Part 2
2ZR-FE ENGINE CONTROL: SFI SYSTEM: P1603, P1605; Engine Stall History; 2013 MY Corolla [07/2012 -]
P1605 - Rough Idling
5. 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.
6. CHECK PURGE VSV
(a) Disconnect the purge hose (on the canister side) of the purge VSV.
(b) Start the engine.
(c) Idle the engine.
(d) Disconnect the connector of the purge VSV.
(e) Check if air flows through the purge VSV.
OK:
Air does not flow.
HINT
When this inspection is performed, the MIL may illuminate. After finishing the inspection, check and clear DTCs Reading and Clearing Diagnostic Trouble Codes.
NG -- REPLACE PURGE VSV Removal
OK -- Continue to next step.
7. 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 IGNITION SYSTEM
A -- Continue to next step.
8. READ VALUE USING TECHSTREAM (SHORT FT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) 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.
(d) Idle the engine.
(e) Using the Techstream, read the value of Short FT #1 in the Data List while depressing the brake pedal.
Standard:
Short FT #1 changes by +10% or less.
HINT
When air leakage from the brake booster is present, the feedback compensation increases because the air fuel ratio becomes lean.
NG -- INSPECT BRAKE BOOSTER ASSEMBLY Initial Inspection and Diagnostic Overview
OK -- Continue to next step.
9. PERFORM DRIVE TEST
(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 Short FT #1 and Long FT #1 in the Data List.
Standard:
NG -- INSPECT BRAKE BOOSTER ASSEMBLY Initial Inspection and Diagnostic Overview
OK -- Continue to next step.
10. 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.
11. 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
HINT
* *1: If the mass air flow meter sub-assembly is malfunctioning and incorrectly measures the intake air volume to be less than the actual volume, the freeze frame data will show a low engine load value.
* *2: If the air fuel ratio sensor is malfunctioning and constantly outputs a value indicating the air fuel ratio is lean, the actual air fuel ratio will become rich and the engine may stall.
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)
A -- Continue to next step.
12. CHECK MASS AIR FLOW METER SUB-ASSEMBLY
(a) Remove the mass air flow meter sub-assembly.
(b) Check for foreign matter in the air flow passage of the mass air flow meter sub-assembly.
Result
B -- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Removal
A -- Continue to next step.
13. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)
(a) Check the harnesses and connectors, referring to DTC P0102 inspection procedure P0102.
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.
14. PERFORM DRIVE TEST
(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 Calculate Load in the Data List.
Standard:
Result
B -- READ FREEZE FRAME DATA
A -- REPLACE MASS AIR FLOW METER SUB-ASSEMBLY Removal
15. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)
(a) Connect the Techstream to the DLC3.
(b) Start the engine, turn off all accessory switches and warm up the engine until the engine coolant temperature stabilizes.
(c) Idle the engine.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / AFS Voltage B1S1.
(f) Read the output voltage from the air fuel ratio sensor when increasing and decreasing the fuel injection volume.
Standard:
Result
HINT
The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
16. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR FUEL RATIO SENSOR)
(a) Check the harnesses and connectors, referring to DTC P0031 inspection procedure P0031.
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 AIR FUEL RATIO SENSOR POWER SOURCE CIRCUIT P0031
OK -- Continue to next step.
17. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)
(a) Check the harnesses and connectors, referring to DTC P2237 inspection procedure P2237.
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.
18. 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
HINT
* *1: A long time had elapsed after stopping the engine.
* *2: A long time had not elapsed after stopping the engine.
B -- READ FREEZE FRAME DATA
A -- Continue to next step.
19. 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
HINT
This step is not directly related to engine stall.
B -- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
C -- READ FREEZE FRAME DATA
A -- Continue to next step.