Part 2
2ZR-FE ENGINE CONTROL: SFI SYSTEM: P1604; Startability Malfunction; 2013 MY Corolla [07/2012 -]
P1604 - Startability Malfunction
3. CHECK MALFUNCTION CONDITION
(a) Confirm the problem symptoms.
Result:
B -- CHECK MALFUNCTION CONDITION
A -- Continue to next step.
4. 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
When DTC P1604 is stored, either "Engine Start Hesitation"*1 or "Low Rev for Eng Start"*2 in the Freeze Frame Data will be ON. If "Low Rev for Eng Start" is ON, proceed to E.
*1: This value turns ON when the engine speed does not reach a certain value for a certain period of time when starting the engine.
*2: This value turns ON when the engine stalls immediately after starting the engine. If "Low Rev for Eng Start" is ON, as there is a possibility that the low engine speed or engine stall was caused by the user, confirm the following freeze frame data items.
* Immobiliser Fuel Cut
* Engine Speed (Starter off)
B -- READ FREEZE FRAME DATA
C -- READ FREEZE FRAME DATA
D -- READ FREEZE FRAME DATA
E -- INSPECT MASS AIR FLOW METER
A -- CHARGE OR REPLACE BATTERY
5. 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: The 5 sets of freeze frame data show approximately the same battery voltage.
* *2: The 5 sets of freeze frame data show different battery voltages.
* *3: If the voltage fluctuates, it can be determined that cranking is being performed normally. When the engine speed is 0 rpm, the crankshaft position sensor system and/or the ECM may be malfunctioning.
* *4: There may be excess engine friction. Make sure that the crankshaft rotates smoothly when turning it by hand. Excess engine friction may have occurred temporarily. Remove the cylinder head cover and oil pan, and check for foreign matter such as iron fragments. If there is a malfunction or signs of a malfunction present, perform a detailed inspection by disassembling all the parts.
B -- CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
C -- CHECK AND REPAIR ENGINE OR BATTERY
A -- CHECK CRANKING HOLDING FUNCTION CIRCUIT Cranking Holding Function Circuit
6. CHECK CRANKSHAFT POSITION SENSOR INSTALLATION
(a) Check the tightening and installation condition of the crankshaft position sensor bolt.
(b) Check the connection of the crankshaft position sensor connector.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Installation
OK -- Continue to next step.
7. CHECK CRANKSHAFT POSITION SENSOR
(a) Disconnect the crankshaft position sensor connector.
(b) Check for oil on the connector terminals.
OK:
No oil on the terminals.
(c) Reconnect the crankshaft position sensor connector.
NG -- REPLACE CRANKSHAFT POSITION SENSOR Removal
OK -- Continue to next step.
8. CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)
(a) Disconnect the crankshaft position sensor connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Standard Resistance (Check for Short):
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.
(d) Reconnect the ECM connector.
(e) Reconnect the crankshaft position sensor connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
9. CHECK CRANKSHAFT POSITION SENSOR
(a) Replace the crankshaft position sensor Removal.
(b) Check the engine start operation.
OK:
Malfunction has been repaired successfully.
NG -- REPLACE ECM Removal
OK -- END (CRANKSHAFT POSITION SENSOR WAS DEFECTIVE)
10. 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 not elapsed after stopping the engine.
* *2: A long time had elapsed after stopping the engine.
B -- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)
C -- CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
A -- REPLACE ENGINE COOLANT TEMPERATURE SENSOR Removal
11. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)
(a) Connect the Techstream to the DLC3.
(b) Disconnect the fuel pump connector.
(c) Turn the ignition switch to ON.
(d) Turn the Techstream on.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
(f) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.
(g) Reconnect the fuel pump connector.
NG -- CHECK FUEL PUMP CONTROL CIRCUIT Fuel Pump Control Circuit
OK -- Continue to next step.
12. CHECK FUEL INJECTOR ASSEMBLY (POWER SOURCE VOLTAGE)
(a) Disconnect the fuel injector connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
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.
(d) Reconnect the fuel injector connector.
NG -- CHECK FUEL INJECTOR CIRCUIT Fuel Injector Circuit
OK -- Continue to next step.
13. PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP/SPEED)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Fuel Pump/Speed.
(e) When performing the Active Test, check for fuel leakage from the fuel pipes.
Result:
HINT
* Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.
* When performing the Active Test, if there is no operating noise from the fuel pump, the fuel pump system may be malfunctioning.
* Check if the vehicle ran out of fuel, as engine starting trouble due to running out of fuel is also detected.
B -- CHECK FUEL SYSTEM
A -- REPAIR OR REPLACE HARNESS OR CONNECTOR
14. CHECK FUEL SYSTEM
(a) Check for foreign matter such as iron particles around the fuel pump (fuel pump, fuel pump filter, and inside the fuel tank), and for signs that the fuel pump was stuck.
Result:
B -- PERFORM SIMULATION TEST
A -- REPAIR OR REPLACE FUEL SYSTEM