ECO mode INFINITI QX56 2006 Factory Workshop Manual

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONAT-157
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DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTIONPFP:31940
DescriptionECS00CIZ

Low coast brake solenoid valve is turned “ON” or “OFF ” by the TCM in response to signals sent from the
PNP switch, vehicle speed sensor and accelerator pedal position sensor (throttle position sensor). Gears
will then be shifted to the optimum position.

This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical mal-
function such as control valve sticking, improper solenoid valve operation.
CONSULT-II Reference ValueECS00CJ0
On Board Diagnosis LogicECS00CJ1

This is an OBD-II self-diagnostic item.

Diagnostic trouble code “P1774 LC/B SOLENOID FNCT ” with CONSULT-II is detected under the following
conditions.
–When TCM detects that actual gear ratio is irregular, and relation between gear position and condition of
ATF pressure switch 2 is irregular during depressing accelerator pedal. (Other than during shift change)
–When TCM detects that relation between gear position and condition of ATF pressure switch 2 is irregular
during releasing accelerator pedal. (Other than during shift change)
Possible CauseECS00CJ2

Harness or connectors
(The solenoid and switch circuits are open or shorted.)

Low coast brake solenoid valve

ATF pressure switch 2
DTC Confirmation ProcedureECS00CJ3
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
Selector lever: “1” or “2” position
Gear position: “1st” or “2nd” gear (LC/B ON/OFF)
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3 ” again.
5. Check “SELF-DIAG RESULTS ” mode for “A/T” with CONSULT-
II. If DTC (P1774) is detected, refer to AT- 1 5 8 , "
Diagnostic Pro-
cedure" .
If DTC (P1772) is detected, go to AT- 1 5 6 , "
Diagnostic Proce-
dure" .
WITH GST
Follow the procedure “With CONSULT-II”.
Item name Condition Display value
ON OFF SOL Low coast brake engaged. Refer to
AT- 2 0
.ON
Low coast brake disengaged. Refer to AT- 2 0
.OFF
ATF PRES SW 2 Low coast brake engaged. Refer to
AT- 2 0
.ON
Low coast brake disengaged. Refer to AT- 2 0
.OFF
BCIA0030E

DTC P1841 ATF PRESSURE SWITCH 1AT-159
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DTC P1841 ATF PRESSURE SWITCH 1PFP:25240
DescriptionECS00CJ5
Fail-safe function to detect front brake clutch solenoid valve condition.
CONSULT-II Reference ValueECS00CJ6
On Board Diagnosis LogicECS00CJ7

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1841 ATF PRES SW 1/CIRC ” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 1
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseECS00CJ8

ATF pressure switch 1

Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation ProcedureECS00CJ9
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd
4th Gear (FR/B ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3 ” again.
5. Check “SELF-DIAG RESULTS ” mode for “A/T” with CONSULT-
II.
If DTC (P1841) is detected, go to AT- 1 6 0 , "
Diagnostic Procedure" .
If DTC (P1757) is detected, go to AT- 1 4 4 , "
Diagnostic Procedure" .
Item nameCondition Display value
ATF PRES SW 1 Front brake engaged. Refer to
AT- 2 0
.ON
Front brake disengaged. Refer to AT- 2 0
.OFF
BCIA0030E

DTC P1843 ATF PRESSURE SWITCH 3AT-161
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DTC P1843 ATF PRESSURE SWITCH 3PFP:25240
DescriptionECS00CJB
Fail-safe function to detect input clutch solenoid valve condition.
CONSULT-II Reference ValueECS00CJC
On Board Diagnosis LogicECS00CJD

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1843 ATF PRES SW 3/CIRC ” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 3
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseECS00CJE

ATF pressure switch 3

Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation ProcedureECS00CJF
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 3rd
4th Gear (I/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3 ” again.
5. Check “SELF-DIAG RESULTS ” mode for “A/T” with CONSULT-
II.
If DTC (P1843) is detected, go to AT- 1 6 2 , "
Diagnostic Procedure" .
If DTC (P1752) is detected, go to AT- 1 4 0 , "
Diagnostic Procedure" .
Item nameCondition Display value
ATF PRES SW 3 Input clutch engaged. Refer to
AT- 2 0
.ON
Input clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0030E

DTC P1845 ATF PRESSURE SWITCH 5AT-163
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DTC P1845 ATF PRESSURE SWITCH 5PFP:25240
DescriptionECS00CJH
Fail-safe function to detect direct clutch solenoid valve condition.
CONSULT-II Reference ValueECS00CJI
On Board Diagnosis LogicECS00CJJ

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1845 ATF PRES SW 5/CIRC ” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 5
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseECS00CJK

ATF pressure switch 5

Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation ProcedureECS00CJL
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 1st
2nd Gear (D/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3 ” again.
5. Check “SELF-DIAG RESULTS ” mode for “A/T” with CONSULT-
II.
If DTC (P1845) is detected, go to AT- 1 6 4 , "
Diagnostic Procedure" .
If DTC (P1762) is detected, go to AT- 1 4 8 , "
Diagnostic Procedure" .
Item nameCondition Display value
ATF PRES SW 5 Direct clutch engaged. Refer to
AT- 2 0
.ON
Direct clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0030E

DTC P1846 ATF PRESSURE SWITCH 6AT-165
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Revision: November 2009 2006 QX56
DTC P1846 ATF PRESSURE SWITCH 6PFP:25240
DescriptionECS00CJN
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference ValueECS00CJO
On Board Diagnosis LogicECS00CJP

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “P1846 ATF PRES SW 6/CIRC ” with CONSULT-II is detected when TCM detects
that actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6
is irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseECS00CJQ

ATF pressure switch 6

Harness or connectors
(The switch circuit is open or shorted.)
DTC Confirmation ProcedureECS00CJR
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions. ACCELE POS: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd
3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3 ” again.
5. Check “SELF-DIAG RESULTS ” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to AT- 1 6 6 , "
Diagnostic Procedure" .
If DTC (P1767) is detected, go to AT- 1 5 2 , "
Diagnostic Procedure" .
Item nameCondition Display value
ATF PRES SW 6 High and low reverse clutch engaged. Refer to
AT- 2 0
.ON
High and low reverse clutch disengaged. Refer to AT- 2 0
.OFF
BCIA0030E

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-179
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TCM terminals and data are reference value. Measured between each terminal and ground.
A/T CHECK Indicator Lamp Does Not Come OnECS00CK3
SYMPTOM:
AT CHECK indicator lamp does not come on for about 2 seconds when turning ignition switch to
“ON”.
DIAGNOSTIC PROCEDURE
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 8 6 , "
SELF-DIAGNOSTIC RESULT MODE" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 9 6 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK A/T CHECK INDICATOR LAMP CIRCUIT
Check the combination meter. Refer to DI-5, "
COMBINATION METERS" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 6 7 , "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
Engine Cannot Be Started In “P” or “N” PositionECS00CK4
SYMPTOM:

Engine cannot be started with selector lever in “P” or “N” position.

Engine can be started with selector lever in “D”or “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Perform self-diagnosis. Refer to AT- 8 6 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnosis results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT- 1 0 5 , "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
NO >> GO TO 2.
Terminal Wire
color Item
ConditionData (Approx.)
3 L CAN-H ––
4V K-line (CONSULT-
II signal) The terminal is connected to the data link connector for CONSULT-II
–
7 R Back-up lamp relay Selector lever in "R" position.
0V
Selector lever in other positions. Battery voltage
8 P CAN-L ––

TROUBLE DIAGNOSIS FOR SYMPTOMSAT-205
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7. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. CHECK SYMPTOM
Check again. Refer to AT- 5 6 , "
Cruise Test - Part 1" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 9.
9. PERFORM TCM INSPECTION
1. Perform TCM input/output signals inspection. Refer to AT- 8 3 , "
TCM Input/Output Signal Reference Val-
ues" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.
10. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 1 ,
"Symptom Chart" (Symptom No.24).
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
A/T Does Not Hold Lock-up ConditionECS00CKG
SYMPTOM:
The lock-up condition cannot be maintained for more than 30 seconds.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 8 6 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, CAN communication?
YES >> Check the malfunctioning system. Refer to AT- 11 8 , "DTC P0740 TORQUE CONVERTER
CLUTCH SOLENOID VALVE" , AT- 11 6 , "DTC P0725 ENGINE SPEED SIGNAL" , AT- 1 0 9 , "DTC
P0717 TURBINE REVOLUTION SENSOR" , AT- 9 6 , "DTC U1000 CAN COMMUNICATION LINE"
.
NO >> GO TO 2.

ASSEMBLYAT-307
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31. Install parking gear to output shaft.
32. Install output shaft in transmission case.
CAUTION:
Be careful not to mistake front for rear because both sides
looks similar. (Thinner end is front side.)
33. Install bearing race in output shaft.
34. Install rear extension assembly (2WD models) or adapter case assembly (4WD models) according to the following procedures.
a. 2WD models
i. Apply recommended sealant (Genuine Anaerobic Liquid Gasket or equivalent) to rear extension assembly as shown. Refer to GI-
46, "RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS" .
CAUTION:
Completely remove all moisture, oil and old sealant from
the transmission case and rear extension assembly mating
surfaces.
SCIA5247E
SCIA5030E
SCIA5245E
SCIA5212E

SERVICE DATA AND SPECIFICATIONS (SDS)AT-323
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SERVICE DATA AND SPECIFICATIONS (SDS)PFP:00030
General SpecificationsECS00EQB
*1: Refer to MA-11, "Fluids and Lubricants" .
Vehicle Speed When Shifting GearsECS00EQC
NORMAL MODE

At half throttle, the accelerator opening is 4/8 of the full opening.
TOW MODE

At half throttle, the accelerator opening is 4/8 of the full opening.
Applied model
2WD4WD
Automatic transmission model RE5R05A
Transmission model code number 95X1C95X1D
Stall torque ratio 2.0: 1
Transmission gear ratio 1st
3.827
2nd 2.368
3rd 1.520
4th 1.000
5th 0.834
Reverse 2.613
Recommended fluid NISSAN Matic Fluid J*1
Fluid capacity 10.6 liter (11-1/4 US qt, 9-3/8 Imp qt)
CAUTION:

Use only Genuine NISSAN ATF Matic Fluid J. Do not mix with other fluid.

Using automatic transmission fluid other than Genuine NISSAN ATF Matic Fluid J will deteriorate in driveability and auto-
matic transmission durability, and may damage the automatic transmission, which is not covered by the warranty.
Final
gear
ratio Throttle position Vehicle speed km/h (MPH)
D
1 → D2D2 → D3D3 → D4D4 → D5D5 → D4D4 → D3D3 → D2D2 → D1
2.937 Full throttle
70 - 74
(44 - 46) 112 - 120
(70 - 75) 176 - 186
(110 - 116) 249 - 259
(155 - 161) 245 - 255
(152 - 159) 166 - 176
(103 - 110) 100 - 108
(62 - 67) 43 - 47
(27 - 30)
Half throttle 46 - 50
(28 - 31) 74 - 82
(46 - 51) 103 - 113
(64 - 70) 135 - 145
(84 - 90) 109 - 119
(68 - 74) 69 - 79
(43 - 49) 44 - 52
(27 - 32) 11 - 1 5
(7 - 10)
3.357 Full throttle
61 - 65
(38 - 41) 97 - 105
(61 - 66) 153 - 163
(95 - 102) 236 - 246
(147 - 153) 232 - 242
(144 - 151) 143 - 153
(89 - 95) 87 - 95
(54 - 59) 43 - 47
(27 - 29)
Half throttle 41 - 45
(26 - 28) 66 - 74
(41 - 46) 89 - 99
(56 - 62) 117 - 127
(73 - 79) 95 - 105
(59 - 65) 59 - 69
(37 - 43) 38 - 46
(24 - 29) 11 - 1 5
(7 - 10)
Final
gear
ratio Throttle position Vehicle speed km/h (MPH)
D
1 → D2D2 → D3D3 → D4D4 → D5D5 → D4D4 → D3D3 → D2D2 → D1
2.937 Full throttle
70 - 74
(44 - 46) 112 - 120
(70 - 75) 176 - 186
(110 - 116) 249 - 259
(155 - 161) 245 - 255
(152 - 159) 166 - 176
(103 - 110) 100 - 108
(62 - 67) 43 - 47
(27 - 30)
Half throttle 50 - 54
(31 - 34) 81 - 89
(50 - 55) 113 - 123
(70 - 76) 135 - 145
(84 - 90) 109 - 119
(68 - 74) 68 - 78
(42 - 48) 44 - 52
(27 - 32) 11 - 1 5
(7 - 10)
3.357 Full throttle
61 - 65
(38 - 41) 97 - 105
(61 - 66) 153 - 163
(95 - 102) 236 - 246
(147 - 153) 232 - 242
(144 - 151) 143 - 153
(89 - 95) 87 - 95
(54 - 59) 43 - 47
(27 - 29)
Half throttle 43 - 47
(27 - 29) 72 - 80
(45 - 50) 98 - 108
(61 - 67) 117 - 127
(73 - 79) 95 - 105
(59 - 65) 59 - 69
(37 - 43) 37 - 45
(23 - 28) 11 - 1 5
(7 - 10)

ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 5
Precautions for Working with HFC-134a (R-134a) ..... 5
Contaminated Refrigerant ................................... ..... 5
General Refrigerant Precautions ......................... ..... 6
Precautions for Leak Detection Dye .................... ..... 6
A/C Identification Label ....................................... ..... 6
Precautions for Refrigerant Connection .............. ..... 7
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ................................................. ..... 7
O-RING AND REFRIGERANT CONNECTION ..... 8
Precautions for Servicing Compressor ................ .... 11
Precautions for Service Equipment ..................... .... 11
RECOVERY/RECYCLING EQUIPMENT ......... .... 11
ELECTRONIC LEAK DETECTOR ................... .... 11
VACUUM PUMP .............................................. ... 12
MANIFOLD GAUGE SET ................................. ... 12
SERVICE HOSES ............................................ ... 12
SERVICE COUPLERS ..................................... ... 13
REFRIGERANT WEIGHT SCALE ................... ... 13
CHARGING CYLINDER ................................... ... 13
PREPARATION ...................................................... ... 14
Special Service Tools .......................................... ... 14
HFC-134a (R-134a) Service Tools and Equipment ... 14
Commercial Service Tools ................................... ... 17
REFRIGERATION SYSTEM .................................. ... 18
Refrigerant Cycle ................................................ ... 18
REFRIGERANT FLOW .................................... ... 18
Refrigerant System Protection ............................ ... 18
REFRIGERANT PRESSURE SENSOR .......... ... 18
PRESSURE RELIEF VALVE ............................ ... 19
Component Layout .............................................. ... 20
FRONT REFRIGERATION SYSTEM ............... ... 20
REAR REFRIGERATION SYSTEM ................. ... 21
OIL ......................................................................... ... 22
Maintenance of Oil Quantity in Compressor ....... ... 22
OIL ................................................................... ... 22
CHECKING AND ADJUSTING ........................ ... 22AIR CONDITIONER CONTROL ............................
... 25
Description ........................................................... ... 25
Operation ............................................................. ... 25
AIR MIX DOORS CONTROL ........................... ... 25
BLOWER SPEED CONTROL .......................... ... 25
INTAKE DOOR CONTROL .............................. ... 25
MODE DOOR CONTROL ................................ ... 25
DEFROSTER DOOR CONTROL ..................... ... 25
MAGNET CLUTCH CONTROL ........................ ... 26
SELF-DIAGNOSTIC SYSTEM ......................... ... 26
Description of Control System ............................. ... 27
Control Operation ................................................... 27 DISPLAY SCREEN .............................................. 28
AUTO SWITCH ................................................ ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) (DRIVER SIDE) .................. ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) (PASSENGER SIDE) ......... ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE AND MODE CONTROL) (REAR) .......... ... 28
RECIRCULATION () SWITCH .......................... ... 28
DEFROSTER () SWITCH ................................. ... 28
REAR WINDOW DEFOGGER SWITCH .......... ... 28
OFF SWITCH ................................................... ... 28
A/C SWITCH .................................................... ... 28
MODE SWITCH (FRONT) ................................ ... 28
FRONT BLOWER CONTROL DIAL ................. ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE AND MODE CONTROL) ........................ ... 29
REAR BLOWER CONTROL DIAL ................... ... 29
Discharge Air Flow ................................................. 30 FRONT ............................................................. ... 30
REAR ............................................................... ... 30
System Description (Front) .................................. ... 31
SWITCHES AND THEIR CONTROL FUNCTION ... 31
System Description (Rear) .................................. ... 32
SWITCHES AND THEIR CONTROL FUNCTION ... 32
CAN Communication System Description ........... ... 33
TROUBLE DIAGNOSIS ......................................... ... 34
CONSULT-II Function (HVAC) ............................. ... 34