Pinpoint Test F: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
Communications Network
Pinpoint Test F: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Scan Tool
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number
Refer to Wiring Diagram Set 130, Audio System/Navigation for schematic and connector information. Diagrams By Number
Normal Operation
The Accessory Protocol Interface Module (APIM) communicates with the scan tool and other network modules on the High Speed Controller Area Network (HS-CAN). The APIM does not communicate with the scan tool on the Infotainment Controller Area Network (ICAN).
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- APIM
PINPOINT TEST F: THE APIM DOES NOT RESPOND TO 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, Mounting and Cables Battery Disconnect.
-------------------------------------------------
F1 CHECK THE APIM VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: APIM C2383.
- Ignition ON.
- Measure the voltage between the APIM C2383-1, circuit SBP10 (YE/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to F2.
No
VERIFY the Central Junction Box (CJB) fuse 10 (15A) 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
-------------------------------------------------
F2 CHECK THE APIM GROUND CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the voltage between the APIM, harness side and ground as follows:
- Are the resistances less than 5 ohms?
Yes
GO to F3.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
F3 CHECK THE HS-CAN CIRCUITS BETWEEN THE APIM AND THE DLC FOR AN OPEN
- Measure the resistance between the APIM C2383-53, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
- Measure the resistance between the APIM C2383-54, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Are the resistances less than 5 ohms?
Yes
GO to F4.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
F4 CHECK THE ICAN CIRCUITS BETWEEN THE APIM AND THE DLC FOR AN OPEN
- Measure the resistance between the APIM C2383-16, circuit VDB06 (GY/OG), harness side and the DLC C251-1, circuit VDB06 (GY/OG), harness side.
- Measure the resistance between the APIM C2383-17, circuit VDB07 (VT/OG), harness side and the DLC C251-9, circuit VDB07 (VT/OG), harness side.
- Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to F5.
No
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------
F5 CHECK FOR CORRECT APIM OPERATION
- Disconnect the APIM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the APIM 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 APIM. REFER to Information and Entertainment Systems Accessory Protocol Interface Module (APIM). CLEAR the DTCs. REPEAT the network test with the scan tool.
No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
-------------------------------------------------