2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1598
sensor by rapidly oscillating the motor and observing the position sensor signals.
Conditions for Running the DTC
Condition 1, 2, 3 and 4
* Hybrid wake-up signal is not active because the ignition has been transitioned from RUN to OFF.
* The MCM has learned a valid drive motor position sensor offset value at least once.
Condition 2
Motor speed is less than 20 RPM.
Conditions for Setting the DTC
Condition 1
Position sensor offset value not learned because drive motor speed is greater than 50 RPM.
Condition 2
Position sensor offset value not learned because hybrid battery voltage as observed at the MCM is less than 192V.
Condition 3
Position sensor offset value not learned because drive motor phase to phase current difference is less than 15 A.
Condition 4
Position sensor offset value not learned because the offset learn value is greater than the maximum allowed offset of 25 degrees.
Action Taken When the DTC Sets
* P1B10 and P1B0F are Type C DTCs.
* The MCM operates the drive motor generator using the last valid learned offset.
Conditions for Clearing the DTC
* P1B10 and P1B0F are Type C DTCs.
* High voltage remains enabled immediately following an ignition key transition from RUN to OFF.
Reference Information
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
1. Observe the BECM Contactor Sys. Req. Signal parameter. The HV contactor relays should be Closed, enabling the high voltage system.
瀚慖f the HV contactor relays are Open, diagnose and repair the DTCs which are preventing high voltage from being enabled.
2. Ignition OFF, wait 2 minutes.
3. Ignition ON, wait 2 minutes and then turn ignition OFF.
4. Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.
瀚慖f the DTC has passed, clear DTC Information. No further diagnosis of this DTC is necessary.
Circuit/System Testing
1. Inspect for DTCs P0A40, P0A45, P0A46, P0A78, P0A79, P0A3F, P0C05, P0C08, P0C0B, P0C0E, P0C4E, P0C4F, P0C52, P0C53, P0C57,
P0C58, P0C61, P0C62, P0C5C, P0C5D, P1B03, P1B04 or P1B0D.
瀚慖f any of the above DTCs are set, diagnose and repair them prior to performing this diagnostic.
2. Ignition ON, engine OFF. Observe the BECM Hybrid Battery Pack Calculated parameter. The hybrid battery voltage should be greater than
192V.
瀚慖f the hybrid battery voltage is less than 192V, replace the drive motor generator battery.
3. Turn the ignition OFF and wait 2 minutes.
