BULLETIN NOTES
This bulletin supersedes the previously issued Service Alert(s) listed below.
Previous SAs:

Date(s) Issued:

SA-051/23

09/01/23

Applicable Models/VINs:
2024 CX-90 PHEV

DESCRIPTION
Some customers may experience a vehicle no start (no "Ready-ON") due to the 12V battery discharged or the High
Voltage (HV) battery discharged. This may be caused by:
• Ignition left ON when exiting the vehicle (exiting the vehicle during "Ready-On").
• Door/liftgate opened multiple times without ignition "Ready-ON" or driving vehicle.
• Installation of aftermarket electronic devices.
To minimize THE battery drain concern, ensure that the vehicle shift selector is in Park when exiting and verify the
ignition is turned OFF when exiting.
NOTE: If multiple door/liftgate opening without "Ready-ON', drive vehicle to charge 12V battery.
Customers having this concern should have their vehicle repaired using the following repair procedure.

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REPAIR PROCEDURE

Conditions

12V
Battery

High Voltage Battery

Repair
1. Jump Start the 12V battery. Did vehicle start?

Condition
Discharged
1

Unknown

• Yes - Charge the 12V battery
• No With MDARS - Go to Condition 2,
MDARS PID data check and Repair.
Without MDARS - Go to Condition 3,
Infotainment Center Display SOC
% check and Repair.
○

○

1. Charge the HV Battery using wall charger.
Note: If a wall charger is not available, go to
next step.
2. Using a donor PHEV vehicle (A) with a high
SOC%, turn on the AC Power Outlet (120 V/1,500
W)
a. Ignition ON without depressing brake
pedal "Not Ready-ON"
b. Press the power switch 2 times.

Discharged
Condition
2

12V
Battery is
OK
MDARS is
(12.4 V or
available
higher)
for use

MDARS ->
PID/DATA MONITOR TABLE [MHB (eSKYACTIV PHEV)]
PID data:
•
•

HV_BATT_SOC - 0-6%
HV_BATT_VOLT - below 300V

c. The indicator light flashes and turns on
solid amber when it is ready to be used.

d. Open the lid and connect the vehicle
supplied HV charge cable (B).
3. Connect the other end of the vehicle supplied
HV charge cable to the vehicle (C) charge port.
Vehicle (C) charge port indicator will illuminate
solid green.
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(A) - Doner vehicle equipped with 1500w
charging outlet and with high HV Battery
SOC%.
(B) - Vehicle supplied HV charge cable
(C) - Vehicle with discharged HV Battery
4. When vehicle (C) shows PID data HV_BATT_
SOC 7% or higher, try to start vehicle.
1. Charge the HV Battery using wall charger.
Note: If a wall charger is not available, go to
next step.
2. Using a donor PHEV vehicle (A) with a high
Discharged
Infotainment Center Display -> Information SOC%, turn on the AC Power Outlet (120 V/1,500
W)
a. Ignition ON without depressing brake
pedal "Not Ready-ON"
b. Press the power switch 2 times.

Condition
3

-> High Voltage Battery Monitor

12V
Battery is
MDARS is
OK
NOT
(12.4 V or
available
higher)
for use

c. The indicator light flashes and turns on
solid amber when it is ready to be used.
-> Battery Charge Level - - - - %

d. Open the lid and connect the vehicle
supplied HV charge cable (B).
3. Connect the other end of the vehicle supplied
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HV charge cable to the vehicle (C) charge port.
Vehicle (C) charge port indicator will illuminate
solid green.

(A) - Doner vehicle equipped with 1500w
charging outlet and with high HV Battery
SOC%.
(B) - Vehicle supplied HV charge cable
(C) - Vehicle with discharged HV Battery
4. When vehicle (C) shows Battery Charge Level 1
% or higher, try to start vehicle.

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