Advanced Diagnostics

Advanced Diagnostics - DTC P1570 (66): Battery Module Individual Voltage Problem






General Description
The high voltage side resistance of the isolation gain offset circuit in the battery condition monitor (BCM) module is divided to measure the voltage that is found in adjacent channels when the circuit is open. When there is an open in the line shared by adjacent channels, the difference between the maximum voltage and the minimum voltage increases. When the difference between the maximum and minimum voltage is a specified value, the BCM module detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The difference between the maximum and minimum voltage is 3 V or more for at least 2 seconds.

Driving Pattern
1. Start the engine.
2. Hold the engine speed between 3,500 - 4,000 rpm without load (in P or N) and wait until 2/3 of the indicator segments on the IMA battery level gauge (BAT) illuminate.

- If you have difficulty duplicating the DTC, retest after turning off electrical components such as the audio system and A/C, and try a different gear position.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM and the BCM module memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.