1A-100 Engine Control System (4HK1)
5
Connect a 3-amp fused jumper wire between the
12 volts reference circuit and the signal circuit (pins
1 and 3 of J-38).
Is the MAF Sensor parameter more than the
specified value?
4.9 volts
Go to Step 8 Go to Step 7
6
1. Test the 12 volts reference circuit between the
ECM (pin 23 of J-14) and the MAF sensor (pin
1 of J-38) 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
69 of J-14) and the MAF sensor (pin 3 of J-38)
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
MAF sensor (pins 1 and 3 of J-38).
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 23 and 69 of J-14).
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 MAF sensor. Refer to MAF/IAT 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
—
12
1. Reconnect all previously disconnected
harness connector(s).
2. Clear the DTCs with a scan tool.
3. Turn OFF the ignition for 30 seconds.
4. Start the engine.
5. Operate the vehicle within the Conditions for
Running the DTC. You may also operate the
vehicle within the conditions that you
observed from the Freeze Frame/ Failure
Records.
Did the DTC fail this ignition?
—
Go to Step 3 Go to Step 13
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 100 ページ ２００７年１１月２９日 木曜日 午後６時２９分
To Next Page
Loading...