1A-88 Engine Control System (4HK1)
5
1. Turn OFF the ignition.
2. Disconnect the FRP regulator harness
connector.
3. Connect a test lamp between the high side
circuit (pin 1 of E-17) and a known good
ground.
4. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?
—
Go to Step 6 Go to Step 9
6
1. Turn OFF the ignition.
2. Connect a test lamp between the low side
circuit (pin 2 of E-17) and battery voltage.
3. Turn ON the ignition, with the engine OFF.
Does the test lamp illuminate?
—
Go to Step 11 Go to Step 10
7
1. Test the high side circuits between the ECM
(pins 105 and 113 of E-12) and the FRP
regulator (pin 1 of E-17) 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
8
1. Test the low side circuits between the ECM
(pins 89 and 97 of E-12) and the FRP
regulator (pin 2 of E-17) for a short to ground.
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15 Go to Step 14
9
1. Test the high side circuits between the ECM
(pins 105 and 113 of E-12) and the FRP
regulator (pin 1 of E-17) for the following
conditions:
• An open circuit
• A short to ground
• A short to the low side circuit
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15 Go to Step 12
10
Important: The ECM may be damaged if the FRP
regulator low side circuit is shorted to a voltage
source.
1. Test the low side circuits between the ECM
(pins 89 and 97 of E-12) and the FRP
regulator (pin 2 of E-17) for the following
conditions:
• An open circuit
• A short to battery or ignition voltage
• High resistance
2. Repair the circuit(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15 Go to Step 12
11
1. Inspect for an intermittent and for poor
connections at the harness connector of the
FRP regulator (pins 1 and 2 of E-17).
2. Repair the connection(s) as necessary.
Did you find and correct the condition?
—
Go to Step 15 Go to Step 13
Step Action Value(s) Yes No
LG4HKED-WE-0871.book 88 ページ ２００７年１１月２９日 木曜日 午後６時２９分
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