MDX V6-3.7L (2007)
Information Bus: Diagnostic Trouble Code Tests and Associated Procedures
B-CAN System Diagnosis Test Mode D
Troubleshooting - B-CAN System Diagnosis Test Mode D
Perform this diagnosis if a component that is controlled by the B-CAN system does not run or come on.
NOTE:
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If the component does not turn off or stop, go to B-CAN System Diagnosis Test Mode C.
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See the B-CAN system unit input/output index for a list of input and output devices and the control units that monitor the input and controls the
output devices.
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Always turn the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this section.
1. Check the fuse of the malfunctioning output device.
Is the fuse OK?
YES - Go to step 2.
NO - Replace the fuse and recheck.
2. Check for DTCs by selecting the TEST MODE menu from the HDS.
Are any DTCs indicated?
YES - Go to B-CAN System Diagnosis Test Mode A.
NO - Go to step 3.
3. Turn ON the switch that controls the malfunctioning component.
4. Select DATA LIST from the TEST MODE menu, and check output signal for the malfunctioning component.
Is there an output signal?
YES - Go to step 5.
NO - Go to step 9.
5. Check the relay and ground, then check for an open or a short in the circuit for the malfunctioning component.
Are the relay and circuit OK?
YES - Go to step 6.
NO - Replace the relay or repair the wire circuit.
6. Perform the function test for the malfunctioning component.
Does the output device pass the function test?
YES - Go to step 7.
NO - Replace the component.
7. With the malfunctioning output device connected, connect a voltmeter between the malfunctioning output device and body ground on the wire that
the control unit uses to control the output device circuit.
8. Select MISC. TEST from the TEST MODE menu, and do the forced operation test of the malfunctioning component.
Is there a change in voltage (12 V to 0 V or 0 V to 12 V)?
YES - Replace the component.
NO - Replace the control unit that controls the malfunctioning component.
9. Select DATA LIST from the TEST MODE menu, and make sure the switch signal input for the malfunctioning system indicates a change when
operated.
