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Communication System - Non-Dtc Diagnostics: Overview Dodge Dakota III рестайлинг

Communication Devices 3 illustrations ~347 words

Scheme 147

Scheme 147: BOTH DIAGNOSTIC CAN C (+) AND DIAGNOSTIC CAN C (-) CIRCUITS OPEN
Scheme 147: BOTH DIAGNOSTIC CAN C (+) AND DIAGNOSTIC CAN C (-) CIRCUITS OPEN

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS .

  1. When Monitored: When the scan tool queries the Front Control Module (FCM).
  2. Set Condition: The scan tool has detected an open condition on both Diagnostic CAN C circuits.
Possible Causes
(D52) DIAGNOSTIC CAN C (+) CIRCUIT OPEN
(D51) DIAGNOSTIC CAN C (-) CIRCUIT OPEN
FRONT CONTROL MODULE

Scheme 148

Scheme 148: Diagnostic Test
Scheme 148: Diagnostic Test

Scheme 149

Scheme 149
Scheme 149
  1. CHECK THE STATUS OF THE ERROR MESSAGE NOTE: Ensure the vehicle being tested is a CAN BUS VEHICLE. If not, false error messages may be displayed. NOTE: Ensure the scan tool is updated to the latest software. With the scan tool, record the error message. Disconnect the scan tool from the DLC. Cycle the ignition from on to off 3 times. Turn the ignition on. Does the scan tool display this same error message? Yes Go to step 2 No The conditions that caused this error message to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
  2. (D52) DIAGNOSTIC CAN C (+) CIRCUIT OPEN Turn the ignition off. Disconnect the Front Control Module C1 harness connector. Disconnect the scan tool from the DLC. NOTE: Check the connectors at both the DLC and the FCM. Measure the resistance of the (D52) Diagnostic CAN C (+) circuit between the FCM connector and the DLC. Is the resistance below 5.0 ohms? Yes Go to step 3 No Repair the (D52) Diagnostic CAN C (+) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)
  3. (D51) DIAGNOSTIC CAN C (-) CIRCUIT OPEN Measure the resistance of the (D51) Diagnostic CAN C (-) circuit between the FCM connector and the DLC. Is the resistance below 5.0 ohms? Yes Inspect the wiring and connectors for damage or shorted circuits. If OK, replace the Front Control Module in accordance with the Service Information. Perform the BODY VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000) No Repair the (D51) Diagnostic CAN C (-) circuit for an open. Perform the BODY VERIFICATION TEST. Refer to «DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure»(ref-352654-S37713291802010010600000)