TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN 20TC01

AIR INJECTION PUMPS AND AIR SWITCHING VALVES

CERTAIN 2012 TACOMA

The repair quality of covered vehicles is extremely important to Toyota. All dealership technicians performing
this recall are required to successfully complete the most current version of the E-Learning course “Safety
Recall and Service Campaign Essentials”. To ensure that all vehicles have the repair performed correctly;
technicians performing this recall repair are required to currently hold at least one of the following certification
levels:

• Certified (any specialty)
• Expert (any specialty)
• Master
• Master Diagnostic Technician
It is the dealership’s responsibility to select technicians with the above certification level or greater to
perform this recall repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation
schedules to ensure there are properly trained technicians available to perform this repair at all times.

I.

OPERATION FLOW CHART
Verify Vehicle Eligibility
1. Confirm vehicle VIN matches the RO.
2. Check Vehicle Inquiry System for
Campaign eligibility.

Not
..Covered..

No further action required

Covered

Perform Health Check. Are DTC s P2444,
P2445 and/or P0418 present?

YES

• Replace Air Pump Assembly
• Install Air Switching Valve Kit
• Install Air Pump Cover

No
• Install Air Pump Repair Kit
• Install Air Switching Valve Kit
• Install Air Pump Cover

Campaign completed, return
the vehicle to the customer

II. IDENTIFICATION OF AFFECTED VEHICLES
1. CHECK VEHICLE FOR CAMPAIGN ELIGIBILITY
a. Compare the vehicles VIN to the VIN listed on the Repair Order to ensure they match.
b. Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and
that it has not already been completed.
Note: TMNA warranty will not reimburse dealers for repairs completed on vehicles that are not
affected or were previously completed, even by another dealer.

2

III. PREPARATION
A.

PARTS

Parts for vehicles with None of the applicable DTC’s:
Part Number

Part Description

Quantity

04008-34131

Air Switching Valve Kit*

1

04008-3520C

Air Pump Repair Kit**

1

17613-0P010

Cover, Air Pump

1

Part Number
25710-31022
17377-31010
17376-50010

Part Number
90166-A0010
17617-0C010
17602-0C010

*The Air Switching Valve Kit includes the following parts:
Part Description
Valve Assembly, Air Switching
Gasket, Air Tube ,No.2
Gasket, Air Tube (not used in repair)
*The Air Pump Repair Kit includes the following parts:
Part Description
Screw, Hexalobular Tapping
Filter, Air Pump
Cover Sub-Assembly, Air Pump Filter (w/ Air Pump Inlet)

Quantity
1
2
2

Quantity
1
1
1

Parts for vehicles with DTC’s P2444, P2445 and/or P0418:
Part Number

Part Description

Quantity

04008-34131

Air Switching Valve Kit*

1

17610-0W020

Assembly, Air Pump

1

17613-0P010

Cover, Air Pump

1

Part Number
25710-31022
17377-31010
17376-50010

B.

*The Air Switching Valve Kit includes the following parts:
Part Description
Valve Assembly, Air Switching
Gasket, Air Tube ,No.2
Gasket, Air Tube (not used in repair)

Quantity
1
2
2

TOOLS & EQUIPMENT
• Techstream 2.0 / TIS Techstream /Techstream Lite
• Torque Wrench
• Torx Socket E8

• Standard Hand Tools
• Torx Socket T25

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IV. BACKGROUND
There is a possibility that moisture in the air may cause a filter in the vehicle emissions system
to degrade. This degradation could cause damage to other parts of the vehicle emission
system and illuminate the check engine light (Malfunction Indicator Light).

4

V. COMPONENTS

5

VI.

INSPECTION
1. CHECK FOR DTC’S
a. Using a Techstream, check for Diagnostic Trouble Codes.

Note: This Service Campaign covers only the Air Pump and Air
Switching Valves, as detailed in these instructions. It does not
cover the diagnosis or replacement of any other parts on the
vehicle.

Is DTC P2444, P2445 and/or
P0418 present?
YES..
Air Pump Assembly will require
replacement. Proceed to Section VIII
REPLACE AIR PUMP ASSEMBLY on p. 8

No..
Replacement of the Air Pump Assembly will
NOT be necessary. Proceed to Section VII
INSTALL AIR PUMP REPAIR KIT on p. 7

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VII.

INSTALL AIR PUMP REPAIR KIT
1. REPLACE AIR PUMP FILTER
a. Using a T25 Torx socket, remove the hexalobular tapping
screw and air pump filter cover sub-assembly.

b. Remove the air pump filter.

c. Install the NEW air pump filter.

Be sure install the air pump filter in the correct
position.

d. Install the NEW air pump inlet to the NEW air pump filter
cover sub-assembly.

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e. Using a T25 Torx socket, install the NEW air pump filter
cover sub-assembly with the NEW hexalobular tapping
screw.

2. INSTALL THE NEW AIR PUMP COVER
a. Install the NEW air pump cover with 3 claws.

Skip to Section IX Air Switching
Valve Replacement on p. 11

VIII. REPLACE AIR PUMP ASSEMBLY
Air Pump Assembly replacement is only necessary if DTC’s P2444, P2445 and/or
P0418 are present. DO NOT replace the air pump unless these DTC’s are
present. Install the Air Pump Repair Kit if these DTC’s are not present.
1. REMOVE ORIGINAL AIR PUMP ASSEMBLY
a. Disconnect the No. 1 air injection system hose.
b. Disconnect the air pump connector.

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c. Remove the 3 bolts.
d. Remove the air pump with bracket.

e. Disconnect the 2 wire harness clamps.

f. Disengage the 3 fittings of the air pump insulator, and
remove the air pump from the bracket.

g. Disengage the 4 claws and remove the air pump inlet from
the original air pump assembly.
h. Install the air pump inlet to the NEW air pump assembly.

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2. INSTALL NEW AIR PUMP ASSEMBLY
a. Install the NEW Air Pump Assembly onto the original
bracket.
b. Engage the 3 fittings.
c. Connect the 2 wire harness clamps.

d. Install the NEW air pump with bracket with 3 bolts into the
vehicle.
Torque: 8.0 N∙m {82 kgf∙cm, 71 in∙lbs}

e. Connect the No. 1 air injection system hose.
f. Connect the air pump connector.

3. INSTALL THE NEW AIR PUMP COVER
a. Install the NEW air pump cover with 3 claws.

Continue to Section IX Air Switching
Valve Replacement on p. 11
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IX.

AIR SWITCHING VALVE REPLACEMENT
1. REMOVE AIR SWITCHING VALVE ASSEMBLY
a. Remove the 2 bolts from the No. 2 air cleaner hose.
b. Unlock the 2 clamps and remove the air cleaner cap subassembly with No. 2 air cleaner hose.

c. Loosen the clip and disconnect the air tube assembly.

d. Disconnect the 2 air switching valve connectors.
e. Disconnect the wire harness clamp.
f. Remove the bolt and the wire harness bracket.

g. Remove the 2 bolts, disconnect the No. 1 air tube.
h. Remove the 2 nuts, disconnect the No. 2 air tube.

i. Remove the bolt and 2 nuts.

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j. Using an E8 Torx socket, remove the 2 studs.

k. Remove the air switching valve assembly.

l. Remove the 2 gaskets.

2. INSTALL THE NEW AIR SWITCHING VALVE ASSEMBLY
a. Set a NEW gasket on the No. 2 air tube side of the NEW
air switching valve assembly.

b. Align the position of the air switching valve assembly’s
stud bolt and insert it into the flange of the No. 2 air tube.

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c. Position the air switching valve assembly to create a gap
and attach the NEW gasket to the flange of the No. 1 air
tube.

d. Using an E8 Torx socket, install the 2 stud bolts.
Torque: 10 N∙m {102 kgf∙cm, 84 in.lbs}

e. Tighten the bolt and 2 nuts evenly to install the air
switching valve assembly.
Torque: 19 N∙m {194 kgf∙cm, 14 ft.lbs}

f. Connect the No. 2 air tube with 2 nuts.
Torque: 10 N∙m {102 kgf∙cm, 84 in.lbs}

g. Connect the No. 1 air tube with 2 bolts.
Torque: 10 N∙m {102 kgf∙cm, 84 in.lbs}

h. Install the wire harness bracket with the bolt.
Torque: 8.0 N∙m {82 kgf∙cm, 71 in.lbs}

i. Connect the 2 air switching valve connectors.

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j. Connect the air tube assembly with the clip.

k. Install the air cleaner cap sub-assembly with No. 2 air
cleaner hose and lock the 2 clamps.
l. Install the 2 bolts.
Torque: 12 N∙m {122 kgf∙cm, 108 in.lbs}

2. CHECK FOR DTC’S
a. Clear current DTC’s.
b. Check for new DTC’s.
If any related DTC’s are present, diagnose the system to
determine the cause.

◄ VERIFY REPAIR QUALITY ►
•

Confirm that no DTC’s are present.

If you have any questions regarding this update, please contact your regional
representative.

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10. APPENDIX
A. PARTS DISPOSAL
In accordance with Federal law, please make sure all recalled parts (original parts)
removed from the vehicle are disposed of in a manner in which they will not be reused,
unless requested for parts recovery return.

B. CAMPAIGN DESIGNATION DECORDER

19TA01
19

T

A

01

Year Campaign
is Launched

Vehicle Make

Field Action Category and Phase

Field Action Sequence

A = Safety Recall Remedy
B = Safety Recall Interim
C = Special Service Campaign
D = Limited Service Campaign
E = Customer Support Program
F = Emissions Recall

01 = 1st Field Action of the year
02 = 2nd Field Action of the year
03 = 3rd Field Action of the year

19 = 2019
20 = 2020
21 = 2021
22 = 2022
23 = 2023
Etc...

T = Toyota
L = Lexus

(May use other characters in unique
cases)

(The sequence is unique for each
Field Action category)
(May use other characters in
unique cases)

Examples:
19TA01 = Launched in 2019, Toyota, Safety Recall Remedy Phase, 1st Safety Recall Launched in 2019
20TC02 = Launched in 2020, Special Service Campaign, 2nd Special Service Campaign Launched in
2020
21TE05 = Launched in 2021, Customer Support Program, 5th Customer Support Program Launched in
2021

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