Page 1383 of 3115
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
Page 1384 of 3115
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.
Page 1385 of 3115
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
Page 1386 of 3115
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
Page 1389 of 3115
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).
Page 1390 of 3115
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
Page 1393 of 3115
A19979
LOCKACC
ON
START
DI-344
- DIAGNOSTICSENGINE
537 Author: Date:
2004 LAND CRUISER (RM1071U)
8 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 and replace harness and connector
between ECM and ignition switch, ignition
switch and battery (See page IN-36).
Page 1398 of 3115
- DIAGNOSTICSENGINE
DI-39
232 Author: Date:
2004 LAND CRUISER (RM1071U)P0171
(DI-147)
System too Lean (Bank 1)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor heater
EFI or ECD relay
PCV piping
ECM
P0172
(DI-147)System too Rich (Bank 1)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 1 sensor 1)
circuit
Heated oxygen sensor (bank 1 sensor 1)
ECM
P0174
(DI-147)System too Lean (Bank 2)
Air induction system
Injector blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage on exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
Heated oxygen sensor heater
EFI or ECD relay
PCV piping
ECM
P0175
(DI-147)System too Rich (Bank 2)
Injector leak, blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in heated oxygen sensor (bank 2 sensor 1)
circuit
Heated oxygen sensor (bank 2 sensor 1)
ECM
P0220
(DI-84)Throttle/Pedal Position Sensor/
Switch ºBº CircuitThrottle control motor and sensor
ECM
P0222
(DI-84)Throttle/Pedal Position Sensor/
Switch ºBº Circuit Low Input
Throttle control motor and sensor
Short in VTA2 circuit
Open in VC circuit
ECM
P0223
(DI-84)Throttle/Pedal Position Sensor/
Switch ºBº Circuit High Input
Throttle control motor and sensor
Open in VTA2 circuit
Open in E2 circuit
VC and VTA2 circuit are short-circuited
ECM
