1996 TOYOTA LAND CRUISER air conditioning

AC−72
−
AIR CONDITIONING AIR CONDITIONING CONTROL ASSEMBLY
1996 LAND CRUISER (RM451U)
If continuity is not as specified, replace the A/C control assem-
bly.
9. INSPECT A/C OR DEF SWITCH CONTINUITY
Check that there is continuity between terminals B− 6 and B−17
intermittently each time the A/C or DEF switch button pressed.
If continuity is not as specified, replace the A/C control assem-
bly.
10. INSPECT TEMPERATURE CONTROL SWITCH RESIS-
TANCE
(a) Measure resistance between terminals B −1 and B−2.
Standard resistance:
Approx. 3.0 kΩ
(b) Check that the resistance between terminals B −1 and
B−3 increases from 0 to approx. 3.0 k Ω when the switch
knob is turned from COOL to HOT.
If operation is not as specified, replace the A/C control assem-
bly.
e·18·2·B
e-18-2-B
Connector"B"
!Ie7615[ll'O'H(13IU2In
~1817161151(113121111JlIO'Jl
Connector"B"
N06436
N06436
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2SN−01
−
AIR CONDITIONING AIR CONDITIONING CONTROL ASSEMBLY
AC−73
1996 LAND CRUISER (RM451U)
INSTALLATION
Installation is the revese order of removal (See page AC−68 ).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2SI−01
AC−74
−
AIR CONDITIONING AIR CONDITIONING AMPLIFIER
1401
Author: Date:
1996 LAND CRUISER (RM451U)
AIR CONDITIONING AMPLIFIER
ON−VEHICLE INSPECTION
INSPECT AMPLIFIER CIRCUIT
(a) Disconnect the amplifier and inspect the connector on the
wire harness side, as shown in the chart below.
Test conditions:
Ignition switch ON
A/C switch ON
Temperature control lever MAX COOL
Blower control switch HI
Tester connectionConditionSpecifeid condition
6 − GroundConstantContinuity
8 − 9ConstantContinuity
9 − 6ConstantApprox. 1.5 k Ω at 25 ° C (77 °F)
2 − GroundA/C switch ONBattery positive voltage
2 − GroundA/C switch OFFNo voltage
5 − GroundStart engineApprox. 10 to 14 v
5 − GroundStop engineNo voltage
If circuit is as specified, try replacing the amplifier with a new
one. If the circuit is not as specified, inspect the circuits con-
nected to other parts.
(b) Connect the connector to A/C amplifier and inspect wire
harness side connector from the back side, as shown in
the chart below.
Test conditions:
Ignition switch ON
A/C switch ON
Temperature control lever MAX COOL
Blower control switch HI
Tester connectionConditionSpecified Condition
3 − GroundRefrigeration pressure
2.0 − 32 kgf/cm3Battery positive voltage
3 − GroundRefrigeration pressure
less than 2.0 − 32 kgf/cm3 or moreNo voltage
If circuit is not as specified, replace the amplifier.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

N14294
AC2SJ−01
−
AIR CONDITIONING AIR CONDITIONING AMPLIFIER
AC−75
1996 LAND CRUISER (RM451U)
REMOVAL
1. REMOVE GLOVE COMPARTMENT DOOR
(See page BO−76 )
2. REMOVE A/C AMPLIFIER
(a) Disconnect the connector from the amplifier.
(b) Remove the screw and the amplifier.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

AC2SK−01
AC−76
−
AIR CONDITIONING AIR CONDITIONING AMPLIFIER
1996 LAND CRUISER (RM451U)
INSTALLATION
Installation is in the reverse order of removal See page AC−75).
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

Z04536
AC2SO−04
Z15447
−
AIR CONDITIONING REAR HEATER SWITCH
AC−77
1404
Author: Date:
1996 LAND CRUISER (RM451U)
REAR HEATER SWITCH
INSPECTION
1. REMOVE INSTRUMENT CLUSTER FINISH CENTER
PANEL WITH A/C CONTROL ASSEMBLY
2. REMOVE REAR HEATER SWITCH
3. INSPECT INDICATOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
5 and the negative ( −) lead to terminal 1.
(b) Push each of the rear heater switch knob in and check
that their indicators lights up.
If operation is not as specified, replace the switch.
4. INSPECT SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
HI1 − 4Continuity
OFF−No Continuity
LO1 − 2Continuity
Illumination circuit3 − 6Continuity
If continuity is not as specified, replace the switch.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

FI3605
ON
OFF Flashing
0.13 Second
DI−6
−
DIAGNOSTICS ENGINE
1996 LAND CRUISER (RM451U)
NOTICE:
When simulating symptoms with an OBD II scan tool (ex-
cluding TOYOTA hand −held tester) to check the DTC, use
normal mode. For codes on the DTC chart subject to ”2 trip
detection logic”, turn the ignition switch OFF after the
symptom is simulated the first time. Then repeat the simu-
lation process again. When the problem has been simu-
lated twice, the MIL lights up and the DTCs are recorded in
the ECM.
3. INSPECT DIAGNOSIS (CHECK MODE)
HINT:
TOYOTA hand−held tester only:
Compared to the normal mode, the check mode has an in-
creased sensitivity to detect malfunctions.
Furthermore, the same diagnostic items which are detected in
the normal mode can also be detected in the check mode.
(a) Check the DTC. (1) Initial conditions
Battery positive voltage 11 V or more.
Throttle valve fully closed.
Transmission in ”park” or ”neutral” position.
Air conditioning switched OFF.
(2) Turn ignition switch OFF.
(3) Prepare the TOYOTA hand−held tester.
(4) Connect the TOYOTA hand−held tester to DLC3 in
the fuse box at the lower left of the instrument panel.
(5) Turn the ignition switch ON and push the TOYOTA hand−held tester ON.
(6) Switch the TOYOTA hand −held tester normal mode
to check mode (Check that the MIL flashes.).
(7) Switch the engine (The MIL goes out after the en- gine start.).
(8) Simulate the conditions of the malfunction de- scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc. (9) After simulating the malfunction conditions, use theTOYOTA hand−held tester diagnosis selector to
check the DTCs and freezed frame data, etc.
HINT:
Take care not to turn the ignition switch OFF. T urning the ignition
switch OFF switches the diagnosis system from check mode to
normal mode, so all DTCs, etc. are erased.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010

A00149
DLC1
E1
TE1 SST
P09137
P23430
−
DIAGNOSTICS ENGINE
DI−9
1996 LAND CRUISER (RM451U)
OK
5 Check idle speed.
PREPARATION:
(a) Warm up engine to normal operating temperature.
(b) Switch off all accessories.
(c) Switch off air conditioning.
(d) Shift transmission into ”N” position.
(e) Connect the OBD II scan tool or TOYOTA hand−held tester to DLC3 on the vehicle.
CHECK:
Use CURRENT DATA to check the idle speed.
OK:
Idle speed: 650 ± 50 rpm
NG Proceed to matrix chart of problem symptomson page DI−19.
OK
6 Check ignition timing.
PREPARATION:
(a) Warm up engine to normal operating temperature.
(b) Shift transmission into ”N” position.
(c) Keep the engine speed at idle.
(d) Using SST, connect terminals TE1 and E1 of DLC1. SST 09843−18020
(e) Connect a timing light probe to a high −tension cord.
CHECK:
Check ignition timing.
OK:
Ignition timing: 3 ° BTDC at idle
NG Proceed to page IG−1 and continue to trouble-
shoot.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.11 - 03/16/2010