vehicles for Hong kong>
P0606*
 Engine-A/T-ECU main processor malfunction <Vehicles except for Hong kong>
P0622
 Alternator FR terminal system
P0638*
 Throttle valve control servo circuit range/performance problem
P0642*
 Throttle position sensor power supply
P0657*
 Throttle valve control servo relay circuit malfunction
P1021
 Oil control valve system
P1602*
 Communication malfunction (between engine-A/T-ECU main processor and system LSI)
P1603*
 Battery backup circuit malfunction <Vehicles for Hong kong>
P2100*
 Throttle valve control servo circuit (open)
P2101*
 Throttle valve control servo magneto malfunction
P2102*
 Throttle valve control servo circuit (shorted low)
P2103*
 Throttle valve control servo circuit (shorted high)
P2121*
 Accelerator pedal position sensor (main) circuit range/performance problem <Vehicles except for South africa, Australia>
P2122*
 Accelerator pedal position sensor (main) circuit low input
P2123*
 Accelerator pedal position sensor (main) circuit high input
P2126*
 Accelerator pedal position sensor (sub) circuit range/performance problem <Vehicles except for South africa, Australia>
P2127*
 Accelerator pedal position sensor (sub) circuit low input
P2128*
 Accelerator pedal position sensor (sub) circuit high input
P2135*
 Throttle position sensor (main and sub) range/performance problem
P2138*
 Accelerator pedal position sensor (main and sub) range/performance problem
P2173*
 Abnormal intake air amount

NOTE: 
  • If the engine warning lamp illuminates because of a malfunction of the engine-A/T-ECU, communication between MUT-II/III and the engine-A/T-ECU is impossible. In this case, the diagnosis code cannot be read.
  • After the engine-A/T-ECU has detected a malfunction, the engine warning lamp illuminates when the engine is next turned on and the same malfunction is re-detected.However, for items marked with a "*" in the diagnosis code number column, the engine warning lamp illuminates only on the first detection of the malfunction.
  • After the engine warning lamp illuminates, it will be switched off under the following conditions.
    • When the engine-A/T-ECU monitored the power train malfunction three times* met set condition requirements, it detected no malfunction.
      *: In this case, "one time" indicates from engine start to stop.
    • For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature, etc.) are similar to those when the malfunction was first recorded.
  • 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.
METHOD OF READING AND ERASING DIAGNOSIS CODES
Refer to , GROUP 00 - How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS USING DIAGNOSIS 2 CODES
  1. Switch the diagnosis mode of the engine control unit to DIAGNOSIS 2 mode using the MUT-II/III.
  1. Carry out a road test.
  1. Take a reading of the diagnosis code and repair the problem location.
  1. Turn the ignition switch to OFF and then back to ON again.
    2. NOTE: By turning the ignition switch to OFF, the engine-A/T-ECU will switch the diagnosis mode from DIAGNOSIS 2 mode to DIAGNOSIS 1 mode.
  1. Erase the diagnosis codes.
INSPECTION USING MUT-II/III DATA LIST AND ACTUATOR TESTING
  1. Carry out inspection by means of the data list and the actuator test function, if there is an abnormality, check and repair the chassis harness and components.
  1. After repairing, re-check using the MUT-II/III and check that the abnormal input and output have returned to normal as a result of the repairs.
  1. Erase the diagnosis code memory.
  1. Remove the MUT-II/III, and then start the engine again and carry out a road test to confirm that the problem has disappeared.
FREEZE FRAME DATA
When the engine-A/T-ECU detects a malfunction and stores a diagnosis code, it also stores a current status of the engine. This function is called "Freeze frame data". By analyzing this "Freeze frame" data with the MUT-II/III, an effective troubleshooting can be performed.
The display items of freeze frame data are shown below.
DISPLAY ITEM LIST
Item No.
 Data
 Unit
12
 Air flow sensor
 gm/s
13
 Intake air temperature sensor
 °C
21
 Engine coolant temperature sensor
 °C
22
 Crank angle sensor
 r/min
24
 Vehicle speed
 km/h
44
 Ignition advance
 deg
81
 Long-term fuel compensation (cylinder 1, 4)
 %
82
 Short-term fuel compensation (cylinder 1, 4)
 %
83
 Long-term fuel compensation (cylinder 2, 3)
 %
84
 Short-term fuel compensation (cylinder 2, 3)
 %
88
 Fuel control condition (cylinder 1, 4)
 Open loop
 OL
Closed loop
 CL
Open loop owing to drive condition
 OL-DRV.
Open loop owing to system malfunction
 OL-SYS.
Closed loop based on one oxygen sensor
 CL- H02S
89
 Fuel control condition (cylinder 2, 3)
 Open loop
 OL
Closed loop
 CL
Open loop owing to drive condition
 OL-DRV.
Open loop owing to system malfunction
 OL-SYS.
Closed loop based on one oxygen sensor
 CL- H02S
87
 Calculation load value
 %
8A
 Throttle position sensor (main)
 %
-
 Diagnosis code during data recording
 -
NOTE: If malfunctions have been detected in multiple systems, store one malfunction only, which has been detected first.
DRIVE CYCLE
The following five drive cycle patterns are performed on the diagnosis codes monitored during the vehicle driving. The vehicle driving requires the patterns to identify the fault. In other words, doing such a drive allows to regenerate any kind of trouble which involves illuminating the engine warming lamp (check engine lamp) and to verify the repair procedure has eliminated the trouble [the engine warming lamp (check engine lamp) is no longer illuminated].
 CAUTION
 Two technicians should always be in the vehicle when carrying out a test drive.
NOTE: Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diagnosis code if it has been output.
DRIVE CYCLE PATTERN LIST
Procedure
 Monitor item
 Diagnosis code
1
 Catalytic converter monitor <Vehicles for Hong kong>
 P0421, P0431
2
 Oxygen sensor (front) monitor <Vehicles for Hong kong>
 P0130, P0150
3
 Other monitor
 P0135, P0136, P0141, P0155, P0156, P0161 <Vehicles for Hong kong>
P0201, P0202, P0203, P0300
P0301, P0302, P0303, P0304 <Vehicles for Hong kong>
P0325, P0500
P0551 <Vehicles for Hong kong>

Procedure 1
Catalytic converter monitor <Vehicles for Hong kong>
Diagnosis code No.
 P0421, P0431
Drive cycle pattern
 One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed while traveling with the following drive cycle pattern. It will take 16 minutes or more.

   
Inspection condition
  • Atmospheric temperature: -10°C or more
Test procedure
  1. Engine: start
  1. Accelerate until the vehicle speed is 90 km/h or more.
  1. Travel for 6 minutes or more while keeping the vehicle speed at 90 km/h or more.
  1. Decelerate until the vehicle speed is within 80 km/h or less.
  1. While traveling at 55 - 80 km/h for 10 minutes or more, fully close the throttle at least once in 2 minutes and decelerate for 10 seconds or more.
    • Do not repeat deceleration too often.
    • Vehicle speed may go below 55 km/h after the deceleration.
    • Stopping and braking are permitted. (If stopped or drive at 55 km/h or less for more than 5 minutes the monitoring may be stopped. In this case please restart monitoring from the beginning.)
  1. After completing the above deceleration, bring the vehicle speed back to 55 - 80 km/h and keep it in the range until starting the deceleration again.
    • Repeat the above deceleration at least 5 times.
  1. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

Procedure 2
Oxygen sensor (front) monitor <Vehicles for Hong kong>
Diagnosis code No.
 P0130, P0150
Drive cycle pattern
 One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed while traveling with the following drive cycle pattern. It will take 16 minutes or more.

   
Inspection conditions
  • Engine coolant temperature: After engine warm up
  • Atmospheric temperature: -10°C or more
Test procedure
  1. Engine: start
  1. Accelerate until the vehicle speed is 55 - 80 km/h.
  1. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 55 - 80km/h and travel for 16 minutes or more.
    • Stopping and braking during this operation are permitted.
  1. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

Procedure 3
Other monitor
Diagnosis code No.
 P0135, P0136, P0141, P0155, P0161 <Vehicles for Hong kong>
P0201, P0202, P0203, P0204, P0300
P0300 <Vehicles for Hong kong>
P0301 - P0304 <Vehicles for Hong kong>
P0325, P0500
P0551 <Vehicles for Hong kong>
Drive cycle pattern
 One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed while traveling with the following drive cycle pattern. It will take 21 minutes or more.

   
Inspection conditions
  • Engine coolant temperature: After engine warm up
  • Atmospheric temperature: -10°C or more
Test procedure
  1. Engine: start
  1. Accelerate until the vehicle speed is 55 km/h.
  1. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 55 km/h and travel for 16 minutes or more.
  1. Return the vehicle to the shop.
  1. After stopping the vehicle, continue idling for 5 minutes, and then turn the ignition switch to "LOCK" (OFF) position.

READINESS TEST STATUS <Vehicles for Hong kong>
The engine-A/T-ECU monitors the following main diagnosis items, judges if these items are in good condition or not, and the stores its history. this history can be read out by using MUT-II/III. (If the ECU has judged a item before, the MUT-II/III displays "Complete").
In addition, if diagnosis codes are erased or the battery cable is disconnected, this history will also be erased (the memory will be reset).
  • Catalyst: P0421, P0431
  • Oxygen sensor: P0130, P0136, P0150, P0156
  • Oxygen sensor heater: P0135, P0141, P0155, P0161
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by means of the pre-set control logic to maintain safe conditions for driving.
Malfunctioning item
 Control contents during malfunction
Air flow sensor
 Uses the throttle position sensor signal and engine speed signal (crankshaft position sensor signal) for basic injector drive time and basic ignition timing from the pre-set mapping.
Intake air temperature sensor
 Controls as if the intake air temperature is 25°C.
Barometric pressure sensor
 Controls as if the barometric pressure is 101 kPa.
Throttle position sensor (main)
  • Controls the throttle valve position through the use of the throttle position sensor (sub) signal.
  • Renders the amount of accelerator pedal travel as being approximately one-half the normal opening angle.
  • Prohibits the operation of the engine speed feedback control.
  • Cuts off fuel when the engine speed exceeds 3,000 r/min.
  • Suppresses the engine output by stopping the electronically controlled throttle valve system if the throttle position sensor (sub) is also malfunctioning.
Throttle position sensor (sub)
  • Controls the throttle valve position through the use of the throttle position sensor (main) signal.
  • Renders the amount of accelerator pedal travel as being approximately one-half the normal opening angle.
  • Cuts off fuel when the engine speed exceeds 3,000 r/min.
  • Suppresses the engine output by stopping the electronically controlled throttle valve system if the throttle position sensor (main) is also malfunctioning.
Accelerator pedal position sensor (main)
  • Detects the amount of the accelerator pedal travel through the use of the accelerator pedal position sensor (sub) signal, but rendering it only as being approximately one-half the normal opening angle.
  • Cuts off fuel when the engine speed exceeds 3,000 r/min.
  • Suppresses the engine output by stopping the electronically controlled throttle valve system if the accelerator pedal position sensor (sub) is also malfunctioning.
Accelerator pedal position sensor (sub)
  • Detects the amount of the accelerator pedal travel through the use of the accelerator pedal position sensor (main) signal, but rendering it only as being approximately one-half the normal opening angle.
  • Cuts off fuel when the engine speed exceeds 3,000 r/min.
  • Suppresses the engine output by stopping the electronically controlled throttle valve system if the accelerator pedal position sensor (main) is also malfunctioning.
Engine coolant temperature sensor
 Controls as if the engine coolant temperature is 80°C. (This control will be continued until the ignition switch is turned to the "LOCK" (OFF) position even though the sensor signal returns to normal.)
Camshaft position sensor
 Injects fuel into the cylinders in the order 1-3-4-2 with irregular timing. (After the ignition switch is turned to the "ON" position, the No. 1 cylinder top dead center is not detected at all.)
Oxygen sensor <front>
 Air/fuel ratio closed loop control is not performed.
Oxygen sensor <rear>
 Performs the closed loop control of the air/fuel ratio by using only the signal of the oxygen sensor (front) installed under the front side of the catalytic converter.
Detonation sensor
 Switches the ignition timing from ignition timing for high octane to ignition timing for standard octane fuel.
Ignition coil (incorporating power transistor)
 Cuts off the fuel supply to cylinders with an abnormal ignition.
Alternator FR terminal
 Does not control the output of the alternator according to an electrical load. (works as a normal alternator)
Misfiring
 If the detected misfiring causes damage to the catalyst, the misfiring cylinder will be shut down.
Throttle valve position feedback
  • Suppresses the engine output by stopping the electronically controlled throttle valve system.
  • Prohibits the operation of the engine speed feedback control.
Throttle valve control servo
  • Suppresses the engine output by stopping the electronically controlled throttle valve system.
  • Prohibits the operation of the engine speed feedback control.
Engine-A/T-ECU main processor
  • Suppresses the engine output by stopping the electronically controlled throttle valve system.
  • Prohibits the operation of the engine speed feedback control.
Communication between powertrain control module main processor and system LSI
  • Renders the amount of accelerator pedal travel as being approximately one-half the normal opening angle.
  • Prohibits the operation of the engine speed feedback control.
  • Cuts off fuel when the engine speed exceeds 3,000 r/min.
Intake air monitor
  • Suppresses the engine output by stopping the electronically controlled throttle valve system.
  • Prohibits the operation of engine speed feedback.
Oil control valve
  • Do not switch to high-speed cam.
  • Cut off fuel when the engine speed exceeds 5,000 r/min.

[13C] MULTIPORT FUEL INJECTION (MPI) <4G69> - - TROUBLESHOOTING - DIAGNOSIS FUNCTIONPRINT PAGE / INDEX / PRIOR / NEXT
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