37119-94300 Suzuki Band

Table 1
Diagnostic Trouble Codes for the Data Link Configuration Status
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
625-9 248-9 Proprietary Data Link : Abnormal Update Rate The Electronic Control Module (ECM) detects a loss of communication with the data link.
If equipped, the warning lamp will come on and the code will be logged.
The engine may not start.
625-14 248-14 Proprietary Data Link : Special Instruction The Electronic Control Module (ECM) detects that the data received from the data link is not in the correct format.
If equipped, the warning lamp will come on and the code will be logged.
The engine may not start. The following background information is related to this procedure:The data link is the standard data link that is used by the ECM to communicate with the electronic service tool.The ECM provides multiple connections for the data link. The technician must ensure that the correct connector is being tested. The connection that is used depends on the application.If the diagnostic connector is on the engine, the positive data link signal will be from P2:28 to pin "D" of the diagnostic connector. The negative data link signal will be from P2:20 to pin "E" of the diagnostic connector.If the diagnostic connector is off the engine, the positive data link signal will be from P1:8 to pin "D" of the diagnostic connector. The negative data link signal will be from P1:9 to pin "E" of the diagnostic connector.The following information refers to the pin number. Ensure that the correct connector is used.CommunicationThe electronic service tool may indicate the following error message:The version of the ECM is not recognized and the integrity of the changed parameters and displayed data is not guaranteed.This message will indicate that the version of the software that is in the electronic service tool is obsolete. Install the latest version of the software for the electronic service tool to rectify the fault.
Illustration 1 g06102000
Schematic of the data link for an on-engine diagnostic connector
Illustration 2 g06102006
Schematic of the data link for an off-engine diagnostic connector
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Inspect the connectors in the circuit for the data link.
Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires that are associated with the CAN data link.
D. Check the screw for the P1 and P2 ECM connectors for correct torque of 6 N m (53 lb in).
E. Check all the wiring associated with the data link for abrasions and pinch points.
Damaged wire or connector
Result: A damaged wire or damaged connector was found.
Repair: Repair the damaged wire or the damaged connector.
Use the electronic service tool to clear all logged diagnostic codes. Verify that the repair eliminates the fault.
Result: A damaged wire or damaged connector was not found.
Proceed to Test Step 2.
2. Determine the Type of Fault in the Data Link
A. Connect the electronic service tool to the diagnostic connector that is on the engine harness or on the application.
B. Turn the keyswitch to the ON position.
Power to the comms adapter
Result: The power lamp illuminates on the communications adapter. The communications adapter is receiving the correct voltage.
Proceed to Test Step 5.
Result: The power lamp is not illuminated on the communications adapter. The communications adapter is not currently receiving the correct voltage.
Proceed to Test Step 3.
3. Check the Battery Voltage at the Diagnostic Connector
A. Turn the keyswitch to the ON position.
B. Use a multimeter to measure the voltage from pin A (battery+) and pin B (ground) of the diagnostic connector.
11.0 VDC and 13.5 VDC for a 12 VDC system. 22.0 VDC and 27.0 VDC for a 24 VDC system.
Result: The voltage is between 22.0 VDC and 27.0 VDC for a 24 V system. The voltage is between 11.0 VDC and 13.5 VDC for a 12 V system. The diagnostic connector is receiving the correct voltage.
Proceed to Test Step 5.
Result: The voltage is not between 22.0 VDC and 27.0 VDC for a 24 V system. The voltage is not between 11.0 VDC and 13.5 VDC for a 12 V system. The diagnostic connector is not currently receiving the correct voltage.
Proceed to Test Step 4.
Illustration 3 g06102010
Typical view of the diagnostic connector from the wire side
(A) Switched battery +
(B) Battery ground (GND)
(D) Data link +
(E) Data link -
Table 3
Troubleshooting Test Steps Values Results
4. Bypass the Wiring for the Diagnostic Connector
A. Disconnect the wires from pin A and pin B of the diagnostic connector.
Note: If the diagnostic connector is mounted on the engine, perform steps B to D. If the diagnostic connector is mounted off the engine, perform step E.
B. Disconnect the wires from P2:53 and P2:54.
C. Fabricate a jumper wire to connect pin A of the diagnostic connector to P2:53.
D. Fabricate a jumper wire to connect pin B of the diagnostic connector to P2:54.
E. Fabricate a jumper wire to connect pin "A" of the diagnostic connector to battery+ and pin "B" to the battery-.
F. Connect the electronic service tool to the diagnostic connector that is on the engine harness or on the application.
G. Turn the keyswitch to the ON position. The power lamp should illuminate on the communications adapter.
Other devices are OK
Result: The power lamp is illuminated. The fault is in the harness.
Repair: Repair the faulty harness or replace the faulty harness.
Use the electronic service tool to clear all logged diagnostic codes and then verify that the repair eliminates the fault.
Result: The power lamp is not illuminated.
Proceed to Test Step 6.
5. Check the Data Link Connections
A. Turn the keyswitch to the OFF position.
B. Disconnect the communications adapter from the diagnostic connector.
C. If the diagnostic connector is installed on the application, disconnect connector P1 from the ECM. Check the resistance between P1:8 and pin "D" on the diagnostic connector. Check the resistance between P1:9 and pin "E" on the diagnostic connector.