P0052

P0052 HO2S1 HEATER

Description

System Description:

Operation:

CONSULT-II Reference Value In Data Monitor Mode:

ECM Terminal And Reference Value:

On Board Diagnosis Logic
Malfunction is detected when the current amperage in the heated oxygen sensor 1 heater circuit is out of the normal range.
[An excessively low (P0031) (B1)/(P0051) (B2) or high (P0032) (B1)/(P0052) (B2) voltage signal is sent to ECM through the heated oxygen sensor 1 heater.]

POSSIBLE CAUSE
- Harness or connectors
[The heated oxygen sensor 1 heater circuit is open or shorted.]

- Heated oxygen sensor 1 heater

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5 V and 16 V at idle.

With CONSULT-II
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.

2. Start engine and run it for at least 6 seconds at idle speed.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
1. Start engine and run it for at least 6 seconds at idle speed.
2. Turn ignition switch OFF, wait at least 5 seconds and then turn ON.
3. Start engine and run it for at 6 seconds at idle speed.
4. Select "MODE 3" with GST.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.
- When using GST, "DTC Confirmation Procedure" should be performed twice as much as when using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. Therefore, using CONSULT-II is recommended.

EC-O2H1B1-01:

EC-O2H1B2-01:

Wiring Diagram

Diagnostic Procedure