Part 5
2ZR-FE ENGINE CONTROL: SFI SYSTEM: P1603, P1605; Engine Stall History; 2013 MY Corolla [07/2012 -]
P1605 - Rough Idling
54. CHECK INTAKE SYSTEM
(a) Check for air leakage in the intake system [vacuum hose disconnection, cracks, damaged gaskets, etc.] Intake System.
HINT
* If the accelerator pedal is released after racing the engine, the inspection is easier to perform because the vacuum inside the intake pipes increases and the air suction noise becomes louder.
* If Short FT and Long FT are largely different from the normal values when idling (the intake air volume is small) and almost the same as the normal values when racing the engine (the intake air volume is high), air leakage may be present.
OK:
There is no air leakage.
NG -- REPAIR OR REPLACE INTAKE SYSTEM
OK -- Continue to next step.
55. CHECK INTAKE SYSTEM
(a) Check the intake system.
* Inspect the brake booster assembly Initial Inspection and Diagnostic Overview.
* Inspect the mass air flow meter sub-assembly P0102.
* Check the PCV hose Components.
* Inspect the PCV valve Testing and Inspection.
* Inspect the purge VSV Testing and Inspection.
Result
B -- READ FREEZE FRAME DATA
A -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
56. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT LINEAR)
(a) Perform the Active Test, referring to DTC P0011 inspection procedure P0011.
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
* If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Removal
OK -- Continue to next step.
57. CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) - ECM)
(a) Check the harnesses and connectors, referring to DTC P0010 inspection procedure P0010.
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
58. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE VVT EXHAUST LINEAR)
(a) Perform the Active Test, referring to DTC P0014 inspection procedure P0014.
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* When the results of the inspection using the Active Test are normal but the valve operating noise is abnormal, check the valve for any signs of problems.
* If the camshaft timing oil control valve is stuck on, the valve overlap increases and combustion worsens due to the internal EGR which may cause rough idle or cause the engine to stall.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) Removal
OK -- Continue to next step.
59. CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT) - ECM)
(a) Check the harnesses and connectors, referring to DTC P0013 inspection procedure P0013.
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
60. READ FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
B -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- Continue to next step.
61. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
(a) Inspect the engine coolant temperature sensor Testing and Inspection.
NG -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
OK -- Continue to next step.
62. CHECK HARNESS AND CONNECTOR (ECM - ENGINE COOLANT TEMPERATURE SENSOR)
(a) Disconnect the ECM connector.
(b) Disconnect the engine coolant temperature sensor connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* Make sure there is not an excessive amount of force applied to the wire harness.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
63. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY (INTAKE AIR TEMPERATURE SENSOR)
(a) Inspect the mass air flow meter sub-assembly (intake air temperature sensor) Inspection.
HINT
If the intake air temperature sent to the ECM is higher than the standard due to the mass air flow meter sub-assembly (intake air temperature sensor) malfunctioning, the ignition timing may become delayed.
NG -- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Removal
OK -- Continue to next step.
64. READ VALUE USING TECHSTREAM (IGN ADVANCE AND KNOCK CORRECT LEARN VALUE)
(a) Connect the Techstream to the DLC3.
(b) Start the engine and warm it up until the engine coolant temperature stabilizes.
HINT
The A/C switch and all accessory switches should be off.
(c) Idle the engine.
(d) Using the Techstream, read the value of IGN Advance and Knock Correct Learn Value in the Data List.
Result
HINT
If the results of the checks performed in steps 56 to 64 were all normal and the sum of ISC Feedback Value and ISC Learning Value in the Data List is 120% of the normal value or more, check for carbon deposits in the throttle body assembly. If there are carbon deposits, clean them off to finish the troubleshooting procedure.
B -- END
A -- CHECK KNOCK SENSOR CIRCUIT P0327
65. CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
(a) Check the harness and connectors, referring to Fuel Injector Circuit inspection procedure Fuel Injector Circuit.
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* Make sure there is not an excessive amount of force applied to the wire harness.
* A rapid decrease in engine speed may have been caused by a malfunction in all or multiple cylinders. (There may be an electrical malfunction in the wiring shared by all the cylinders.)
NG -- REPAIR FUEL INJECTOR ASSEMBLY POWER SOURCE CIRCUIT Fuel Injector Circuit
OK -- Continue to next step.
66. CHECK IGNITION SYSTEM
(a) Perform ignition system On-vehicle Inspection Testing and Inspection.
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
67. CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
* *1: Check not only the ON/OFF state of the air conditioner but also the change in air conditioner load.
* *2: for Automatic transaxle models
* *3: for Manual transaxle models
* The normal value for the ISC learned value is engine displacement (liters) x 0.9.
* Even if the results are normal, the power steering system or A/C system may have been malfunctioning. If there are no problems with other parts, inspect the power steering system or A/C system.
B -- READ FREEZE FRAME DATA
C -- CHECK AIR CONDITIONING SYSTEM How to Proceed With Troubleshooting
D -- CHECK AIR CONDITIONING SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.
68. CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
* *3: If the Electrical Load Signal 1 (2) display changes from OFF to ON, or the "Electric Load Feedback Val" increases, it probably is a malfunction due to a change in electrical load. Check the generator and the continuity and connections between the generator and ECM.
* If the vehicle speed is 30 km/h (19 mph) or less and the difference between Engine Speed and SPD (NT) is 100 rpm or less, inspect the automatic transmission. (Depending on the rate of vehicle deceleration, the engine speed may have decreased due to the A/T lock-up release being late.)
* The normal value for the ISC learned value is engine displacement (liters) x 0.9.
* Even if the results are normal, the electrical load signal system and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the electrical load system and/or A/T system.
B -- CHECK AUTOMATIC TRANSMISSION SYSTEM How to Proceed With Troubleshooting
C -- CHECK GENERATOR CIRCUIT Problem Symptoms Table
A -- Continue to next step.
69. CHECK FREEZE FRAME DATA
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Freeze Frame Data.
Result
HINT
Even if the results are normal, the park/neutral position switch assembly and/or A/T system may have been malfunctioning. If there are no problems with other parts, inspect the park/neutral position switch assembly and/or A/T system.
B -- CHECK AUTOMATIC TRANSMISSION SYSTEM How to Proceed With Troubleshooting
C -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
A -- INSPECT PARK/NEUTRAL POSITION SWITCH Component Tests and General Diagnostics