Diagnostic Instructions
DTC Descriptors
DTC P1A6D: Starter/Generator Control Module System Voltage Low
DTC P1A6E: Starter/Generator Control Module System Voltage High
Circuit/System Description
The starter/generator control module (SGCM) monitors the system voltage sensor to detect for a shorted low or high condition.
Conditions for Running the DTC
P1A6D, P1A6E
Conditions for Setting the DTC
P1A6D
| • | Sensor output voltage is less than 0.2 volt (30.0 volts). |
| • | The 12-volt power supply - 12-volt output voltage is greater than 5 volts for 0.5 ms. |
P1A6D
| • | Sensor output voltage is greater than 3.84 volt (1.56 volts). |
| • | 12-volt power supply - 12-volt output voltage is greater than 5 volts for 0.5 ms. |
Action Taken When the DTC Sets
Hybrid system is disabled.
Conditions for Clearing the DTC
Wake up signal is ON.
Reference Information
Schematic Reference
Hybrid Controls Schematics
Connector End View Reference
Hybrid Controls Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Caution: To help avoid personal injury, additional precautions must be taken prior to working on the generator control module or the generator starter. After removing the 36V battery cables from the generator battery, remove both
engine wiring harness connectors from the generator control module. Wait at least 5 minutes and then remove the generator control module cover. Verify voltage levels at all 36V, 12V, and 3-phase connections, are less than 3 volts using
a DMM before proceeding.
P1A6D, P1A6E
- If DTC is history, refer to
Testing for Intermittent Conditions and Poor Connections
.
- If DTC is current, replace the SGCM.
Repair Instructions
Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
Control Module References
for SGCM replacement, setup, and programming
