Perkins 1106D Troubleshooting Manual page 148

148
Troubleshooting Section
F. Measure the voltage between P1:16 (keyswitch)
and P1:10 (Battery-).
G. Measure the voltage between P1:40 (keyswitch)
and P1:3 (Battery-).
H. Turn the keyswitch to the OFF position.
Expected Result:
For 12 Volt Systems, the measured voltage is a
constant 11.0 to 13.5 Volts DC with no suspected
intermittent faults at this time.
For 24 Volt Systems, the measured voltage is a
constant 22.0 to 27.0 Volts DC with no suspected
intermittent faults at this time.
Results:
•
OK – The ECM is receiving the correct voltage.
Repair: If an intermittent fault is suspected, refer to
Troubleshooting, "Electrical Connectors - Inspect".
STOP.
•
Not OK - The ECM is not receiving the correct
voltage.
Repair: Check for continuity in the harness for the
keyswitch from P1:40 through the keyswitch circuit
to the batteries. Check the circuit protection for
the circuit.
For intermittent faults such as intermittent
shutdowns that could be caused by the wiring on
the application, temporarily bypassing the wiring
on the application may be an effective means of
determining the root cause.
Proceed to Test Step 5.
•
Not OK - No Voltage on P1: 7, 8, 15, 16 – No
voltage was present on P1: 7, 8, 15, 16.
Repair: Check for continuity in the harness for the
unswitched Battery+ from the ECM to the batteries.
Check the circuit protection for the circuit. Check
for continuity in the harness for the Battery- from
the ECM to the batteries.
Proceed to Test Step 5.
•
Not OK - Battery voltage is out of range – Proceed
to Test Step 4.
Test Step 4. Check the Batteries
A. Load test the batteries. Use a suitable battery
load tester.
This document is printed from SPI². Not for RESALE
Expected Result:
The batteries pass the load test. For 12 Volt systems,
the measured voltage is at least 11.0 Volts DC. For
24 Volt systems, the measured voltage is at least
22.0 Volts DC.
Results:
• OK – The batteries pass the load test. For 12
Volt systems, the measured voltage is at least
11.0 Volts DC. For 24 Volt systems, the measured
voltage is at least 22.0 Volts DC.
Repair: Refer to the service manual for the
application for instructions on troubleshooting
the harness on the application. Troubleshoot the
harness on the application and repair the harness
on the application, as required.
Verify that the repairs eliminate the fault.
STOP.
•
Not OK – The batteries do not pass the load test.
For 12 Volt systems, the measured voltage is
less than 11.0 Volts DC. For 24 Volt systems, the
measured voltage is less than 22.0 Volts DC.
Repair: Recharge or replace the faulty batteries.
Use the electronic service tool in order to clear all
logged diagnostic codes and then verify that the
repair eliminates the fault.
STOP.
Test Step 5. Bypass the Harness on the
Application
Batteries give off flammable fumes which can ex-
plode.
To avoid injury or death, do not strike a match,
cause a spark, or smoke in the vicinity of a battery.
NOTICE
Do not connect the bypass harness to the battery un-
til all of the in-line fuses have been removed from the
Battery+ line. If the fuses are not removed before con-
nection to the battery, a spark may result.
Note: This bypass harness is only for test
applications. This bypass harness must be removed
before the application is released to the customer.
The bypass harness can be used in order to
determine if the cause of the intermittent problem is
interruptions in battery power to the ECM or to the
keyswitch circuit.
KENR6201-01