1A-184 Engine Control System (4HK1)
Circuit/ System Testing DTC P0428
Step
Action
Value(s)
Yes
No
1
Did you perform the Diagnostic System Check
- Engine Controls?
—
Go to Step 2
Go to Diagnostic
System Check -
Engine Controls
2
1.
Install a scan tool.
2.
Turn OFF the ignition for 30 seconds.
3.
Start the engine.
4.
Monitor the DTC Information with a scan tool.
Is DTC P0697 also set?
—
Go to DTC P0697
Go to Step 3
3
1.
Start the engine and fully warm up (allow
engine coolant temperature to reach at least
80
°
C [176
°
F]).
2.
Accelerate the engine between idle and
W.O.T. (accelerator pedal full travel) many
times while observing the Exhaust
Temperature Sensor 1 parameter with a scan
tool.
Is the Exhaust Temperature Sensor 1
parameter more than the specified value?
4.8 volts
Go to Step 4
Go to Diagnostic
Aids
4
1.
Turn OFF the ignition.
2.
Disconnect the exhaust temperature sensor 1
harness connector.
3.
Connect a DMM between the signal circuit
(pin 1 of J-34) and a known good ground.
4.
Turn ON the ignition, with the engine OFF.
Is the DMM voltage more than the specified
value?
5.5 volts
Go to Step 5
Go to Step 6
5
Important:
The exhaust temperature sensor 1 may
be damaged if the sensor signal circuit is shorted to
a voltage source.
1.
Test the signal circuit between the ECM (pin
73 of J-14) and the exhaust temperature
sensor 2 (pin 2 of J-34) for a short to battery or
ignition voltage.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15
Go to Step 14
6
Connect a 3-amp fused jumper wire between the
signal circuit and the low reference circuit (pins 1
and 2 of J-34).
Is the Exhaust Temperature Sensor 1
parameter less than the specified value?
0.1 volts
Go to Step 10
Go to Step 7
7
Connect a 3-amp fused jumper wire between the
signal circuit (pin 2 of J-34) and a known good
ground.
Is the Exhaust Temperature Sensor 1
parameter less than the specified value?
0.1 volts
Go to Step 9
Go to Step 8
LG4HKED-WE-0871.book 184
ページ
２００７年１１月２９日 木曜日 午後６時２９分
