2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1713
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC P06B1
- Sensor Positive Voltage Circuit 1 Low Voltage
DTC P06B2
- Sensor Positive Voltage Circuit 1 High Voltage
DTC P06B4
- Sensor Positive Voltage Circuit 2 Low Voltage
DTC P06B5
- Sensor Positive Voltage Circuit 2 High Voltage
Circuit/System Description
The drive motor generator power inverter module (PIM) contains two motor control modules (MCM) and a hybrid powertrain control module
(HPCM). The MCMs share an internal 15 volt reference power supply in order to operate the drive motor sensors processors. This fault is handled
inside the PIM and no external circuits are involved.
Conditions for Running the DTC
* The control module runs the program to detect an internal fault when the key is ON.
* Ignition voltage is 8-18V.
Conditions for Setting the DTC
P06B1 or P06B4
The reference voltage is less than 12 V for 1 second.
P06B2 or P06B5
The reference voltage is greater than 18 V for 1 second.
Action Taken When the DTC Sets
* DTCs P06B1, P06B2, P06B4 and P06B5 are Type B DTCs.
* The PIM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTCs P06B1, P06B2, P06B4 and P06B5 are Type B DTCs.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Circuit/System Verification
1. Clear the DTC information.
2. Turn the ignition OFF for 1 minute.
3. Turn the ignition ON.
4. Retest for DTCs P06B1, P06B2, P06B4 and P06B5.
Circuit/System Testing
1. Clear the DTC and operate the vehicle under the condition for running and setting the DTC.
2. Shut the ignition OFF for 30 seconds, and verify that the DTC does not reset.
锟斤拷If the DTC resets, replace the PIM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
