AF1-AF25
Communications Network
Pinpoint Test AF: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. Diagrams By Number
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- 4X4 control module (if equipped)
- ABS module
- Accessory Protocol Interface Module (APIM) (if equipped)
- Cruise-Control Module (C-CM) (if equipped)
- Headlamp Control Module (HCM) (if equipped)
- Head Up Display (HUD) module (if equipped)
- Instrument Panel Cluster (IPC) (gateway module)
- Occupant Classification System Module (OCSM)
- Parking Aid Module (PAM) (if equipped)
- PCM
- Power Steering Control Module (PSCM) (part of the steering gear)
- Remote Function Actuator (RFA) module (if equipped)
- Restraints Control Module (RCM)
- Steering Angle Sensor Module (SASM) (if equipped)
PINPOINT TEST AF: NO HS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test. Inspection And Verification
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery, Mounting and Cables Battery Disconnect.
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AF1 CHECK THE DLC PINS FOR DAMAGE
- Ignition OFF.
- Disconnect the scan tool cable from the Data Link Connector (DLC).
- Inspect DLC pins 6 and 14 for damage.
- Are DLC pins 6 and 14 OK?
Yes
GO to AF2.
No
REPAIR the DLC as necessary. CLEAR the DTCs. REPEAT the network test with the scan tool.
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AF2 CHECK THE HS-CAN TERMINATION RESISTANCE
- Ignition OFF.
- Disconnect: Negative Battery Cable .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance between 54 and 66 ohms?
Yes
GO to AF3.
No
GO to AF5.
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AF3 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.
- Are the resistances greater than 1,000 ohms?
Yes
GO to AF4.
No
GO to AF27.
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AF4 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO VOLTAGE
- Connect: Negative Battery Cable .
- Ignition ON.
- Measure the voltage between the DLC C251-6, circuit VDB04 (WH/BU), harness side and ground; and between the DLC C251-14, circuit VDB05 (WH), harness side and ground.
- Are the voltages greater than 6 volts?
Yes
REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
The HS-CAN has tested within specifications. GO to Pinpoint Test AA to diagnose an intermittent HS-CAN fault. Pinpoint Tests AA: The RETM Does Not Respond To The Scan Tool
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AF5 CHECK THE HS-CAN TERMINATION RESISTOR
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance between 108 and 132 ohms?
Yes
GO to AF6.
No
GO to AF9.
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AF6 CHECK THE HS-CAN TERMINATION RESISTOR WITH THE PCM DISCONNECTED
- Disconnect: PCM C175b (3.7L) .
- Disconnect: PCM C1381b (3.5L GTDI) .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance between 108 and 132 ohms?
Yes
GO to AF7.
No
GO to AF8.
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AF7 CHECK THE HS-CAN CIRCUITS BETWEEN THE PCM AND THE DLC FOR AN OPEN
- For 3.7L, measure the resistance between the PCM C175b-2, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
- For 3.7L, measure the resistance between the PCM C175b-3, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- For 3.5L GTDI, measure the resistance between the PCM C1381b-59, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
- For 3.5L GTDI, measure the resistance between the PCM C1381b-58, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to AF43.
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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AF8 CHECK THE HS-CAN CIRCUITS BETWEEN THE IPC AND THE DLC FOR AN OPEN
- Disconnect: Instrument Panel Cluster (IPC) C220 .
- Measure the resistance between the IPC C220-25, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
- Measure the resistance between the IPC C220-26, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Are the resistances less than 5 ohms?
Yes
CONNECT the negative battery cable. GO to AF51.
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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AF9 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF11.
No
GO to AF10.
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AF10 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR AN OPEN
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes
REPAIR the circuit in question. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
A capacitor internal to a module may still be draining causing irregular resistance readings. WAIT 5 minutes. REPEAT the pinpoint test.
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AF11 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PCM DISCONNECTED
- Disconnect: PCM C175b (3.7L) .
- Disconnect: PCM C1381b (3.5L GTDI) .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
If the vehicle is equipped with a Parking Aid Module (PAM), GO to AF12.
If the vehicle is not equipped with a PAM, GO to AF13.
No
CONNECT the negative battery cable. GO to AF43.
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AF12 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PAM DISCONNECTED
- Disconnect: PAM C4014 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF13.
No
CONNECT the negative battery cable. GO to AF44.
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AF13 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE ABS MODULE DISCONNECTED
- Disconnect: ABS Module C135 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
If the vehicle is equipped with a 4X4 control module, GO to AF14.
If the vehicle is not equipped with a 4X4 control module, GO to AF15.
No
CONNECT the negative battery cable. GO to AF45.
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AF14 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE 4X4 CONTROL MODULE DISCONNECTED
- Disconnect: 4X4 Control Module C460 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF15.
No
CONNECT the negative battery cable. GO to AF46.
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AF15 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RCM DISCONNECTED
- Disconnect: Restraints Control Module (RCM) C310b .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF16.
No
CONNECT the negative battery cable. GO to AF47.
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AF16 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE RFA MODULE DISCONNECTED
- Disconnect: RFA Module C2153d .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF17.
No
CONNECT the negative battery cable. GO to AF48.
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AF17 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE OCSM DISCONNECTED
- Disconnect: Occupant Classification System Module (OCSM) C3159 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
If the vehicle is equipped with a Cruise-Control Module (C-CM), GO to AF18.
If the vehicle is not equipped with a C-CM, GO to AF19.
No
CONNECT the negative battery cable. GO to AF49.
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AF18 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE C-CM DISCONNECTED
- Disconnect: C-CM C1582 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF19.
No
CONNECT the negative battery cable. GO to AF50.
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AF19 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE IPC DISCONNECTED
- Disconnect: IPC C220 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
If the vehicle is equipped with an Accessory Protocol Interface Module (APIM), GO to AF20.
If the vehicle is not equipped with an APIM, GO to AF21.
No
CONNECT the negative battery cable. GO to AF51.
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AF20 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE APIM DISCONNECTED
- Disconnect: APIM C3342 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF21.
No
CONNECT the negative battery cable. GO to AF52.
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AF21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE PSCM DISCONNECTED
- Disconnect: Power Steering Control Module (PSCM) C1467a .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
If the vehicle is equipped with a Head Up Display (HUD) module, GO to AF22.
If the vehicle is not equipped with a HUD module, GO to AF23.
No
CONNECT the negative battery cable. GO to AF53.
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AF22 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE HUD MODULE DISCONNECTED
- Disconnect: HUD Module C2395 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF23.
No
CONNECT the negative battery cable. GO to AF54.
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AF23 VERIFY VEHICLE EQUIPMENT - SASM
- Inspect the vehicle for a Steering Angle Sensor Module (SASM).
- Is the vehicle equipped with a SASM?
Yes
GO to AF24.
No
GO to AF25.
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AF24 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TOGETHER WITH THE SASM DISCONNECTED
- Disconnect: SASM C2412 .
- Measure the resistance between the DLC C251-6, circuit VDB04 (WH/BU), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AF25.
No
CONNECT the negative battery cable. GO to AF55.
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AF25 VERIFY VEHICLE EQUIPMENT - HCM
- Inspect the vehicle for a Headlamp Control Module (HCM).
- Is the vehicle equipped with a HCM?
Yes
GO to AF26.
No
REPAIR the circuits. CONNECT all modules. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.