DTC P1673
DTC P1673: IGHLD Relay Circuit
General Description
The battery condition monitor module commands IGHLD1 relay to turn ON or permit it to turn OFF to the motor control module. The battery condition monitor module monitors IGHLD1 relay voltage at all times. When the IGHLD1 relay output and the voltage does not match a specified time, a malfunction is detected and a DTC is stored.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 5.0 seconds or more |
| DTC Type | One drive cycle, MIL off, POWER SYSTEM indicator on, 12 VOLT CHARGING SYSTEM indicator off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage | 8.2 V | - |
Malfunction Threshold
One of these conditions is met for at least 5.0 seconds:
- The IGA voltage is 2.0 V or less when the IG HLD1 relay ON request is issued.
- The IGA voltage is 2.0 V or more when the IG HLD1 relay OFF request is issued.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- IG HLD1 relay IGHLD line short to ground
- IG HLD1 relay failure
- Battery condition monitor module internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the POWER SYSTEM indicator comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the battery condition monitor module memory. The MIL does not come on.
Conditions for clearing the DTC
The POWER SYSTEM indicator is cleared if the malfunction does not return in the next trip in which the diagnostic runs. The POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool clear command.