DTC P24BB: EVAP System Leak Detection Pump Pressure Sensor Circuit High [11/2021 - ]: Procedure

1. Turn the ignition switch to ON.
2. Using GTS, read the value in [Atmosphere Pressure].

   Powertrain > Engine Control System > Data List 

   Tester Display
   Atmosphere Pressure

   Is the value of [Atmosphere Pressure] 125 kPa (938 mmHg, 36.9 inHg) or more?

   Result	Proceed to
   Yes	A
   No (Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.) HINT:  In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.	B

Result: 

B 

PERFORM SIMULATION TEST 

Result: 

A 

See step  2

1. Turn the ignition switch to OFF.
2. Disconnect the connector from ECM.
3. Disconnect the connector from the canister pump module.
4. Measure the resistance of harness between ECM connector and the canister pump module connector.

   Connector & terminal

   A5-62 (PPMP) - M23-7

   A5-54 (AVSS2) - M23-8

   Is the resistance less than 1 Ω?

   Result	Proceed to
   Yes	A
   No (Repair the following item.) Open circuit in harness between ECM connector and the canister pump module connector Poor contact of coupling connector	B

Result: 

B 

REPAIR RELATED PARTS 

Result: 

A 

See step  3

1. Check for poor contact of ECM and the canister pump module connector.

   Is there poor contact in ECM and the canister pump module connector?

   Result	Proceed to
   Yes (Repair the poor contact of ECM and the canister pump module connector.)	A
   No	B

Result: 

A 

REPAIR CONNECTOR 

Result: 

B 

See step  4

1. Turn the ignition switch to OFF.
2. Measure the voltage of harness between ECM connector and the canister pump module connector.

   Connector & terminal

   A5-53 (AVCC2) - Engine ground

   A5-54 (AVSS2) - Engine ground

   Is the voltage 1 V or higher?

   Result	Proceed to
   Yes (Repair the short circuit to power in harness between ECM connector and canister pump module connector.)	A
   No (Replace the canister pump module.)	B

Result: 

A 

REPAIR HARNESS OR CONNECTOR 

Result: 

B 

REPLACE CANISTER PUMP MODULE 

Refer to PROCEDURE - Step 5