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 1387 of 3115
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
Page 1388 of 3115
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
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 1391 of 3115
A21347
Engine Room R/B
Starter Relay
DI-342
- DIAGNOSTICSENGINE
535 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check starter relay (See page ST-18).
NG Replace starter relay.
OK
4 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
5 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 (See page
IN-36).
OK
Page 1392 of 3115
D06601
Component Side
Park/neutral Position Switch
P1
- DIAGNOSTICSENGINE
DI-343
536 Author: Date:
2004 LAND CRUISER (RM1071U)
6 Check starter (See page ST-16).
NG Repair or replace starter.
OK
Check and repair harness and connector be-
tween starter relay and starter, starter and
battery (See page IN-36).
7 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).