Specifications

Symptom:

P0600-CAN DATA BUS - BUS CIRCUIT FAULT

When Monitored and Set Condition:

P0600-CAN DATA BUS - BUS CIRCUIT FAULT

When Monitored: With the ignition on.

Set Condition: The ECM detects an open, short to ground or short to voltage on the CAN

Bus circuit.

POSSIBLE CAUSES

ENGINE CONTROL MODULE

INTERMITTENT CONDITION

CAN BUS COMMUNICATION DTCS

CAN BUS CIRCUITS OPEN TO TCM

TEST ACTION APPLICABILITY

1 NOTE: If the ECM detects and stores a DTC, the ECM also stores the

engine/vehicle operating conditions under which the DTC was set. Some of

these conditions are displayed on the DRB at the same time the DTC is

displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to

duplicate these conditions may assist when checking for an active DTC.

Turn the ignition on.

With the DRBIIIt, erase the ECM DTCs.

Test drive the vehicle.

With the DRBIIIt, read the ECM DTCs.

Did this DTC set again?

All

Yes → Go To 2

No → Go To 4

2 With the DRBIIIt, read theactive andstored DTCs for all modules that useCAN Bus

communication.

NOTE: Due to capabilities of certain controllers that use the CAN Bus, not

all modules report CAN Bus DTCs.

NOTE: If a total CAN Bus failure transpires, there will be multiple CAN Bus

DTCs present in many modules. If the other modules are reporting Engine

CAN Bus message faults or DTC’s related to ECM CAN messages ONLY,

answer No for the following question.

Are other modules reporting active or stored CAN Bus communication DTCs?

All

Yes → Refer to symptom list for problems related to CAN Bus Failure.

Perform BODY VERIFICATION TEST - VER 1.

No → Go To 3

DRIVEABILITY - DIESEL