DTC P0443-13: Evaporative Emission System Purge Control Valve "A" Circuit Open [09/2023 - ]: Procedure

Pre-procedure1

• Disconnect the fuel vapor feed hose (on the canister side) from the purge VSV.
• Put the engine in Inspection Mode (for measuring Exhaust Gas).

  Powertrain > Hybrid Control > Utility 

  Tester Display
  Inspection Mode

• Start the engine.

• When the purge VSV is operated using the GTS, check whether the port of the purge VSV applies suction to your finger.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *a	VSV is on
  *b	VSV is off

  Powertrain > Engine > Active Test 

  Tester Display
  Activate the EVAP Purge VSV

  OK

  GTS Operation	Specified Condition
  ON	Purge VSV port applies suction to finger
  OFF	Purge VSV port applies no suction to finger

  HINT: 

  Jiggle the wire harness and connector to increase the likelihood of detecting malfunctions that do not always occur.

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - ] 

Result: 

NG 

See step  2

Refer to INSPECTION [09/2023 - ]

Result

Result: 

NG 

REPLACE PURGE VSV. Refer to  REMOVAL [09/2023 - ] 

Result: 

OK 

See step  3

Pre-procedure1

• Disconnect the purge VSV connector.
• Turn the ignition switch to ON.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  C15-1 (+B) - Body ground	Ignition switch ON	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

See step  5

Result: 

OK 

See step  4

Pre-procedure1

• Disconnect the purge VSV connector.
• Disconnect the ECM connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  C15-2 (EVP1) - C27-16 (PRG)	Always	Below 1 Ω	Ω
  C15-2 (EVP1) or C27-16 (PRG) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [09/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Refer to PROCEDURE - Step 5

Result

Result: 

NG 

REPLACE EFI-MAIN NO. 3 RELAY 

Result: 

OK 

See step  6

Pre-procedure1

• Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  3 (EFI-MAIN NO. 3 relay) - Body ground	Always	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - EFI-MAIN NO. 3 RELAY) 

Result: 

OK 

See step  7

Pre-procedure1

• Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  1 (EFI-MAIN NO. 3 relay) - Body ground	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  8

Pre-procedure1

• Remove the EFI-MAIN NO. 3 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
• Disconnect the purge VSV connector.

• Measure the resistance according to the value(s) in the table below.

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  5 (EFI-MAIN NO. 3 relay) - C15-1 (+B)	Always	Below 1 Ω	Ω
  5 (EFI-MAIN NO. 3 relay) or C15-1 (+B) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - EFI-MAIN NO. 3 RELAY) 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR