1A-104 Engine Control System (4HK1)
5
Connect a 3-amp fused jumper wire between the 5
volts reference circuit and the signal circuit (pins 1
and 3 of E-24).
Is the Boost Pressure Sensor parameter more
than the specified value?
4.5 volts
Go to Step 8
Go to Step 7
6
Notice:
The boost pressure sensor shares the 5
volts reference circuit with other sensors. A fault
condition in the 5 volts reference circuit may set
DTCs on sensors that share this circuit.
1.
Test the 5 volts reference circuit between the
ECM (pin 95 of E-12) and the boost pressure
sensor (pin 3 of E-24) for an open circuit or
high resistance.
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12
Go to Step 9
7
1.
Test the signal circuit between the ECM (pin
91 of E-12) and the boost pressure sensor
(pin 1 of E-24) for the following conditions:
• An open circuit
• A short to ground
• A short to the low reference circuit
• High resistance
2.
Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12
Go to Step 9
8
1.
Inspect for an intermittent and for poor
connections at the harness connector of the
boost pressure sensor (pins 1 and 3 of E-24).
2.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12
Go to Step 10
9
1.
Turn OFF the ignition.
2.
Disconnect the ECM harness connector.
3.
Inspect for an intermittent and for poor
connections at the harness connector of the
ECM (pins 91 and 95 of E-12).
4.
Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 12
Go to Step 11
10
Replace the boost pressure sensor. Refer to Boost
Pressure Sensor in Section 1J Induction.
Did you complete the replacement?
—
Go to Step 12
—
11
Important:
Replacement ECM must be
programmed and learned.
Replace the ECM. Refer to ECM Replacement.
Did you complete the replacement?
—
Go to Step 12
—
Step
Action
Value(s)
Yes
No
LG4HKED-WE-0871.book 104
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２００７年１１月２９日 木曜日 午後６時２９分
