TOYOTA LAND CRUISER 1986 Factory Repair Manual

FI7052DepressedReleased
DI-332
- DIAGNOSTICSENGINE
525 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not presentSee ºList of disable a monitorº (on page DI-3)
Either of the following conditions is metA or B
A. Ignition switchON
B. Throttle control motor powerON
System is not under limp home mode due to accelerator pedal position sensor malfunction
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
|VPA - (VPA2 - 0.8)|*
*Corrected by learning valueMore than 0.4 V
WIRING DIAGRAM
Refer to DTC P2120 on page DI-318.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, as well as other data from the time when a malfunction occurred.
Hand-held tester:
1 Connect hand-held tester, and read the voltage for accelerator pedal position
sensor data.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tes-
ter main switch ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED
OBD II / DATA LIST / ETCS / ACCEL POS #1 and ACCEL
POS #2.
CHECK:
Read the voltage for the accelerator pedal position sensor data.
OK:
Accelerator pedalACCEL POS #1ACCEL POS #2
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK Replace ECM (See page SF-60).
NG

A21022
Wire Harness Side:
A14
Accelerator Pedal Position Sensor
EP2
VPA2
VPA1
VCP2VPA1VCP1
A21033
E9
ECM Connector
VPA2
VCPAVPA
EPA2EPA
VCP2
- DIAGNOSTICSENGINE
DI-333
526 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Check for open and short in harness and connector between accelerator pedal
position sensor and ECM.
PREPARATION:
(a) Disconnect the A14 accelerator pedal position sensor
connector.
(b) Disconnect the E9 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard (Check for open):
Tester ConnectionSpecified Condition
VPA1 (A14-5) - VPA (E9-22)Below 1 W
EP1 (A14-3) - EPA (E9-28)Below 1 W
VCP1 (A14-6) - VCPA (E9-26)Below 1 W
VPA2 (A14-2) - VPA2 (E9-23)Below 1 W
EP2 (A14-1) - EPA2 (E9-29)Below 1 W
VCP2 (A14-4) - VCP2 (E9-27)Below 1 W
Standard (Check for short):
Tester ConnectionSpecified Condition
VPA1 (A14-5) or VPA (E9-22) -
Body ground10 kW or higher
EP1 (A14-3) or EPA (E9-28) -
Body ground10 kW or higher
VCP1 (A14-6) or VCPA (E9-26) -
Body ground10 kW or higher
VPA2 (A14-2) or VPA2 (E9-23) -
Body ground10 kW or higher
EP2 (A14-1) or EPA2 (E9-29) -
Body ground10 kW or higher
VCP2 (A14-4) or VCP2 (E9-27) -
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
Replace accelerator pedal pedal assembly.

A21036
E9VPA VPA2
EPA2 EPA
ECM Connector
DI-334
- DIAGNOSTICSENGINE
527 Author
: Date
:
2004 LAND CRUISER (RM1071U)
OBD II scan tool (excluding hand-held tester):
1 Check voltage between terminals VPA and EPA, VPA2 and EPA2 of ECM connec-
tor.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Measure the voltage between the specified terminals of the E9
ECM connector.
OK:
Tester ConnectionTester Connection
Accelerator Pedal PositionVPA (E9-22) -
EPA (E9-28)VPA2 (E9-23) -
EPA2 (E9-29)
Released0.5 to 1.1 V1.2 to 2.0 V
Depressed2.6 to 4.5 V3.4 to 5.3 V
OK Replace ECM (See page SF-60).
NG

A19521A19757
EPA (-)
VCPA (+)
EPA2 (-) VCP2 (+)
Accelerator Pedal
Position Sensor
Connector
E9
A14
- DIAGNOSTICSENGINE
DI-335
528 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Check for open and short in harness and connector between accelerator pedal
position sensor and ECM.
PREPARATION:
(a) Turn the ignition switch ON.
(b) Disconnect the A14 accelerator pedal position sensor
connector.
CHECK:
Measure the voltage between the specified terminals of the E9
ECM connector.
OK:
Tester ConnectionSpecified Condition
VCPA (E9-26) - EPA (E9-28)4.5 to 5.5 V
VCP2 (E9-27) - EPA2 (E9-29)4.5 to 5.5 V
NG Replace ECM (See page SF-60).
OK
Replace accelerator pedal assembly.

A19655A20059
STSW
ACCR
STAR
(NE)
Engine SpeedStarterPark/Neutral
Position SW
N P ST RelayACC Cut
Relay
Ignition
SW
ACC
ST2
ACCR
STSW
STAR BatteryECM
DI-336
- DIAGNOSTICSENGINE
529 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Cranking Hold Function Circuit
CIRCUIT DESCRIPTION
The starter is controlled by the ECM, when the ECM detects a start signal (STSW) from the ignition switch,
this system monitors the engine speed (NE) and continues to operate the starter until it has determined that
the engine has started (engine speed reaches approximately 500 rpm). If the engine is already running and
the ignition switch is turned to START, the ECM will not operate the starter.
WIRING DIAGRAM
Refer to DTC P0617 on page DI-296.
INSPECTION PROCEDURE
Hand-held tester:
1 Check operation of engine cranking.
CHECK:
When turning the ignition switch to the START position, check whether the starter motor starts.
OK:
Starter motor starts.
OK Check for intermittent problems (See page
DI-3).
NG
DIC2U-01

A19522A19630
STAR(+)
E1
E6
ECM Connector(-)
STSW (+)E7
- DIAGNOSTICSENGINE
DI-337
530 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2 Connect hand-held tester, and check STA signal.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON, and push the hand-held tester main switch ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / STARTER SIG.
CHECK:
Read the STA signal on the hand-held tester while the starter operates.
OK:
Ignition Switch PositionONSTART
STA SignalOFFON
NG Go to step 5.
OK
3 Check voltage between terminal STAR, STSW and E1 of ECM connector.
CHECK:
Measure the voltage between the terminals of the E6 and E7
ECM connectors, while cranking the engine (ignition switch
START position).
OK:
Tester ConnectionSpecified Condition
STAR (E6-9) - E1 (E7-1)9 to 14 V
STSW (E7-12) - E1 (E7-1)9 to 14 V
RESULT:
Terminal STARTerminal STSWProceed to
9 to 14 V9 to 14 VA
0 V9 to 14 VB
0 V0 VC
B Replace ECM (See page SF-60).
C Go to step 9.
A

D06601
P1
Component Side:
Park/neutral Position Switch
DI-338
- DIAGNOSTICSENGINE
531 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check park/neutral position switch.
PREPARATION:
Remove the P1 park/neutral position switch connector.
CHECK:
Check continuity between each terminal shown below when the
shift lever is moved to each range.
Shift rangeTerminal No. to continuity
P1 - 36 - 9
R2 - 3-
N3 - 56 - 9
D3 - 7-
23 - 4-
L3 - 8-
OK:
There is continuity.
NG Replace the park/neutral position switch.
OK
Check and repair harness and connector be-
tween park/neutral position switch and ECM
(See page IN-36).
5 Check starter relay (See page ST-18).
NG Replace starter relay.
OK
6 Check for open and short in harness and connector between park/neutral posi-
tion switch and starter relay, starter relay and body ground (See page IN-36).
NG Repair or replace harness or connector.
OK

A21347
Engine Room R/B
Starter Relay
- DIAGNOSTICSENGINE
DI-339
532 Author
: Date
:
2004 LAND CRUISER (RM1071U)
7 Check engine room R/B (Starter relay voltage).
PREPARATION:
Remove the starter relay from the engine room R/B.
CHECK:
Measure the voltage between the terminal of the engine room
R/B and body ground.
OK:
Tester ConnectionSpecified Condition
Starter relay (5) - Body ground9 to 14 V
NG Check and repair harness and connector be-
tween starter relay and battery.
OK
8 Check starter (See page ST-16).
NG Repair or replace starter.
OK

A19979
LOCKACC
ON
START
DI-340
- DIAGNOSTICSENGINE
533 Author
: Date
:
2004 LAND CRUISER (RM1071U)
9 Check ignition switch.
PREPARATION:
(a) Remove the lower finish panel.
(b) Disconnect the ignition switch connector.
CHECK:
Check continuity between terminals shown below.
OK:
Switch PositionTerminal No. to continuity
LOCK--
ACC2-3-
ON2-3-46-7
START1-2-46-7-8
NG Replace ignition switch.
OK
Check for open in harness and connector be-
tween ECM and ignition switch, ignition
switch and battery (See page IN-36).

A19522A19630
STSW(+)
STAR (+)E6
ECM ConnectorE7
E5
STA(+)E1 (-)
- DIAGNOSTICSENGINE
DI-341
534 Author
: Date
:
2004 LAND CRUISER (RM1071U)
OBD II scan tool (excluding hand-held tester):
1 Check operation of engine cranking.
CHECK:
When turning the ignition switch to the ST position, check whether the starter motor starts.
OK Check for intermittent problems (See page
DI-3).
NG
2 Check voltage between terminal STSW, STAR, STA and E1 of ECM connector.
CHECK:
Measure the voltage between the terminals of E5, E6 and E7
ECM connectors, while cranking the engine (ignition switch
START position).
OK:
Tester ConnectionSpecified Condition
STA (E5-17) - E1 (E7-1)9 to 14 V
STAR (E6-9) - E1 (E7-1)9 to 14 V
STSW (E7-12) - E1 (E7-1)9 to 14 V
RESULT:
Terminal STATerminal STARTerminal STSWProceed to
9 to 14 V9 to 14 V9 to 14 VA
0 V9 to 14 V9 to 14 VB
0 V0 V9 to 14 VC
0 V0 V0 VD
B Go to step 7.
C Replace ECM (See page SF-60).
D Go to step 8.
A