Diagnosis Procedure
- CHECK DTC PRIORITY
If DTC P0053 is displayed with DTC 0031, 0032 or P0130, first perform the confirmation procedure (trouble diagnosis) for DTC 0031, 0032 or P0130.
Is DTC P0031, P0032 or P0130 detected?
YES
Perform diagnosis of applicable.
- P0130: Refer to DTC Description .
- P0031: Refer to DTC Description .
- P0032: Refer to DTC Description .
NO
GO TO 2.
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 (BANK 1) HEATER
Check the A/F sensor 1 (bank 1) heater. Refer to Component Inspection (A/F Sensor) .
Is the inspection result normal?
YES
GO TO 3.
NO
Replace air fuel ratio (A/F) sensor 1 (bank 1). Refer to EXHAUST MANIFOLD AND THREE WAY CATALYST .
- CHECK A/F SENSOR 1 (BANK 1) POWER SUPPLY-1
- Turn ignition switch ON.
- Check the voltage between A/F sensor 1 (bank 1) harness connector and ground.
+
-
Voltage
A/F sensor 1 (bank 1)
Connector
Terminal
F72
1
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 8.
NO
GO TO 4.
- CHECK A/F SENSOR 1 (BANK 1) POWER SUPPLY-2
Check the voltage between IPDM E/R harness connector and ground.
+
-
Voltage
IPDM E/R
Connector
Terminal
F19
53
Ground
Battery voltage
Is the inspection result normal?
YES
GO TO 7.
NO
GO TO 5.
- CHECK FUSE
- Turn ignition switch OFF.
- Check that the following fuse is not blowing.
Location
Fuse No.
Capacity
IPDM E/R
#40
15A
Is the fuse blown (open)?
YES
Replace the fuse after repairing the applicable circuit.
NO
GO TO 6.
- CHECK IPDM E/R POWER SUPPLY AND GROUND CIRCUIT
Check IPDM E/R power supply and ground circuit. Refer to Diagnosis Procedure .
Is the inspection result normal?
YES
Replace IPDM E/R. Refer to Removal and Installation .
NO
Repair or replace error-detected parts.
- CHECK A/F SENSOR 1 (BANK 1) HEATER POWER SUPPLY CIRCUIT
- Disconnect IPDM E/R harness connector.
- Check the continuity between IPDM E/R harness connector and A/F sensor 1 (bank 1) harness connector.
IPDM E/R
A/F sensor 1 (bank 1)
Continuity
Connector
Terminal
Connector
Terminal
F19
53
F72
1
Existed
- Check harness for short to ground.
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.
- CHECK A/F SENSOR 1 (BANK 1) HEATER OUTPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between A/F sensor 1 (bank 1) harness connector and ECM harness connector.
A/F sensor 1 (bank 1)
ECM
Continuity
Connector
Terminal
Connector
Terminal
F72
2
F79
94
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
INSPECTION END
NO
Repair or replace error-detected parts.