DTC P0443:00 [MZR 1.5, MZR 1.6]

id0102f0704500

DTC P0443:00

Purge solenoid valve circuit problem

DETECTION CONDITION

•  If the voltage of the purge solenoid valve control signal remains low or high, the PCM determines that there is a purge solenoid valve control circuit problem.

Diagnostic support note

•  This is a continuous monitor (CCM).

•  The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.

•  PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.

•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.

•  The DTC is stored in the PCM memory.

POSSIBLE CAUSE

•  Purge solenoid valve connector or terminals malfunction

•  Purge solenoid valve malfunction

•  Short to ground in wiring harness between the following terminals:

―  Purge solenoid valve terminal A—PCM terminal 2I

―  Purge solenoid valve terminal B—PCM terminal 2S

•  PCM connector or terminals malfunction

•  Short to power supply in wiring harness between purge solenoid valve terminal B and PCM terminal 2S

•  Purge solenoid valve circuits are shorted to each other

•  Open circuit in wiring harness between the following terminals:

―  Purge solenoid valve terminal A—PCM terminal 2I

―  Purge solenoid valve terminal B—PCM terminal 2S

•  PCM malfunction

DTC P0443:00	Purge solenoid valve circuit problem
DETECTION CONDITION	• If the voltage of the purge solenoid valve control signal remains low or high, the PCM determines that there is a purge solenoid valve control circuit problem. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. • PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle. • FREEZE FRAME DATA (Mode 2)/Snapshot data is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Purge solenoid valve connector or terminals malfunction • Purge solenoid valve malfunction • Short to ground in wiring harness between the following terminals: ― Purge solenoid valve terminal A—PCM terminal 2I ― Purge solenoid valve terminal B—PCM terminal 2S • PCM connector or terminals malfunction • Short to power supply in wiring harness between purge solenoid valve terminal B and PCM terminal 2S • Purge solenoid valve circuits are shorted to each other • Open circuit in wiring harness between the following terminals: ― Purge solenoid valve terminal A—PCM terminal 2I ― Purge solenoid valve terminal B—PCM terminal 2S • PCM malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot data on repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT PURGE SOLENOID VALVE CONNECTOR AND TERMINALS • Switch the ignition to off. • Disconnect the purge solenoid valve 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 10.
3		No	Go to the next step.
4	INSPECT PURGE SOLENOID VALVE • Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [MZR 1.5, MZR 1.6].) • Is there any malfunction?	Yes	Replace the purge solenoid valve, then go to Step 10. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].)
4		No	Go to the next step.
5	INSPECT PURGE SOLENOID VALVE CIRCUIT FOR SHORT TO GROUND • Purge solenoid valve connector is disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― Purge solenoid valve terminal A ― Purge solenoid valve terminal B • Is there continuity?	Yes	If the short to ground circuit could be detected: • Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: • Replace the PCM (short to ground in PCM internal circuit). (See PCM REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) Go to Step 10.
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 10.
6		No	Go to the next step.
7	INSPECT PURGE SOLENOID VALVE CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY • Purge solenoid valve and PCM connectors are disconnected. • Switch the ignition to ON (engine off). • Measure the voltage between purge solenoid valve terminal B (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 Step 10.
7		No	Go to the next step.
8	INSPECT PURGE SOLENOID VALVE CIRCUITS FOR SHORT TO EACH OTHER • Purge solenoid valve and PCM connectors are disconnected. • Switch the ignition to off. • Inspect for continuity between purge solenoid valve terminals A and B (wiring harness-side). • Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to each other, then go to Step 10.
8		No	Go to the next step.
9	INSPECT PURGE SOLENOID VALVE CIRCUIT FOR OPEN CIRCUIT • Purge solenoid valve and PCM connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ― Purge solenoid valve terminal A—PCM terminal 2I ― Purge solenoid valve terminal B—PCM terminal 2S • Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [MZR 1.5, MZR 1.6].) • Start the engine. • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [MZR 1.5, MZR 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 [MZR 1.5, MZR 1.6].) Go to the next step.
10		No	Go to the next step.
11	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZR 1.5, MZR 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZR 1.5, MZR 1.6].)
11		No	DTC troubleshooting completed.