• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The starter/generator control module (SGCM) phase U/V/W current sensors are used for motor control and power inverter module (PIM) current sensor rationality check. The SGCM monitors the current sensor for the following:
• | To detect a failure of the U/V/W-phase current sensor circuit below valid range |
• | To detect a failure of the U/V/W-phase current sensor circuit above valid range |
If one of the above conditions is detected, the SGCM will set the appropriate DTC.
• | Engine is running. |
• | Wakeup signal is ON. |
Sensor output voltage at high side less than 0.5 volt for 0.5 ms
Sensor output voltage at high side greater than 4.5 volts for 0.5 ms
• | Stop PWM (MGU shutdown) |
• | APM PWM OFF |
• | Battery disconnection (disconnect SW on/off) |
U-phase current sensor circuit within valid range
V-phase current sensor circuit within valid range
W-phase current sensor circuit within valid range
Possible Electrical failure at current sensor with short to ground or open
Possible electrical failure at current sensor with short to voltage
Hybrid Controls Connector End Views
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.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for SGCM replacement, setup, and programming