Pinpoint Test N: The Circuit Deactivation Ignition Module (CDIM) Does Not Communicate With The Scan Tool

Communications Network

Pinpoint Tests

Pinpoint Test N: The Circuit Deactivation Ignition Module (CDIM) Does Not Communicate With the Scan Tool

Refer to Wiring Diagram Set 13, Power Distribution for schematic and connector information. Diagrams By Number

Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number

Normal Operation

The Circuit Deactivation Ignition Module (CDIM) communicates with the scan tool through the Medium Speed Controller Area Network (MS-CAN).

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- CDIM



PINPOINT TEST N: THE CDIM DOES NOT COMMUNICATE WITH THE SCAN TOOL

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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N1 CHECK THE CDIM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN


- Ignition OFF.
- Disconnect: CDIM C2500.
- Ignition ON.
- Measure the voltage between the CDIM C2500-7, circuit SBP27 (BU/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to N2.

No
VERIFY the Smart Junction Box (SJB) fuse 27 (20A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. CLEAR the DTCs. REPEAT the network test with the scan tool. Diagrams By Number

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N2 CHECK THE CDIM GROUND CIRCUIT FOR AN OPEN


- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the CDIM C2500-11, circuit GD133 (BK), harness side and ground.




- Are the resistances less than 5 ohms?

Yes
GO to N3.

No
REPAIR the circuit. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

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N3 CHECK THE MS-CAN CIRCUITS BETWEEN THE CDIM AND THE DLC FOR AN OPEN


- Ignition OFF.
- Measure the resistance between the CDIM C2500-5, circuit VDB06 (GY/OG), harness side and the Data Link Connector (DLC) C251-3, circuit VDB06 (GY/OG), harness side.




- Measure the resistance between the CDIM C2500-12, circuit VDB07 (VT/OG), harness side and the DLC C251-11, circuit VDB07 (VT/OG), harness side.




- Are the resistances less than 5 ohms?

Yes
CONNECT the negative battery cable. GO to N4.

No
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.

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N4 CHECK FOR CORRECT CDIM OPERATION


- Disconnect the CDIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the CDIM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new CDIM. REFER to Steering Column. CLEAR the DTCs. REPEAT the network test with the scan tool. TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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