Page 2497 of 4323
I28358
Radio and Navigation Assy:
REV
R29
± DIAGNOSTICSNAVIGATION SYSTEM
DI±2295
2489 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Inspect radio and navigation assy (REV).
PREPARATION:
Disconnect the radio and navigation assy connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
REV (R29±5) ±
Body groundIgnition switch is on.
Shift lever is moved to R
position.
10 to 14 V
REV (R29±5) ±
Body groundIgnition switch is on.
Shift lever is moved to any
position except R.
Below 1 V
OK Replace radio and navigation assy.
NG
Page 2498 of 4323
I28748
Radio and Navigation Assy:
REV
R29
I28359
Park/Neutral Position Switch
Connector Front View:
P1
DI±2296
± DIAGNOSTICSNAVIGATION SYSTEM
2490 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check harness and connector (Radio and navigation assy ± Park/neutral posi-
tion switch).
PREPARATION:
Disconnect the park/neutral position switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)ConditionSpecified condition
REV (R29±5) ± P1±1AlwaysBelow 1 W
REV (R29±5) ±
Body groundAlways10 kW or higher
NG Repair or replace harness or connector.
OK
Go to back±up light system (See page BE±45).
Page 2499 of 4323

AC2810
DIDKM±01
AC2811
N11084
Wrong Okay
HI LO HILO
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2297
2491 Author: Date:
2005 SEQUOIA (RM1146U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin:
(a) wash the area with lots of cool water.
CAUTION:
Do not rub your eyes or skin.
(b) apply clean petroleum jelly to the skin.
(c) go immediately to a hospital or see a physician for profes-
sional treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER OR APPLY
PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERATION SYS-
TEM
If there is not enough refrigerant in the refrigerant system, oil lu-
brication will be insufficient and compressor burnout may occur.
Necessary care should be taken to avoid this.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATE
Open and close only the low pressure valve. If the high pressure
valves are opened, refrigerant flows in the reverse direction
causing the charging cylinder to rupture.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.
Page 2500 of 4323
DI±2298
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2492 Author: Date:
2005 SEQUOIA (RM1146U)
9. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The SEQUOIA is equipped with an SRS (Supplemental Re-
straint System) such as the driver, passenger, side, curtain
shield airbag. Failure to carry out service operation in the cor-
rect sequence could cause the SRS to unexpectedly deploy
during servicing, possibly leading to a serious accident. Before
servicing (including removal or installation of parts, inspection
or replacement), be sure to read the precautionary notices tn
the RS section.
10. INITIALIZATION
NOTICE:
When disconnecting the battery terminal, initialize the fol-
lowing system after the terminal is reconnected.
System NameSee Page
Back Door Power Window Control Sys-
temBE±77
Page 2501 of 4323
DIDKN±01
I28851
R/B No. 2
Heater Main Relay
(Marking: HTR)
Compressor
Condenser
Receiver Pressure Switch
Integration Panel Assembly
A/C ECU
A/C Switch
Air Inlet Selector
Heater Unit
Heater Radiator
Air Mix Servomotor
Air Outlet Servomotor
Cooling Unit
Blower Motor Linear
Controller
Evaporator
Expansion Valve
ThermistorBlower Unit
Blower Motor
Air Inlet Servomotor
Water Valve
Rear Heater
Control Assembly
Condenser Fan
Ambient
Temperature
Sensor
Solar Sensor
Room
Temperature
Sensor
Rear Room Temperature
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2299
2493 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION
Page 2502 of 4323
I21419
Water Valve
Air Outlet
Servomotor
Heater Radiator
Thermistor
Evaporator
Expansion Valve Power Transistor Blower Motor
DI±2300
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2494 Author: Date:
2005 SEQUOIA (RM1146U)
Page 2503 of 4323
DI3EY±08
Customer Problem Analysis
Check and Clear DTC (Pre±check)
Vehicle Brought to Workshop
Problem Symptom ConfirmationSymptom Simulation Symptom does not
occur
DTC Check
Normal code
DTC ChartProblem Symptoms Table
Circuit InspectionActuator Check
Parts Inspection
Identification of Problem
Repair
Confirmation TestEndItems inside
are titles of pages in this
manual with the page number indicated in the
bottom portion. See the indicated pages
for detailed explanations.
1
2
34
5
67
89
10P. DI±2310
P. IN±24
P. DI±2317
P. DI±2304
P. DI±2319 to DI±2381 P. DI±2310
Malfunction codeP. DI±2302
± DIAGNOSTICSAIR CONDITIONING SYSTEM
DI±2301
2495 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING
Perform troubleshooting in accordance with the procedure on the following page.
Page 2504 of 4323

DI3EZ±06
Inspector 's name:
Customer 's Name
VIN
Production Date
Licence Plate No.
Odometer Readingkm
miles Date vehicle
Brought In / /
Date of Problem Occurrence
How Often does Problem Occur?
Weather
Outdoor Temperature / /
Continuous Intermittent ( times a day)
Fine Cloudy Snowy Various /Other
Hot Warm Cool Cold (Approx.°F
°C)
Symptoms Blower motor does not operate
Blower motor speed does not change
(Always Hi, Always Med, Always Lo)
Air Flow Control is
Faulty
Cabin temperature does not go down
Response is slow
Cannot change between FRS and REC
(Always Fresh or always Recirculating)
Will not enter the desired mode Temperature
Control is Faulty
Air Inlet Control is
Faulty
Vent Control is
Faulty
DTC Check1st Time
2nd Time Normal Code Malfunction Code (Code )
Normal Code Malfunction Code (Code )
AIR CONDITIONING SYSTEM Check Sheet
Cabin temperature does not rise
Mode will not change DI±2302
± DIAGNOSTICSAIR CONDITIONING SYSTEM
2496 Author: Date:
2005 SEQUOIA (RM1146U)
CUSTOMER PROBLEM ANALYSIS CHECK