Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 1998-2003 Approved FSM 05 abswebdb cic13534
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DI-321
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI6OD-02
DTC 44 NEO Signal Circuit
CIRCUIT DESCRIPTION
The skid contol ECU receives engine revolution speed signals (NEO signal) from the ECM.
DTC No. DTC Detecting Condition Trouble Area
When either of the following 1. or 2. is detected:
1. The vehicle speed is 30 km/h (19 mph) or more, and
open or short condition of the engine revolution signal
S NEO circuit
under the normal communication condition with ECU
44 S ECM
continues for 10 sec. or more.
S Translate ECU
2. While cancel of cruise control is instructed from skid
control ECU, open or short condition of the engine revo-
lution signal continues for 0.24 sec. or more.
WIRING DIAGRAM
ECM Translate ECU
16 13
Y-B
NEO E9 T10 NEO
F09807
2001 SIENNA (RM787U)
Author : Date : 475
DI-322
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
INSPECTION PROCEDURE
1 Check for open and short circuit in harness and connector between terminal
NEO of translate ECU and terminal NEO of ECM (See page IN-31 ).
NG Repair or replace harness and connector.
OK
2 Check voltage between terminal NEO (13) of translate ECU and body ground.
ON
PREPARATION:
Remove the translate ECU with connectors still connected.
NEO
13 CHECK:
(a) Turn the ignition switch ON.
(b) Measure the voltage between terminal 13 of the translate
ECU and body ground under the engine conditions below.
OK:
Engine condition Voltage
F09477
OFF (IG ON) 3 - 6 V or below 1 V
ON (Idling) 3 - 6 V below 1 V (Pulse)
(Reference)
3-6V
Below 1 V
F03007
NG Check and replace ECM.
OK
Check and replace transrate ECU.
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
2001 SIENNA (RM787U)
Author : Date : 476
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