B23-009

Service Bulletin
March 1, 2023
23-009
Version 1
Engine Does Not Crank
AFFECTED VEHICLES
Year
Model
Trim
VIN Range
2016–20
MDX
ALL
ALL
SYMPTOM
The engine will not crank on the initial startup attempt after the vehicle has been exposed to precipitation and then
freezing temperatures.
POSSIBLE CAUSE
Water can enter the starter motor. In cold temperatures the water can freeze, preventing the starter motor from cranking
the engine.
CORRECTIVE ACTION
Replace the starter motor assembly if needed.
PARTS INFORMATION
Part Name
Part Number
Quantity
Starter Motor Assembly
31200-5J2-305
1
Flange Bolt (12x45)
90165-SDA-A00
2
Flange Bolt (12x120)
90051-5J4-000
1
Power Relay Assembly
39794-T5A-J01
2
Part Name
Part Number
Quantity
Relay Puller
07AAC-000A2A1
1
TOOLS INFORMATION
CLIENT INFORMATION:The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and
training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume
this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an
authorized Acura automobile dealer.
©
2023 American Honda Motor Co., Inc. — All Rights Reserved
Page 1 of 7
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
1161J0
Replace Starter motor
assembly and relays
(includes inspection)
0.9 hr
01601
03217
B23009A
31200-5J2-A53
INSPECTION PROCEDURE
1. Confirm that the engine does not crank.
2. Inspect the starter motor for signs of icing. If icing is found, warm up the starter motor either by gently applying heat
or allowing the vehicle to thaw inside the shop environment.
3. After the thawing period, attempt to crank/start the engine.
•
If the engine starts, go to REPAIR PROCEDURE.
•
If the engine doesn’t crank/start, continue with normal troubleshooting.
REPAIR PROCEDURE
1. Open the hood.
2. Remove the front bulkhead cover.
Page 2 of 7
3. Remove the air intake tube.
4. Disconnect the 12 volt battery.
4.1. Make sure the vehicle is in the OFF (LOCK) mode.
4.2. Disconnect and isolate the negative cable with the 12 volt battery sensor from the 12 volt battery.
NOTE:
•
Always disconnect the negative side first.
•
To protect the battery sensor connector from damage, do not hold it when removing the negative terminal.
•
Do not disconnect the battery sensor from the negative terminal.
4.3. Disconnect the positive cable from the battery.
Page 3 of 7
5. Disconnect the battery fan.
6. Remove the 12 volt battery.
Page 4 of 7
7. Remove the air cleaner.
8. Disconnect the connector, then remove the harness holder.
Page 5 of 7
9. Remove the skid block.
10. Disconnect the positive starter cable and connector, remove the harness connector and clamps, and then remove
the starter.
NOTE: Make sure the crimped side of the ring terminal faces away from the starter when you connect the positive
starter cable.
11. Install the new starter assembly.
12. Install all remaining parts in the reverse order of removal
13. Replace starter cut relay 1 and starter cut relay 2.
Page 6 of 7
14. Connect the HDS to the DLC.
NOTE: Make sure the HDS is loaded with the latest software version.
15. Turn the vehicle to the ON mode.
16. Select IDLE STOP STARTER COUNTER CLEAR in the ADJUSTMENT MENU with the HDS.
END
Page 7 of 7