Isuzu Trooper 1999 Workshop Manual page 1481

7A1–28 TRANSMISSION CONTROL SYSTEM (4L30–E)
DTC P0560 System Voltage Malfunction
Step
1 Were you sent here from the "Powertrain On–Board Diagnostic
(OBD) System Check"?
2 1. Install the scan tool.
2. With the engine "off", turn the ignition switch "on".
NOTE: Before clearing DTC(s), use the scan tool to record "Failure
Records" for reference, as data will be lost when the "Clear Info"
function is used.
3. Record the DTC "Failure Records". Note: If any other DTCs
are present, refer to their applicable diagnostic charts before
continuing.
4. Using the J–39200 DVOM, measure the battery voltage
across the battery terminals. Record the measurement for
future reference.
Is the voltage higher than 10.5 volts?
3 Start the engine and warm to normal operating temperature.
Is the generator/check engine light "on"?
4 1. Increase the engine speed to 1,000–1,500 rpm.
2. Observe scan tool system voltage.
Is the system voltage within 13–15 volts.
5 1. Turn the ignition switch "off".
2. Disconnect the J1(RED) and J3 (BLUE) PCM connector
(additional DTCs will set).
3. With the engine "off", turn the ignition switch "on".
4. Using the J39200 DVOM, measure the battery voltage input at
PCM connector terminals J1–A4 and J3–E16.
Is there a voltage variance between the voltage measured at the
battery (taken in Step 2) and at terminals J1–A4 and J3–E16 that
is greater than 0.5 volts?
6 Repair the high resistance condition in circuit WHT.
Was the circuit repaired?
7 1. Disconnect the J3 (BLUE) PCM connector.
2. Measure the ignition voltage input at PCM connector terminals
J3–E16 and J3–F16.
Is there a voltage variance between the voltage measured at the
battery (taken in Step 2) and at terminals J3–E16 and J3–F16 that
is greater than 0.5 volts?
8 Repair the high resistance condition is circuit RED/BLU.
Was the circuit repaired?
9 Check PCM connector terminals J1–A4, J3–E16 and J3–F16 for
bent, damaged, or backed out connector pins. Also check for
weak terminal tension.
Was a problem found?
Action Yes
Go to OBD
System Check
Driveability and
Emissions in
Go to Step 2 Engine section
Go to Engine
Electrical in
Go to Step 3 Engine section
Go to Starting
and Charging
System in Engine
section Go to Step 4
Go to Starting
and Charging
System in Engine
Go to Step 5
Go to Step 6 Go to Step 7
Go to Step 11
Go to Step 8 Go to Step 9
Go to Step 11
Go to Step 11 Go to Step 10
No
Refer to
section
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