File in Section:

Service Bulletin

Bulletin No.:
Date:

PIP4843B
September, 2012

PRELIMINARY INFORMATION
Subject:

(EREV) Drive Motor Generator Control Module (PIM) Part Restriction

Models:

2011 - 2013 Chevrolet Volt

This PI was superseded to update model and model years. Please discard PIP4843A.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
As part of our ongoing quality improvement process, effective November 1st, 2010 the (Drive Motor Generator
Control Module, also known as PIM) for the Chevrolet Volt part number 12643810 is being placed on restriction
through the GM TAC (Technical Assistance Center).
Note: If the part is being ordered for a non warrantable concern (i.e. collision, theft, fire...etc.) proceed directly to
step 5 below (Valid VIN and proof of ownership required).
Important: When replacing TPIM it will be necessary to order seal kit part number 24258145.

Recommendation/Instructions:
1. Please have a Volt technician follow the procedures below prior to contacting TAC.
Important: Note: Do NOT erase DTC's in any of the modules (Especially on intermittent concerns.) and do NOT
attempt to reprogram software!
2. Please complete the customer questionnaire at the bottom of this document with as much information as
possible and as accurately as possible so that it can be e-mailed to TAC.
3. Check and record all diagnostic codes in all modules on the vehicle.
4. Be sure to record what module the DTC came from and any symptom codes associated with the DTCs (see
latest version of bulletin 07-07-30-010A for snapshot information).
5. If DTC's are set in any of the modules below, please save the captured data for later use.
Engine Control Module
Hybrid Control Module
Hybrid Control Module 2
Motor Control Module 1 & 2
Transmission Control Module
Auxiliary Transmission Fluid Pump Control Module
6. Once the above information has been obtained, please review all P.I and TSB information and all available S.I.
diagnostics.
7. If diagnostics lead to PIM replacement, contact TAC @ 877-446-8227 (U.S.) or in Canada 1-800-263-7740
(English) or 1-800-263-7960 (French) to review case details. Please have as much stored DTC and snapshot
information as possible prior to contacting TAC.
8. After reviewing the diagnosis, if component replacement is needed, TAC will arrange for ordering of the new
component and request that it be shipped overnight.
Note: After reviewing the diagnosis, if component replacement is needed, GM Goodwrench TAC will arrange for
ordering of the part(s). When this occurs, record the last 9 digits of the TAC case # to be used by the parts
department (in conjunction with the part #) as the CONTROL NUMBER to track shipment of the part. It is not
necessary to call TAC for part tracking information.
9. Prior to PIM replacement take resistance measurements of the module (see chart below).

2543238

2543239

2543241

2543242

2543243

2543244

Driving Condition Customer Questionnaire
Please have the customer answer as many questions below and as accurately as possible.
What was the weather like during the event? (Circle)
Sunny, Rain, Snow, Overcast
What was the temperature outside at the time of the event?
Below 0F-32F (-17C-0C) 32-60F (0C-15C) Above 60F (15C) Exact if possible_______
Were there any sounds at the time of concern? Y/N
If yes what type?
Were there any odors at the time of concern? Y/N
If yes, what type and from what area of the vehicle?
What were the driving conditions during the concern?
Highway:
City:
Combination:
Estimate driving distance from starting point until the concern occurred.
Mileage___ Kilometers ___
AND
Had the vehicle been driven from a cold start or had the vehicle already been driven and warm when the concern
occurred?
What type of event was this?
Shutdown while driving, no go from initial start, no go after driven?
If the event is a shutdown, please answer the following questions.
Was the engine running when the event occurred?
What type of road were you driving on when the event happened? (Circle one)
Paved, Gravel, Mud, Other_______
Were you accelerating or decelerating at the time? How aggressive was this?
How long has it been since the vehicle was previously driven? (Circle one)
1 hour 2-5 hours 5-8 hours 8 hours
Approximately what temperature was the vehicle stored at prior to this drive cycle? (Circle one)
Below 0F-32F (-17C-0C) 32-60F (0C-15C) Above 60F (15C) Exact if possible_______
What gear were you in when the event occurred? (Circle one)
Park, Reverse, Neutral, Drive, Manual Shifting
How fast were you going when the event occurred? (Circle one)
Stopped 0-10 mph (0-16kph) 10-30mph (16-48kph) 30-50mph (48-80kph) above 50mph (80kph)
If the event is a no crank
What % of driving is highway?
What % of driving is city?
Does the vehicle sit for extended periods of time? If so, record number of days.

Warranty Information:
For vehicles repaired under warranty use:
Labor Operation

Description

Labor Time

N5877

Drive Motor Generator Power
Inverter Module Replacement

Use Published Labor
Operation Time

Parts Information:
Model Year

Part Number

Description

Qty

2011-2013

2643810

T6 Power Inverter Module

1

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is
resolved without completing every step, the remaining steps do not need to be performed.