Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Tundra 2000-2006 Approved 04-06 techinfo.toyota.com ileaf 06toyrm 06toypdf 06rmsrc 06tundra di eg1grfe cicranci
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DI-404
DIAGNOSTICS - ENGINE (1GR-FE)
DIDUD-01
Cranking Holding Function Control Circuit
CIRCUIT DESCRIPTION
The system detects the ignition switch's starting signal (STSW signal) and then supplies current to the starter
until the ECM judges that the engine has started successfully. The purpose is to reduce the holding time of
the ignition key.
EFI ACC CUT
STA Relay Relay
Ignition
STSW
SW
AM2 ACC
ACCR Park/Neutral ST2
Position SW
P
NSW N STA
ACCR NO. 2
Starter
ENG rpm Battery ECM
NSW STSW
STA
A23466
WIRING DIAGRAM
Refer to DTC P0617 on page DI-276.
INSPECTION PROCEDURE
1 Check operation of engine cranking.
CHECK:
When turning the ignition switch to the START position, check whether the starter motor starts.
OK:
Engine is cranked.
OK Check for intermittent problems
(See page DI-11).
NG
DI-405
DIAGNOSTICS - ENGINE (1GR-FE)
2 Connect hand-held tester, and check STA signal.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to ON, and push the hand-held tester main switch ON.
(c) On the hand-held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II / DATA LIST
/ ALL / STARTER SIG.
CHECK:
Read the STA signal on the hand-held tester while the starter operates.
OK:
Standard:
Ignition Switch Position ON START
STARTER SIG OFF ON
NG Repair or replace harness or connector.
OK
3 Check voltage between terminals STSW and STAR/NSW of ECM connector.
(a) Measure the voltage between the terminals of the E6 and
E5 ECM connectors, while cranking the engine (ignition
E6 E5 switch START position).
Standard:
Symbols (Terminal No.) Specified condition
NSW (E6-8) - E1 (E5-1) 9 to 14 V
STSW (E5-12) - E1 (E5-1) 9 to 14 V
NSW (+) STSW (+) E1 (-)
B17411
Result:
Terminal STAR Terminal STSW Proceed to
9 to 14 V 9 to 14 V A
0V 9 to 14 V B
0V 0V C
B Replace ECM (See page SF-66).
C Go to step 8.
A
DI-406
DIAGNOSTICS - ENGINE (1GR-FE)
4 Check park/neutral position switch assembly.
Component Side:
(a) Disconnect the park/neutral position switch connector.
(b) Check for resistance between each terminal shown below
when the shift lever is moved to each range.
Standard:
Shift range Terminal No. Specified condition
1-3
P Below 1
6-9
R 2-3 Below 1
3-5
D14154 N Below 1
6-9
D 3-7 Below 1
3 3-4 Below 1
2, L 3-8 Below 1
NG Check and repair harness and connector.
OK
5 Check starter relay.
(a) Remove the starter relay from the engine room R/B.
(b) Inspect the starter relay.
Standard:
Terminal No. Specified condition
3-5 10 k or higher
Below 1
3-5
(Apply battery voltage terminals 1 and 2)
A19288
NG Replace starter relay.
OK
DI-407
DIAGNOSTICS - ENGINE (1GR-FE)
6 Check harness and connector park/neutral position switch and starter relay.
Wire Harness Side
(a) Check the harness and the connector between the park/
neutral position switch connector and the starter relay.
N1 (1) Disconnect the park/neutral position switch con-
nector.
(2) Remove the starter relay from the engine room R/B.
(3) Check for resistance between the wire harness side
connectors.
Standard (Check for open):
Park/Neutral position switch Connector
A23563 Symbols (Terminal No.) Specified condition
Park/Neutral position switch (N1-6) - Starter relay (1) Below 1
Engine Room R/B: Standard (Check for short):
Symbols (Terminal No.) Specified condition
Park/Neutral position switch (N1-6) or Starter relay (1)
10 k or higher
- Body ground
(b) Check the harness and the connector between the starter
relay and the body ground.
Starter Relay (1) Remove the starter relay from the engine room R/B.
(2) Check for resistance between the starter relay and
the body ground.
Standard (Check for open):
Symbols (Terminal No.) Specified condition
Starter relay (2) - Body ground Below 1
A23461
NG Repair or replace harness or connector.
OK
7 Check starter assembly (See page ST-12 (1.6 kw) or ST-24 (2.0 kw))
NG Replace starter assembly.
OK
DI-408
DIAGNOSTICS - ENGINE (1GR-FE)
8 Check STA fuse.
Engine Room R/B (a) Remove the starter relay from the engine room R/B.
(b) Measure the voltage between the terminal of the engine
room R/B and the body ground.
Standard:
Symbols (Terminal No.) Specified condition
Starter relay (5) - Body ground 9 to 14 V
NG Check for short in all harness and components
Starter Fuse A23469 connected to STA fuse, and replace fuse.
OK
9 Check ignition switch.
ACC AM1
(a) Check for resistance between the connector terminals
IG1 shown in the chart below.
ST1 Standard:
Switch position Terminal No. Specified condition
4 3 2 1
LOCK All terminal to terminal 10 k or higher
ST2 8 7 6 5 ACC 2-3 Below 1
2 - 3, 2 - 4, 3 - 4
ON Below 1
6-7
AM2 IG2
1 - 2, 1 - 4, 2 - 4
A23468 START Below 1
6 - 7, 6 - 8, 7 - 8
NG Replace ignition switch.
OK
Check and repair harness and connector.
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