NR Series ENGINE CONTROL SFI SYSTEM P023A13 Charge Air Cooler Coolant Pump Control Circuit Open
DESCRIPTION
Refer to DTC P023A12.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P023A13 | Charge Air Cooler Coolant Pump Control Circuit Open | Electric water pump assembly speed is less than 10 rpm (1 trip detection logic). | ·
Open or short in electric water pump assembly circuit ·
Electric water pump assembly ·
EFI-MAIN NO. 2 relay ·
ECM |
Does not come on | DTC stored | SAE Code: P023A |
| DTC No. | Data List |
|---|---|
| P023A13 | ·
Intercooler Water Pump Speed ·
Intercooler Water Pump |
MONITOR DESCRIPTION
If the electric water pump assembly operates at less than 10 rpm, the ECM determines there is a malfunction and stores this DTC.
CONFIRMATION DRIVING PATTERN
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
Turn the GTS on.
Accelerate to 50 km/h (31 mph) or more with the accelerator pedal fully depressed [B].
- CAUTION:
-
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
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: P023A13.
Check the DTC judgment result.
| GTS Display | Description |
|---|---|
| NORMAL | ·
DTC judgment completed ·
System 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 has a malfunction.
·If the judgment result is INCOMPLETE, perform steps [B] through [C] again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
-
Inspect the fuses for circuits related to this system before performing the following procedure.
- HINT:
-
Read Freeze Frame Data using the GTS. 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
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Active Test / Control the Intercooler Water Pump.
- Powertrain > Engine > Active Test
-
Tester Display Control the Intercooler Water Pump - 50004 372 9
Perform the Active Test. Check that the electric water pump assembly is operating (vibrating).
- OK:
The electric water pump assembly is operating (vibrating).
- HINT:
-
Use a sound scope if the operation is difficult to check.
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Electric Water Pump Assembly) |
Disconnect the electric water pump assembly connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A38-2 (NWP) - Body ground Ignition switch ON 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Disconnect the electric water pump assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A38-2 (NWP) - A46-11 (IWPI) Always Below 1 Ω A38-2 (NWP) or A46-11 (IWPI) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
Disconnect the electric water pump assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition A38-1 (PGND) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Inspect the EFI-MAIN NO. 2 relay.
- Result:
Proceed to OK NG
OK
NG
| *a | Front view of wire harness connector
(to Electric Water Pump Assembly) |
Disconnect the electric water pump assembly connector.
Turn the ignition switch to ON.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition A38-4 (+B) - Body ground Ignition switch ON 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
| *1 | No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly |
| *2 | EFI-MAIN NO. 2 Relay |
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Condition Specified Condition 5 (EFI-MAIN NO. 2 relay) - Body ground Always 11 to 14 V
- Result:
Proceed to OK NG
OK
NG
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 2 (EFI-MAIN NO. 2 relay) - Body ground Always Below 1 Ω
- Result:
Proceed to OK NG
OK
NG
Remove the EFI-MAIN NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Disconnect the electric water pump assembly connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 3 (EFI-MAIN NO. 2 relay) - A38-4 (+B) Always Below 1 Ω 3 (EFI-MAIN NO. 2 relay) or A38-4 (+B) - Body ground and other terminals Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG