Cranking Holding Function Control Circuit; Check Operation Of Engine Cranking - Toyota Tundra 2005 Service - Repair - Maintenance

DI−404

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.
STSW
ACCR
NSW
ENG rpm
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.
NG
DIAGNOSTICS −
EFI
STA Relay
AM2
Starter
Battery
OK
ENGINE (1GR−FE)
ACC CUT
Relay
Park/Neutral
Position SW
P
N
ACCR
NSW
STA
Check for intermittent problems
(See page DI−11).
Ignition
SW
ACC
ST2
STA
NO. 2
ECM
STSW
DIDUD−01
A23466