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NHTSA ID Number: 10163654
Manufacturer Communication Number: PIC6089B
Summary
This Preliminary Information communication provides information to the technician about vehicles that may have a Battery Saver Message or red Battery Indicator displayed in the Driver Information Center. Technician may find Diagnostic Trouble Code P0AF8 set in history. Technician will need to the 12 volt battery using the GR8 Battery tester. The technician will need to perform the Direct current Power Conversion Test published in Global Service Information to check for maximum current and voltage output. This test requires the use of a Carbon Pyle load tester. In addition, the technician can select the 14V Power Module Control Function in the Engine Control Module and Accessory Power Module Setpoint in the Body Control Module by using the Scan Tool in order to check that the system is able to respond to current loads. If the test fails, if there were low voltage Diagnostic Trouble Codes or P0AF8 was set, the technician should confirm that the 200 amp fuse located in the X50D Fuse Block is torqued to correct specification. Technician should check the voltage on both sides of the 200 amp Fuse while there is a load applied and comparing the voltage readings. Voltage drop can be checked from the positive battery post to the Accessory Power Module side of the 200 amp fuse as well. If the Accessory Power Module will output current under a load but the voltage is low on both sides of the fuse when compared to the voltage output at the Accessory Power Module, check the following Service Information for any other Diagnostic Trouble Codes that may have led to the low voltage condition, Accessory Power Module output terminal is clean and torqued to specification, The Accessory Power Module output cable ring terminal is properly seated to the Accessory Power Module output terminal post and its condition, and test the voltage drop on the ground cables to the engine block, transmission, body and chassis to ensure they are within specification.
13 Affected Products
Vehicles
SEOCONTENT-START
Bulletin No.: PIC6089B Published date: 07/9/2019
Preliminary Information
PIC6089B (EREV) (BEV) Diagnostic Tips For Service Charging System, Battery Saver Message or Low
Battery Indicator Displayed On Electric Vehicles
Models
Brand: Model: Model Years:
VIN:
from to
Engine: Transmissions:
Chevrolet Spark EV 2014 – 2015 All All
N/A MME Chevrolet Volt 2011 – 2015
All All All All Cadillac
ELR
2014 – 2016 All All All All Opel
Ampera 2011 – 2014 All All All
All
Equipped with RPO EN0 Supersession Statement:
This PI was superseded to update Model Years. Please discard PIC6089A.
Condition / Concern
A customer or technician may comment that there is or was a Battery Saver Message or red Battery
Indicator displayed in the Driver Information Center (DIC).
There may or may not be any low voltage DTCs or P0AF8 set in history.
The Check Engine Lamp (CEL) or Service Vehicle Soon (SVS) Indicator may or may not be displayed.
Recommendations / Instructions
Check to see if the Accessory Battery may have been severely discharged and use the GR8 Battery
tester to test its condition.
The technician will need to perform the DC Power Conversion Test published in Global Service
Information (G.S.I.) to check for maximum current and voltage output.
This test requires the use of a Carbon Pyle load tester. In addition, the technician can select the
14V Power Module Control Function in the ECM and Accessory Power Module Setpoint in the BCM by
using the Scan Tool in order to check that the system is able to respond to current loads.
If the 12v Battery was discharged for any reason (example: testing, lighting was left on or the
vehicle left in Service Mode for an extended period of time), the technician may only need to
charge the 12V Battery to extinguish the message allowing a drive cycle afterwards before maximum
APM output will occur.
Please refer to the Charging System Description And Operation in Service Information.
If the test fails, if there were low voltage DTCs or P0AF8 was set, the technician should confirm
that the 200 amp fuse located in the X50D Fuse Block is torqued to correct specification.
Voltage should be checked on both sides of the 200 amp Fuse with a digital multi-meter
while there is a load applied and comparing the voltage readings. Voltage Drop can be
checked from the Positive Battery Post to the APM side of the 200 amp Fuse as well.
If the APM will output current under a load but the voltage is low on both sides of the fuse when
compared to the voltage output at the APM, check the following:
– Follow Service Information for any other DTCs that may have led to the low voltage condition.
– APM output terminal is clean and torqued to specification
– The APM Output Cable Ring Terminal is properly seated to the APM Output Terminal Post and its
condition
– Test the voltage drop on the ground cables to the Engine Block, Transmission, Body and Chassis to
ensure they are within specification
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.
SEOCONTENT-END
Bulletin No.: PIC6089B
Published date: 07/9/2019
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Bulletin No.: PIC6089A
Date: Jul-2015
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Bulletin No.: PIC6089
Date: Jun-2015
static.nhtsa.gov/odi/tsbs/2015/MC-10115054-9999.pdf
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