DTC P0A1B-1F: Generator Control Module Circuit Intermittent [12/2023 - ]: Procedure
- CHECK DTC OUTPUT
Pre-procedure1
- None.
- 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 U11B3-87 Lost Communication with Hybrid/EV Powertrain Control Module (ch5) Missing Message Hybrid control system U0110-87 Lost Communication with Drive Motor Control Module "A" Missing Message
Post-procedure1
- Turn the ignition switch off.
Result:
B
GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ]
Result:
C
GO TO DTC CHART (MOTOR GENERATOR CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ]
Result:
A
See step 2
- CHECK CONNECTOR CONNECTION CONDITION (HYBRID MOTOR CONTROL INVERTER 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 AUXILIARY BATTERY TERMINAL (CONTACT PROBLEM)
- Check the connection of the auxiliary battery terminal.
OK
The terminal is connected securely and there is no contact problem.
Result
Proceed to OK NG
Result:
NG
CONNECT SECURELY
Result:
OK
See step 4
- Check the connection of the auxiliary battery terminal.
- CHECK HARNESS AND CONNECTOR (HYBRID MOTOR CONTROL INVERTER ASSEMBLY - IGCT NO. 1 RELAY) WARNING:
Be sure to wear insulated gloves.
Pre-procedure1
- 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 service information because this may cause a malfunction.
- Disconnect the hybrid motor control inverter assembly connector.
- Remove the IGCT NO. 1 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 B89-36 (+B) - 5 (IGCT NO. 1 relay) Ignition switch off Below 1 Ω Ω B89-35 (+B2) - 5 (IGCT NO. 1 relay) Ignition switch off Below 1 Ω Ω B89-9 (GND1) - Body ground Ignition switch off Below 1 Ω Ω B89-8 (GND2) - Body ground Ignition switch off Below 1 Ω Ω Result
Proceed to OK NG
Post-procedure1
- Install the IGCT NO. 1 relay.
- Reconnect the hybrid motor control inverter assembly connector.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 5
- Check that the service plug grip is not installed.
- CHECK FOR INTERMITTENT PROBLEMS
- Check for intermittent problems.
HINT:
Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2023 - ]
- Check the connection and terminal contact pressure of the connectors and wire harnesses between the auxiliary battery and the hybrid motor control inverter assembly.
Result
There are no abnormalities in the wire harnesses and connectors.
Result
Proceed to OK NG - Check the connection and terminal contact pressure of the connectors and wire harnesses between the auxiliary battery and the hybrid motor control inverter assembly.
Result:
OK
REPLACE HYBRID MOTOR CONTROL INVERTER ASSEMBLY. Refer to REMOVAL [12/2023 - ]
Result:
NG
REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
- Check for intermittent problems.