DTC P0A1B-1F: Generator Control Module Circuit Intermittent [11/2018 - 08/2020]: Procedure
- CHECK DTC OUTPUT
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- 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 power switch off.
Result:
B
GO TO DTC CHART (HYBRID CONTROL SYSTEM)
Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 06/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2020 - 08/2020]
Result:
C
GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM)
Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2018 - 08/2020]
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 power switch on (READY), unless instructed by the repair Service Information because this may cause a malfunction.
- Disconnect the A51 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 A51-6 (+B) - 5 (IGCT relay) Power switch off Below 1 Ω A51-5 (+B2) - 5 (IGCT relay) Power switch off Below 1 Ω A51-24 (GND1) - Body ground Power switch off Below 1 Ω A51-23 (GND2) - Body ground Power switch off Below 1 Ω - Install the IGCT relay.
- Reconnect the A51 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 [11/2018 - 08/2020]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Check that the service plug grip is not installed.