DTC P0A1B-1F: Generator Control Module Circuit Intermittent [02/2019 - ]: Procedure
- CHECK DTC OUTPUT
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Enter the following menus: Powertrain / Hybrid Control and Motor Generator / Trouble Codes.
- Check for DTCs.
Powertrain > Hybrid Control > Trouble Codes
Powertrain > Motor Generator > Trouble Codes
Result
Result Proceed to P0A1B-1F only is output. A DTCs of hybrid control system in the tables below are output. B DTCs of motor generator control system in the tables below are output. C Malfunction Content System Relevant DTC Communication malfunction Motor generator control system P3124-87 Lost Communication between Drive Motor "A" and HV ECU Missing Message Hybrid control system P3123-87 Lost Communication with Drive Motor Control Module "A" from Hybrid/EV Control Module Missing Message U0110-87 Lost Communication with Drive Motor Control Module "A" Missing Message - Turn the ignition switch off.
Result:
B
GO TO DTC CHART (HYBRID CONTROL SYSTEM)
Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2019 - 06/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 12/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [12/2021 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]
Result:
C
GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)
Refer to DIAGNOSTIC TROUBLE CODE CHART [02/2019 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]
Result:
A
See step 2
- CHECK CONNECTOR CONNECTION CONDITION (INVERTER WITH CONVERTER ASSEMBLY CONNECTOR)
See step 3
Result
Result Proceed to OK A NG (The connector is not connected securely.) B NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C Result:
B
CONNECT SECURELY
Result:
C
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
A
See step 3
- CHECK HARNESS AND CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY - IGCT RELAY) WARNING:
Be sure to wear insulated gloves.
- Check that the service plug grip is not installed.NOTE:
After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair Service Information because this may cause a malfunction.
- Disconnect the A87 inverter with converter assembly connector.
- Remove the IGCT relay from the No. 3 relay block and junction block assembly.
- Measure the resistance according to the value(s) in the table below.
*1 No. 3 Relay Block and Junction Block Assembly *2 IGCT Relay *a Front view of wire harness connector
(to Inverter with Converter Assembly)- - Standard Resistance
Tester Connection Condition Specified Condition A87-36 (+B) - 5 (IGCT relay) Ignition switch off Below 1 Ω A87-35 (+B2) - 5 (IGCT relay) Ignition switch off Below 1 Ω A87-9 (GND1) - Body ground Ignition switch off Below 1 Ω A87-8 (GND2) - Body ground Ignition switch off Below 1 Ω - Install the IGCT relay.
- Reconnect the A87 inverter with converter assembly connector.
Result
Proceed to OK NG
Result:
OK
REFER TO REPLACE INVERTER WITH CONVERTER ASSEMBLY PARTS
Refer to DTC CHECK / CLEAR [02/2019 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Check that the service plug grip is not installed.