Intermittent No Crank, Malfunction Indicator Lamp (MIL) Illuminated – DTCs P135A, P135B, P16A7 and/or P16AF Set – 2019 Buick Enclave & Chevrolet Traverse

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Service Bulletin Bulletin No.: 19-NA-119
Date: June, 2019
TECHNICAL
Subject: Intermittent No Crank, Malfunction Indicator Lamp (MIL) Illuminated – DTCs P135A,
P135B, P16A7 and/or P16AF Set
This bulletin replaces PIE0513. Please discard PIE0513.
Brand: Model:
Model Year: Vehicle Build Date:
Engine: Transmission:
from to from prior to
Buick Enclave
2019 2019 SOP Feb.
22, 2019
Equipped with
3.6L Engine
(RPO LFY)
Equipped with
Automatic
Transmission
(RPO M3V)
Chevrolet Traverse
Involved Region or Country North America, Middle East, Israel, Russia and South America
Condition
Some customers may comment on one or more of the following conditions:
• MIL illuminated
• Intermittent no crank
A technician may find one or more of the following DTCs set:
• P135A: Ignition Coil Supply Voltage Circuit Bank 1
• P135B: Ignition Coil Supply Voltage Circuit Bank 2
• P16A7: Engine Controls Ignition Relay Feedback Circuit 2
• P16AF: Engine Controls Ignition Relay Feedback Circuit 2 Low Voltage
Cause This condition may be caused by loose terminal tension located in the underhood fuse
block.
Correction If any of the above conditions are present, the underhood fuse block must be inspected
for loose or damaged terminals.
Page 2 June, 2019 Bulletin No.: 19-NA-119
Service Procedure
1. Remove the underhood fuse block access cover.
2. Using a Digital Volt Ohm Meter (DVOM), select
millivolt (mV).
5341449
3. Utilizing an alligator clip or equivalent, apply the
positive DVOM lead to the positive cable (B+)
stud (1).
4. With the vehicle in PARK and the parking brake
set, start the vehicle.
⇒ Allow the engine to idle.
Note: The fuses in the X50A Fuse Block may appear
not fully seated as they will be able to be pressed down
further into fuse block. This is normal and does not
indicate a fuse block failure.
5. Apply the negative DVOM lead to the appropriate
outboard terminal fuse test port for the following
diagnostic trouble codes. Refer to Document
ID: 5129085:
– For P135B probe F60 (2)
– For P16A7 or P16AF; probe F66 (3)
– For P135A; probe F67 (4)
6. Record the voltage readings:
• If the voltage is LESS than 200mV, proceed to
step 7.
• If the voltage is MORE than 200mV, replace the
X50A Fuse Block – Underhood and proceed to
step 9. Refer to Fuse Block Replacement,
Underhood Electrical Center or Junction Block
Replacement in SI.
7. Check the terminal for sufficient tension of the
corresponding terminal in X50A Fuse Block –
Underhood X4 using diagnostic test probe
J-35616-35 (VT) or equivalent. Refer to
Document ID: 4919719:
– F60 – X50A Fuse Block – Underhood X4
terminal 37
– F66 – X50A Fuse Block – Underhood X4
terminal 25
– F67 – X50A Fuse Block – Underhood X4
terminal 23
– Starter Pinion Solenoid Actuator Relay – X50A
Fuse Block – Underhood X4 terminal 2
8. Repair and/or replace the terminal as necessary.
Refer to Repairing Connector Terminals (Terminal
Repair) in SI.
9. Install the fuse block access cover.
Bulletin No.: 19-NA-119 June, 2019 Page 3
Warranty Information
Note: Only use the Add Time that coincides with the
repair performed.
For vehicles repaired under the Bumper-to-Bumper
coverage (Canada Base Warranty coverage), use the
following labor operation. Reference the Applicable
Warranties section of Investigate Vehicle History (IVH)
for coverage information.
Labor
Operation
Description Labor Time
5480688* Test Terminals and
Clear DTCs
0.3 hr
Add Fuse Block Removal and
Install
0.4 hr
Add Terminal Replacement 0.5 hr
Add Each Additional Terminal
Replacement
0.1 hr
5430440 Fuse Block Replacement
Use the
Published
Labor
Operations
Time
*This is a unique Labor Operation for Bulletin use only.
Version 1
Modified Released June 03, 2019

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