P1500

1GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1500: AC Inverter Malfunction
P1500 - AC Inverter Malfunction

DESCRIPTION

This vehicle is equipped with a voltage inverter, which supplies power to various electrical appliances. When the main switch of the voltage inverter is turned ON, the inverter relay turns ON, and the inverter then converts the 12 V Direct Current (DC) of the battery into an 115 V Alternating Current (AC). The voltage inverter can output a maximum of 400 W from an outlet.

When the AC 115 V is output, a load is applied to the engine. The ECM controls the engine idling speed according to the vehicle speed and engine load. A speed signal is input to the inverter and an idle-up signal is transmitted to the ECM.









MONITOR DESCRIPTION

While the engine is idling, the ECM performs idle-up according to the power supply of the inverter to stabilize the engine idling speed.

When the vehicle is stationary and the inverter input exceeds 8.3 A, the inverter sends an idle-up signal from the OUT terminal of the inverter to the ELS2 terminal of the ECM.

If the idle-up signal is input into the ECM for 10 seconds while the vehicle is running, the ECM interprets this as a malfunction in the inverter circuit and sets the DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON.

3. Turn the Techstream on.

4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

5. Turn the ignition switch off and wait for at least 30 seconds.

6. Turn the ignition switch to ON and turn the Techstream on.

7. Start the engine and warm it up until the engine coolant temperature reaches 70°C (158°F) or higher [A].

8. Drive the vehicle for 30 seconds or more [B].

CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.

9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [C].

10. 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.

11. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

12. Input the DTC: P1500.

13. Check the DTC judgment result.





HINT
* If the judgment result shows NORMAL, the system is normal.
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [B] and [C] again.

14. If no pending DTC is output, perform a universal trip and check for permanent DTCs DTC Check / Clear.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P1500)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(d) Read DTCs.

Result





HINT
If any DTCs other than P1500 are output, troubleshoot those DTCs first.

B -- GO TO DTC CHART SFI System
A -- Continue to next step.

2. INSPECT VOLTAGE INVERTER ASSEMBLY (SPD SIGNAL)





(a) Move the shift lever to neutral position.

(b) Jack up the vehicle.

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





HINT
The output voltage should fluctuate up and down similarly to the diagram on the left when the wheel is turned slowly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT ECM





(a) Disconnect the voltage inverter connector.

(b) Start the engine.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





(d) Reconnect the inverter connector.

NG -- CHECK HARNESS AND CONNECTOR (ECM - INVERTER, INVERTER - POWER SOURCE)

OK -- REPLACE VOLTAGE INVERTER ASSEMBLY Removal

4. CHECK HARNESS AND CONNECTOR (ECM - INVERTER, INVERTER - POWER SOURCE)





(a) Disconnect the voltage inverter connector.

(b) Disconnect the ECM connector.

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage (Check for Short in Idling Up Signal Circuit):





(e) Reconnect the inverter connector and the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal