Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006COBALT SS, 4D SEDAN, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 723 (IMA SYSTEM)
2006 Chevrolet Cobalt SS, 4D Sedan, Standard
Section 723 (IMA System)
2006 Chevrolet Cobalt SS, 4D Sedan, StandardSECTION Section 723 (IMA System)
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
- Special Tools
- Service Precautions
- General Troubleshooting Information
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- MCM Inputs and Outputs at Connector A (31P)
- MCM Inputs and Outputs at Connector B (24P)
- MCM Inputs and Outputs at Connector C (22P)
- MCM Inputs and Outputs at Connector E (31P)
- IMA System
- Operating Conditions
- Auto Idle Stop System
- Auto Idle Stop Conditions
- Engine Restart Conditions
- ECT/IAT Auto Idle Stop Conditions
- Brake Booster Vacuum Auto Idle Stop Conditions
- SOC/Battery Temperature Auto Idle Stop Conditions
- In-Vehicle Humidity Auto Idle Stop Conditions
- Climate Control Unit Auto Idle Stop Conditions
- Intelligent Power Unit (IPU)
- Power Control Unit (PCU)
- IMA Motor
- Battery Module
- Junction Board
- IPU Module Fan
- Power Cables
- Circuit Diagram
- Component Location Index
- DTC Troubleshooting
- DTC P0562 (15): Motor Control Module (MCM) Power Source Circuit Unexpected Voltage; DTC P0562 (94): Motor Control Module (MCM) System Low Voltage
- DTC P0602 (91): Motor Control Module (MCM) Programming Error; DTC P0602 (92): Motor Control Module (MCM) Program Not Installed (Battery Condition Monitor Program)
- DTC P062F (60, 61): Motor Control Module (MCM) Internal Circuit EEPROM Error
- DTC P06B1 (79): Battery Current Sensor Circuit Malfunction
- DTC P0A1B (84): Motor Control Module (MCM) Internal Circuit Malfunction
- DTC P0A27 (46): High Voltage Contactor/Bypass Contactor Stays Activated
- DTC P0A3C (39): Motor Power Inverter (MPI) Module Overheating
- DTC P0A3F (89): Motor Rotor Position Sensor Circuit Malfunction
- DTC P0A5E (24): U Phase Motor Current Sensor Circuit Low Voltage
- DTC P0A5F (25): U Phase Motor Current Sensor Circuit High Voltage
- DTC P0A61 (26): V Phase Motor Current Sensor Circuit Low Voltage
- DTC P0A62 (27): V Phase Motor Current Sensor Circuit High Voltage
- DTC P0A64 (28): W Phase Motor Current Sensor Circuit Low Voltage
- DTC P0A65 (29): W Phase Motor Current Sensor Circuit High Voltage
- DTC P0A78 (32): Motor Power Inverter (MPI) Module Internal Circuit Malfunction
- DTC P0A7E (72): Battery Module Overheating
- DTC P0A7F (78): Battery Module Deterioration
- DTC P0A94 (48): DC-DC Converter Output Low Voltage
- DTC P0A9D (49): Battery Module Temperature Sensor 1 Circuit Low Voltage
- DTC P0A9E (50): Battery Module Temperature Sensor 1 Circuit High Voltage
- DTC P0AA6 (59): High Voltage Circuit Isolation Problem
- DTC P0AA7 (76): Motor Control Module (MCM) Internal Circuit Malfunction
- DTC P0AC0 (65): Battery Current Sensor 1 Circuit Malfunction
- DTC P0AC1 (115): Battery Current Sensor 1 Circuit Low Voltage
- DTC P0AC2 (114): Battery Current Sensor 1 Circuit High Voltage
- DTC P0AC7 (51): Battery Module Temperature Sensor 2 Circuit Low Voltage
- DTC P0AC8 (52): Battery Module Temperature Sensor 2 Circuit High Voltage
- DTC P0ACC (53): Battery Module Temperature Sensor 3 Circuit Low Voltage
- DTC P0ACD (54): Battery Module Temperature Sensor 3 Circuit High Voltage
- DTC P0AE1 (62): Bypass Contactor Malfunction
- DTC P0B0F (113): Battery Current Sensor 2 Circuit Malfunction
- DTC P0B10 (117): Battery Current Sensor 2 Circuit Low Voltage
- DTC P0B11 (116): Battery Current Sensor 2 Circuit High Voltage
- DTC P0BE6 (86): U Phase Motor Current Sensor Circuit Malfunction
- DTC P0BEA (87): V Phase Motor Current Sensor Circuit Malfunction
- DTC P0BEE (88): W Phase Motor Current Sensor Circuit Malfunction
- DTC P0BFD (30): Motor Current Sensor Circuit Malfunction
- DTC P1437 (41): Motor Power Inverter (MPI) Module Short Circuit
- DTC P1440 (57): Motor Power Inverter (MPI) module Output Circuit Malfunction
- DTC P1446 (74): Battery Module Individual Voltage Input Deviation
- DTC P1448 (63): Intelligent Power Unit (IPU) Module Fan Problem
- DTC P1570 (66): Battery Module Individual Voltage Problem
- DTC P1574 (68): Battery Module Temperature Signal Circuit Malfunction
- DTC P1575 (12): Motor Power Inverter (MPI) Module Voltage Malfunction
- DTC P1586 (23): Battery Current Sensor Signal Malfunction
- DTC P15A5 (85): Motor Current Sensor Circuit Malfunction
- DTC P15AA (93): Motor Rotor Position Not Learned
- DTC P15C4 (118): Auto Idle Stop System Malfunction
- DTC P1634 (47): Motor Power Inverter (MPI) Module Signal Circuit Malfunction
- DTC P1673 (22): Motor Control Module (MCM) Relay Stays Activated
- DTC P16C3 (31): DC-DC Converter Temperature Sensor Circuit Malfunction
- DTC U0029 (107,108): F-CAN Malfunction (BUS-OFF (Motor Control Module (MCM)));
- DTC U0038 (99): IMA-CAN Malfunction (BUS-OFF (Motor Control Module (MCM))); DTC U1204 (55): IMA-CAN Malfunction (Powertrain Control Module (PCM) - Motor Control Module (MCM))
- DTC U0100 (102,103): F-CAN Malfunction (Powertrain Control Module (PCM)-Motor Control Module (MCM))
- DTC U0155 (106): F-CAN Malfunction (Gauge Control Module-Motor Control Module (MCM))
- DTC U0311 (123): MCM and BCM Program Version Mismatch
- DTC U0312 (124): BCM, MCM and PGM-FI System Program Version Mismatch
- DTC U1220 (34): DC-DC Converter Lost Communication with Motor Control Module (MCM)
- DTC U1221 (35): Motor Control Module (MCM) Lost Communication with DC-DC Converter
- IMA System Indicator Circuit Troubleshooting
- Charging System Indicator Circuit Troubleshooting
- DLC Circuit Troubleshooting
- Auto Idle Stop System Inspection
- Auto Idle Stop System Troubleshooting
- IPU Cover Removal/Installation
- Motor Control Module (MCM) Update
- Motor Control Module (MCM) Removal/Installation
- DC-DC Converter Removal/Installation
- Motor Power Inverter (MPI) Module Removal/Installation
- IPU Case Removal/Installation
- Battery Module Removal/Installation
- IPU Module Fan Replacement
- IPU Module Air Duct Removal/Installation
- IMA Motor Power Cable Removal/Installation
- IMA Motor Rotor Removal/Installation
- Drain Cover Removal/Installation
- IMA Motor Housing Removal/Installation
- IMA Motor Rotor Position Sensor Removal/Installation
- Idle Stop Switch Signal Circuit Troubleshooting
- Idle Stop Switch Replacement
- Idle Stop Switch Adjustment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.