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| Illustration 1 | g02798223 |
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| Illustration 2 | g02798224 |
Use the flow chart that is in Illustration 1 and Illustration 2 along with the Step procedure in order to troubleshoot codes CID 0091 FMI 08 and CID 1326 FMI 09.
An abnormal update has occurred. The PCP has lost communications with the ECM.
Troubleshooting:
Test Step 1. CHECK THE ELECTRICAL CONNECTORS, CIRCUIT BREAKERS, AND WIRING.
- Inspect the data link connectors for the PCP, ETP, and the ECM.
- Inspect the battery connections for the PCP, ETP, and the ECM.
- Inspect the circuit breakers in order to verify that the circuit breakers are not tripped.
- Inspect the harnesses for the following conditions:
- Corrosion
- Abrasion
- Pinch points
- Incorrect attachment
- Ensure that all connectors, pins, and sockets are mated completely.
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| Illustration 3 | g03325937 |
Expected Result:
All harnesses are in good condition.
Results:
- OK - All harnesses are in good condition. Go to Test Step 2.
- NOT OK - All harnesses are not in good condition.
Repair: After the repair, verify that the diagnostic code is NOT active.
STOP
Test Step 2. ENSURE THAT THE NUMBER OF TERMINATING RESISTORS IS CORRECT.
- Ensure that there is only one terminating resistor connected to the TEE connector for the ETP.
- Ensure that there is only one terminating resistor connected to the display/J1939 data link. The second terminating resistor should be connected to the TEE connector on the last display.
Expected Result:
The duty cycle is between 7.5 percent ± 2.5 percent at low idle and 93.5 percent ± 2.5 percent at high idle.
Results:
- OK - The duty cycle voltage is between 7.5 percent ± 2.5 percent at low idle and 93.5 percent ± 2.5 percent at high idle.
Repair: Temporarily replace the ECM and retest.
STOP
- NOT OK - The duty cycle IS NOT between 7.5 percent ± 2.5 percent at low idle and 93.5 percent ± 2.5 percent at high idle.
Repair: Temporarily replace the engine harness. Check to ensure the diagnostic code IS NOT active.
STOP
Test Step 3. SHORTEN THE DATA LINK AND RETEST.
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| Illustration 4 | g03325937 |
- Remove the terminating resistor from the last display TEE on the display/J1939 data link.
- Remove the data run to the marine power displays (MPD) at the TEE connector for the power train control processor (PCP).
- Install a terminating resistor at the TEE connector for the PCP. Refer to Illustration 4
Retest in order to determine if the diagnostic code is still active.
- If the diagnostic code remains active continue with this test.
Expected Result:
The diagnostic code becomes logged and the diagnostic code is no longer active.
Results:
- OK - The diagnostic code becomes logged and the diagnostic code is no longer active.
Repair: Reconnect each MPD data link one at a time.
Recheck to see if the diagnostic code becomes active.
If the diagnostic code becomes active, then go to the Diagnostic Functional Tests, "Data Link (Marine Power Display) - Test".
If the diagnostic is NOT active, then this portion of the test is complete.
STOP
- NOT OK - The diagnostic code does not become logged and the diagnostic code remains active. Go to Test Step 4.
Test Step 4. MEASURE THE VOLTAGE AT THE ECM.
| Engine | Measure
from J1/P1 Pin Number |
Circuit
Name |
Measure
to |
Voltage |
| 3196
3406E |
J1-4 | Switched
+Battery |
J1-5 | 24± 3 VDC
or 12± 3 VDC |
| J1-6 | Unswitched
+Battery |
J1-5 | ||
| 3124E
C30 C32 |
J1-23 | Switched
+Battery |
J1-5 | 24± 3 VDC |
| J1-4 | Unswitched
+Battery |
J1-5 | ||
| J1-6 | Unswitched
+Battery |
J1-11 | ||
| C9
C12 C15 C18 3126B |
J1-70 | Switched
+Battery |
J1-61 | 24± 3 VDC
12± 3 VDC |
| J1-48 | Unswitched
+Battery |
J1-61 | ||
| J1-52 | Unswitched
+Battery |
J1-63 | ||
| J1-53 | Unswitched
+Battery |
J1-65 |
- Turn the keyswitch OFF.
- Disconnect the J1 connector to the ECM.
- Turn the keyswitch ON.
- Use a digital volt meter (DVM) in order to measure the voltage between the +battery and -battery pins. Refer to Table 1 for the pin numbers. Wiggle the harness in order to reveal an intermittent condition.
Expected Result:
The voltage is between 22 VDC and 27 VDC for a 24 VDC system. The voltage is between 11 VDC and 14 VDC for a 12 VDC system.
Results:
- OK - The voltage is correct. Go to Test Step 7.
- NOT OK - The voltage is not correct. Go to Test Step 5.
Test Step 5. MEASURE THE VOLTAGE AT THE J3 CUSTOMER CONNECTOR.
| Measure from
J3 Customer Connector Pin Number |
Circuit Name | Measure to
J3 Pin Number |
Circuit Name |
| 1 | Unswitched
+Battery |
2 | -Battery |
| 5 | Unswitched
+Battery |
3 | -Battery |
| 8 | Unswitched
+Battery |
9 | -Battery |
| 30 | Keyswitch | 9 | -Battery |
- Turn the keyswitch OFF.
- Disconnect the J3 connector from the P3 connector.
- Turn the keyswitch ON.
- Use a DVM in order to measure the voltage between +battery and -battery pins on the J3 connector. Refer to Table 2 for the pin numbers. Wiggle the harness in order to reveal an intermittent condition.
Expected Result:
The voltage should be between 22 VDC and 27 VDC for a 24 VDC system and 11 VDC to 14 VDC for a 12 VDC system
Results:
- OK - The voltages are correct.
Repair: Replace the engine harness.
After the repair, verify that the diagnostic code is NOT active.
STOP
- NOT OK - The voltage IS NOT correct. Go to Test Step 6.
Test Step 6. MEASURE THE VOLTAGE AT THE MJB J3/ECM CONNECTOR.
| Measure from MJB
J3/ECM Connector Pin Number |
Circuit Name | Measure to MJB
J3/ECM Connector |
Circuit Name |
| 1 | Unswitched
+Battery |
2 | -Battery |
| 5 | Unswitched
+Battery |
3 | -Battery |
| 8 | Unswitched
+Battery |
9 | -Battery |
| 30 | Keyswitch | 9 | -Battery |
- Turn the keyswitch OFF.
- Disconnect the J3/P3 harness from the MJB.
- Turn the keyswitch ON.
- Use a DVM in order to measure the voltage between pins +Battery and -Battery on the PCP J3/ECM connector. Refer to Table 3 for the pin numbers. Wiggle the harness during measurement in order to reveal an intermittent condition.
Expected Result:
The voltage should be between 22 VDC and 27 VDC for a 24 VDC system and 11 VDC to 14 VDC for a 12 VDC system.
Results:
- OK - The voltage is correct.
Repair: Replace the MJB to J3/ECM harness.
After the repair, verify that the diagnostic code is NOT active.
STOP
- NOT OK - The voltage IS NOT correct. There is a problem in the charging circuit.
Repair: Go to the Special Instruction, REHS0354, "Charging System Troubleshooting".
STOP
Test Step 7. MEASURE THE RESISTANCE OF THE DATA LINK IN THE ENGINE HARNESS (SHORT CIRCUIT TEST).
| Measure from
P3 Pin Number |
Circuit Name | Measure to | Circuit Name |
| P3-17 | CAN + | P3-30 | Keyswitch |
| P3-17 | CAN + | P3-1 | Unswitched
+Battery |
| P3-17 | CAN + | P3-2 | -Battery |
| P3-17 | CAN + | P3-16 | CAN shield |
| P3-18 | CAN - | P3-30 | Keyswitch |
| P3-18 | CAN - | P3-1 | Unswitched
+Battery |
| P3-18 | CAN - | P3-2 | -Battery |
| P3-18 | CAN - | P3-16 | CAN shield |
- Turn the keyswitch OFF.
- Disconnect the J3 connector from the P3 connector.
- Disconnect the ETP and the terminating resistor harness from the engine harness.
- Use a DVM and measure the resistance between pins P3-17 and P3-18. Wiggle the harness to reveal an intermittent condition.
- Continue testing the pin combinations. Refer to Table 4.
Expected Result:
The resistance is greater than 20000 Ohms.
Results:
- OK - The resistance is greater than 20000 Ohms. Go to Test Step 8.
- NOT OK - The resistance is less than 20000 Ohms.
Repair: Temporarily replace the engine harness.
After the repair, verify that the diagnostic code is NOT active.
STOP
Test Step 8. MEASURE THE RESISTANCE OF THE DATA LINK IN THE ENGINE HARNESS (OPEN CIRCUIT TEST).
- Turn the keyswitch OFF.
- Disconnect the J3 connector from the P3 connector.
- Install a jumper between P3-17 and P3-18 on the engine harness.
- Disconnect the ETP cable and the terminating resistor from the 6-pin connector on the engine harness.
- Use a DVM in order to measure the resistance between pins J3-17 and J3-18 on the engine harness. Wiggle the harness during the measurement in order to reveal an intermittent condition.
Expected Result:
The resistance is less than 20 Ohms.
Results:
- OK - The resistance is less than 20 Ohms.
Repair: Temporarily replace the ECM.
After the repair, verify that the diagnostic code is NOT active.
STOP
- NOT OK - The resistance is greater than 20 Ohms.
Repair: Replace the engine harness.
After the repair, verify that the diagnostic code is NOT active.
STOP