NE signal circuit
Water temp. sensor circuit
Vacuum sensor circuit
Intake air temp. sensor circuit
Throttle position sensor circuit
DTC
13
22
24
31
41
Circuit
P19981
P20001
--
DIAGNOSTICS
ENGINE (1RZ--E)
DI--9
5. CHECK FOR INTERMITTENT PROBLEMS
As previously described , abnormality detection ability in the
test mode is increased compared to that in the normal mode,
so that when intermittent problems occur in the ECU signal cir-
cuits (NE, THW, THA, PIM, VTA) shown in the table opposite,
the appropriate diagnostic trouble code is output.
Accordingly, when the diagnostic trouble codes shown in the
table opposite (13, 22, 24, 31, 41) are output during the diag-
nostic trouble code check, and inspection of the appropriate cir-
cuits reveals no abnormality, check for intermittent problems as
described below.
By check for intermittent problems, the place where intermittent
problems are occurring due to poor contacts can be isolated.
(1)
Clear Diagnostic Trouble Codes
(2)
Set Test Mode
S
With the ignition switch OFF, using SST, con-
nect the terminals TE2 and E1 of the check
connector.
S
Start the engine and check to see if the check
engine warning light to goes off.
(3)
Perform a Simulation Test
Using the symptom simulation
, apply vibration to and pull lightly
on the wire harness, connector or terminals in the
circuit indicated by the malfunction code.
In this test, if the check engine warning light lights
up, it indicates that the place where the wire har-
ness, connector or terminals being pulled or vi-
brated has faulty contact. Check that point for loose
connections, dirt on the terminals, poor fit or other
problems and repair as necessary.
HINT:
After cancelling out the diagnostic trouble code in memory and
set the test mode, if the check engine warning light does not go
off after the engine is started, check thoroughly for faulty con-
tact, etc., then try the check again. If the check engine warning
light still does not go off, check and replace ECU.
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