- DTC judgment completed
- System normal
| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM100000001KHOW |
| Model Year Start: 2020 | Model: Camry HV | Prod Date Range: [09/2019 - ] |
| Title: A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P040318,P040319,P140018,P140019; Exhaust Gas Recirculation "A" Circuit Current Below Threshold; 2020 - 2024 MY Camry HV [09/2019 - ] | ||
|
DTC |
P040318 |
Exhaust Gas Recirculation "A" Circuit Current Below Threshold |
|
DTC |
P040319 |
Exhaust Gas Recirculation "A" Circuit Current Above Threshold |
|
DTC |
P140018 |
Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold |
|
DTC |
P140019 |
Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Above Threshold |
DESCRIPTION
Refer to DTC P040000.
Click here
![2020 - 2024 MY Camry HV [09/2019 - ]; A25A-FXS (ENGINE CONTROL): SFI SYSTEM: P040000-P04029B; Exhaust Gas Recirculation "A" Flow](/t3Portal/stylegraphics/info.gif)
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P040318 |
Exhaust Gas Recirculation "A" Circuit Current Below Threshold |
Open or short in EGR A circuit for 1 second or more (1 trip detection logic). |
|
Comes on |
DTC stored |
|
|
P040319 |
Exhaust Gas Recirculation "A" Circuit Current Above Threshold |
Short in EGR A circuit for 1 second or more (1 trip detection logic). |
|
Comes on |
DTC stored |
|
|
P140018 |
Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Below Threshold |
Open or short in EGR B circuit for 1 second or more (1 trip detection logic). |
|
Comes on |
DTC stored |
|
|
P140019 |
Exhaust Gas Recirculation "A" Control Circuit 2 Circuit Current Above Threshold |
Short in EGR B circuit for 1 second or more (1 trip detection logic). |
|
Comes on |
DTC stored |
|
MONITOR DESCRIPTION
These DTCs are stored if an open or short in the EGR valve assembly circuit is detected.
Example:
- If the EGA+, EGA-, EGB+ or EGB- operation signal is off, but the step motor output signal is on, the ECM determines that there is a short in the EGR valve assembly circuit, and stores a DTC P040319 or P140019.
- If the EGA+, EGA-, EGB+ or EGB- operation signal is on, and the step motor output signal is off, the ECM determines that there is an open or short in the EGR valve assembly circuit, and stores a DTC P040318 or P140018.
MONITOR STRATEGY
|
Related DTCs |
P0489: EGR A circuit range check (low voltage) P0489: EGR B circuit range check (low voltage) P0490: EGR A circuit range check (high current) P0490: EGR B circuit range check (high current) |
|
Required Sensors/Components (Main) |
EGR valve assembly |
|
Required Sensors/Components (Related) |
- |
|
Frequency of Operation |
Continuous |
|
Duration |
1 second |
|
MIL Operation |
Immediate |
|
Sequence of Operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Monitor runs whenever the following DTCs are not stored |
None |
|
Both of the following conditions are met |
- |
|
Auxiliary battery voltage |
10.5 V or higher |
|
Time after power switch off to on (IG) |
0.5 seconds or more |
P0489: EGR A Circuit Range Check (Low Voltage)
|
Exhaust gas recirculation control circuit motor phase A high current fail (P0490) |
Not detected |
P0489: EGR B Circuit Range Check (Low Voltage)
|
Exhaust gas recirculation control circuit motor phase B high current fail (P0490) |
Not detected |
P0490: EGR A Circuit Range Check (High Current)
|
Exhaust gas recirculation control circuit motor phase A low voltage fail (P0489) |
Not detected |
P0490: EGR B Circuit Range Check (High Current)
|
Exhaust gas recirculation control circuit motor phase B low voltage fail (P0489) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0489: EGR A Circuit Range Check (Low Voltage)
|
Either of the following conditions is met |
- |
|
Motor phase A positive terminal voltage detected by motor driver IC |
0.2 V or less |
|
Motor phase A negative terminal voltage detected by motor driver IC |
0.2 V or less |
P0489: EGR B Circuit Range Check (Low Voltage)
|
Either of the following conditions is met |
- |
|
Motor phase B positive terminal voltage detected by motor driver IC |
0.2 V or less |
|
Motor phase B negative terminal voltage detected by motor driver IC |
0.2 V or less |
P0490: EGR A Circuit Range Check (High Current)
|
One of the following conditions is met |
- |
|
Motor phase A positive terminal current detected by motor driver IC |
1.2 A or more |
|
Motor driver MOSFET temperature for motor phase A positive terminal detected by motor driver IC |
150°C (302°F) or higher |
|
Motor phase A negative terminal current detected by motor driver IC |
1.2 A or more |
|
Motor driver MOSFET temperature for motor phase A negative terminal detected by motor driver IC |
150°C (302°F) or higher |
P0490: EGR B Circuit Range Check (High Current)
|
One of the following conditions is met |
- |
|
Motor phase B positive terminal current detected by motor driver IC |
1.2 A or more |
|
Motor driver MOSFET temperature for motor phase B positive terminal detected by motor driver IC |
150°C (302°F) or higher |
|
Motor phase B negative terminal current detected by motor driver IC |
1.2 A or more |
|
Motor driver MOSFET temperature for motor phase B negative terminal detected by motor driver IC |
150°C (302°F) or higher |
CONFIRMATION DRIVING PATTERN
HINT:
-
After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
-
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the power switch off and wait for at least 30 seconds.
- Turn the power switch on (IG) [A].
- Turn the Techstream on.
-
Put the engine in Inspection Mode (Maintenance Mode).
Click here
- Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
-
With the engine running, drive the vehicle at 20 km/h (12 mph) or more for 10 minutes or more [C].
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
If the engine stops, further depress the accelerator pedal to restart the engine.
- Enter the following menus: Powertrain / Engine / Trouble Codes [D].
-
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- Enter the following menus: Powertrain / Engine / Utility / All Readiness.
- Input the DTC: P040318, P040319, P140018 or P140019.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
HINT:
- If the judgment result is NORMAL, the system is normal.
- If the judgment result is ABNORMAL, the system is malfunctioning.
-
[A] to [D]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.
for NICKEL METAL HYDRIDE BATTERY:
Click here
for LITHIUM-ION BATTERY:
Click here
(Select Powertrain in Health Check and then check the time stamp data.)
Click here
-
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
for NICKEL METAL HYDRIDE BATTERY:
Click here
for LITHIUM-ION BATTERY:
Click here
HINT:
Read Freeze Frame Data using the Techstream. The ECM records vehicle and driving condition information as Freeze Frame Data the moment a DTC is stored. When troubleshooting, Freeze Frame Data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE EGR STEP POSITION) |
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
HINT:
The A/C switch and all accessory switches should be off.
(e) Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure, Coolant Temperature and Engine Independent.
Powertrain > Engine > Active Test
|
Active Test Display |
|---|
|
Control the EGR Step Position |
|
Data List Display |
|---|
|
Intake Manifold Absolute Pressure |
|
Coolant Temperature |
|
Engine Independent |
(f) Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.
NOTICE:
- Make sure that the value of Data List item Engine Independent is "Operate" while performing the Active Test.
- Do not leave the EGR valve open for 10 seconds or more during the Active Test.
- Be sure to return the EGR valve to step 0 when the Active Test is completed.
- Do not open the EGR valve 30 steps or more during the Active Test.
OK:
The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".
Standard:
|
- |
Control the EGR Step Position (Active Test) |
|
|---|---|---|
|
0 Steps |
0 to 30 Steps |
|
|
Intake Manifold Absolute Pressure (Data List) |
(EGR valve is fully closed) |
Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed |
HINT:
- If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Perform the Active Test after charge control is complete ("Operate" is displayed).
- While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be malfunctioning.
- Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.
| OK |
|
|
|
2. |
INSPECT EGR VALVE ASSEMBLY |
(a) Inspect the EGR valve assembly.
Click here
HINT:
Perform "Inspection After Repair" after replacing the EGR valve assembly.
Click here
| NG |
|
REPLACE EGR VALVE ASSEMBLY
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (EGR VALVE ASSEMBLY - ECM) |
(a) Disconnect the EGR valve assembly connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C90-1 (EGA+) - C100-3 (EGA+) |
Always |
Below 1 Ω |
|
C90-2 (EGA-) - C100-4 (EGA-) |
Always |
Below 1 Ω |
|
C90-4 (EGB+) - C100-6 (EGB+) |
Always |
Below 1 Ω |
|
C90-3 (EGB-) - C100-5 (EGB-) |
Always |
Below 1 Ω |
|
C90-1 (EGA+) or C100-3 (EGA+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C90-2 (EGA-) or C100-4 (EGA-) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C90-4 (EGB+) or C100-6 (EGB+) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C90-3 (EGB-) or C100-5 (EGB-) - Body ground and other terminals |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|