DTC P0032:00 [MZ-CD 1.6]

id0102g8700500

DTC P0032:00

A/F sensor heater circuit high input

DETECTION CONDITION

•  If the input voltage to the A/F sensor heater drive terminal in the PCM is high for 5 s or more even though the A/F sensor is duty-controlled at 5 % or more by the PCM.

POSSIBLE CAUSE

•  A/F sensor connector or terminals malfunction

•  A/F sensor heater malfunction

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between A/F sensor terminal D and PCM terminal 203

•  PCM malfunction

DTC P0032:00	A/F sensor heater circuit high input
DETECTION CONDITION	• If the input voltage to the A/F sensor heater drive terminal in the PCM is high for 5 s or more even though the A/F sensor is duty-controlled at 5 % or more by the PCM.
POSSIBLE CAUSE	• A/F sensor connector or terminals malfunction • A/F sensor heater malfunction • PCM connector or terminals malfunction • Short to power supply in wiring harness between A/F sensor terminal D and PCM terminal 203 • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE AND/OR DTC • Switch the ignition to ON (engine off). • Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure. (See ON-BOARD DIAGNOSTIC TEST [MZ-CD 1.6].) • Is the other PENDING CODE/DTC also present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
3		No	Go to the next step.
4	INSPECT A/F SENSOR CONNECTOR AND TERMINALS • Switch the ignition to off. • Disconnect the A/F sensor connector. • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
4		No	Go to the next step.
5	INSPECT A/F SENSOR HEATER • Inspect the A/F sensor heater. • Is there any malfunction?	Yes	Replace the A/F sensor, then go to Step 8. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZ-CD 1.6].)
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR AND TERMINALS • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, and corrosion). • Is there any malfunction?	Yes	Repair or replace the connector or terminals, then go to Step 8.
6		No	Go to the next step.
7	INSPECT A/F SENSOR HEATER CIRCUIT FOR SHORT TO POWER SUPPLY • A/F sensor and PCM connectors are disconnected. • Switch the ignition to ON (engine off). • Measure the voltage between A/F sensor terminal D (wiring harness-side) and body ground. • Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to the next step.
7		No	Go to the next step.
8	VERIFY THAT DTC P0032:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Perform the KOEO self test. (See KOEO SELF TEST [MZ-CD 1.6].) • Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE [MZ-CD 1.6].)
9		No	DTC troubleshooting completed.