NHTSA ID Number: 10171203
Manufacturer Communication Number: IS-19923A
TSB/Document Date: 2020-02-08
Summary
Revision : Addition of Wiring Schematics at the end of this document
IS-19923A
Instruction Sheet
HVAC MODULE REPLACEMENT
(2000-2007 X-SERIES & 2004-2005 H-SERIES FULL HVAC)
Rev A 2020-01-06: Addition of Wiring Schematics at the end of this document
MATERIAL
Kit #IS19923 includes the following parts:
Part No.
23499009-FAC
Description
Qty
MCM PROGRAMMED FULL HVAC
1
I/O-EA MODULE
1
870008
DASH,HVAC CONTROL MODULE-MUX- FULL AIR
1
0600035
HVAC INTERFACE HARNESS WITH I/O-EA
1
0600036
OUTSIDE TEMP SENSOR HARNESS
1
0600037
DUAL TO SINGLE MOTOR WIRING ADAPTER
1
0600038
SINGLE MOTOR DRIVE HARNESS
1
0600039
DUAL MOTOR DRIVE HARNESS
1
871353
BLOWER DRIVE ASS, PWM FR DEFROSTER
1
563335
OUTSIDE TEMPERATURE SENSOR DELPHI
1
563332
MINI RELAY, 24V WITH RESISTOR
2
504637
CABLE TIE NYLON STD BLACK
15
5001374
SCR CAP HEX SS M5X10 FT
3
5001449
NUT HEX SS M5-.8
3
5001480
NUT HEX NYRT SS 8-32
1
IS-19923
INSTRUCTION SHEET (EN)
1
FI-19923
INSTRUCTION SHEET (FR)
1
22722846
Other parts that may be required:
Part No.
684685
Description
GLUE SIMSON ISR 70-03 BLACK, CARTRIDGE
Qty
1
NOTE
Material can be obtained through regular channels.
Writer:
IS-19923
Page 2 / 12
PROCEDURE
DANGER
Do not attempt to repair or service this vehicle without having sufficient training, the correct service
literature and the proper tools. Failure to follow this could make the vehicle unsafe and lead to serious
personal injury or death.
Lock out & Tag out (LOTO) must be performed during setup, maintenance or repair activities. Park
vehicle safely, apply parking brake, stop engine, trip the main circuit breakers as required & refer to
your local procedure for detailed information regarding the control of hazardous energy.
1. Remove the dashboard cover (5 Phillips head screws)
Writer: mg
IS-19923
Page 3 / 12
2. Remove the HVAC dashboard control module.
-
Unscrew the nut holding the control module to the dashboard (back of the control module).
-
Pull the control module out of the dash and disconnect the module (4 connectors).
3. Connect the two 563332 relays to the HVAC interface harness RFD1 & RFD2 connectors.
Writer: mg
IS-19923
Page 4 / 12
4. Connect the 22722846 I/O-EA module to the harness (J1-black, J2-purple & J3-dark blue
connectors).
5. Also connect the 23499009-FAC MCM module (JA-green & JB blue).
6. Lay the interface harness behind the dash and secure the modules previously connected to the under
dash support (use supplied cable ties); modules must fit securely under the cover. Also secure the
relay assembly.
Writer: mg
IS-19923
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7. Connect the vehicle harness to the interface harness (4 connectors previously disconnected from the
dashboard control module). Connectors are numbered on both harnesses (C140, C479, C539 &
C540).
NOTE
The interface harness DB9 connector is used for diagnosis purposes. This
connector is not connected under normal use (secure with cable ties near the
relays).
8. Install the new supplied 870008 dash control module in the dash.
-
Pass the interface harness A15 connector through the control module dash opening.
-
Connect the A15 connector at the back of the new control module.
-
Insert the new module in the opening (make sure the screw at the back of the module is inserted
in the dash bracket.
-
Secure the module to the bracket using the supplied 5001480 nut.
Writer: mg
IS-19923
Page 6 / 12
9. Remove both step well service panels (X-Series shown).
10. Remove the blower box cover to access the motor(s) and blower drive module (MCC motor drive
assembly).
NOTE
Blower may be equipped with a single or dual motor(S) setup (dual shown).
Writer: mg
IS-19923
Page 7 / 12
11. Disconnect the blower drive module from the motor connector.
12. Remove the blower drive mounting plate from the blower box (remove two lower screws then lift).
13. Remove the blower drive module from the mounting plate.
Writer: mg
IS-19923
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14. Disconnect the remaining three connectors and discard the blower drive module.
15. Remove (drill) the three rivets from the mounting plate.
16. Mount the new blower drive module 871353 to the plate using supplied 5001374 screws and 5001449
nuts (make sure the grommet fits properly in the plate U-shaped slot).
Writer: mg
IS-19923
Page 9 / 12
17. Reinstall the blower drive module and mounting plate.
18. Connect the drive module to the motor(s). For single motor blower, dual to single motor wiring adapter 0600037 is required.
19. Depending on the blower configuration, connect the module other ends to the single 0600038 or dual
0600039 motor drive harness (dual shown).
Writer: mg
IS-19923
Page 10 / 12
20. Connect the drive harness to the connectors previously disconnected (dual motors shown) from the
old blower drive module.
21. Remove the outside air temperature sensor from the vehicle (X-Series shown, H-Series may differ
slightly).
-
Open the vehicle front compartment and flip open the front bumper.
-
Locate the outside air temperature sensor and harness.
-
Disconnect the harness and cut the cable ties securing it to the chassis.
-
Remove (cut with a sharp blade) the adhesive holding the sensor to the vehicle structure.
-
Remove (pull out) the sensor.
Writer: mg
IS-19923
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22. Install the new supplied 563335 outside air temperature sensor.
-
Re-drill the sensor opening to 5/8” (+/-16mm).
-
Click (insert from the inside) the new outside air temperature sensor in the drilled opening.
-
Connect the supplied 0600036 harness to the outside air temperature sensor.
-
Connect the sensor harness to the vehicle harness and secure to the structure using some of the
supplied cable ties (follow original harness routing).
-
Inside the compartment, seal the sensor to the vehicle structure using black Simson ISR 70-03.
Writer: mg
IS-19923
Page 12 / 12
23. Reconnect the vehicle power supply and start the vehicle. Check that all HVAC functions are working
properly.
24. Reinstall the blower box cover, the two service panels and the dashboard cover.
PARTS / WASTE DISPOSAL
Discard waste according to applicable environmental regulations (Municipal/State[Prov.]/ Federal)
Writer: mg
0
A
1
RES1D
RES1D:1
RES1D:2
2
3
4
A15
XS0012
DBH
DBH
DBL
DBL
12V
XS0011
GND
114A
A
A15:1
A15:2
A15:3
A15:4
A15:5
C 479
HVAC_2:0 C
HVAC_2:1 C
HVAC_2:0 C
HVAC_2:1 C
A15:6
HVAC_2:0 C
135B
GND
C479:1
C479:2
C479:3
XS0003
C 140
C140:2
C140:3
C140:4
181B
181D
GND
HVAC_2:0 C
HVAC_2:0 D
12V
XS0002
12V
XS0001
GND
HVAC_2:2 C
HVAC_2:2 A
C140:1
B
HVAC_2:1 E
HVAC_2:1 A
HVAC_2:2 C
HVAC_2:4 B
HVAC_2:2 A
B
C
C539
C540
C540:1
HVAC_2:0 C
HVAC_2:0 B
C539:1
C539:2
C539:3
C539:4
64
C539:7
C539:8
C539:9
HVAC_2:0 C
GND
44C
264
C540:2
57E
C540:3
C540:4
GND
GND
C539:5
C539:6
C540:5
XS0004
C540:6
C540:7
XS0005
HVAC_2:0 A
C540:8
44C
HVAC_2:4 C
HVAC_2:4 C
12V
2H
C540:9
2L
C540:10
12V
C540:11
C539:10
D
C539:11
C539:12
C540:12
65A
65
HVAC_2:2 A
HVAC_2:2 C
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TSB/Document ID: IS-19923A
Replacement Service Bulletin Number:
MFR Communication Date: 2020-01-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:ELECTRICAL
MFR Component System:
MFR Component Subsystem:
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