Hi, code 34 is listed below with the pinpoint test, you will need to do some testing to find thesource of the issue, thanks
The air bag sliding contact shorting bar may be removed to measure the air bag sliding contact resistance. Likewise, the shorting bar(s) in the air bag diagnostic monitor harness connector may be removed by removing the black spacer (locking wedge) from the connector. Use extreme caution when reinstalling the shorting bars to make sure they are installed correctly.
While the ignition switch is in the RUN position, the air bag diagnostic monitor runs periodic checks on the resistance of the driver and passenger air bag circuits. Normal resistance from Pin C1-2, Circuit 614 (GY/O)(driver air bag feed) to Pin C1-3, Circuit 615 (GY/W)(driver air bag return) is between 1.4 ohms and 2.0 ohms.
Low resistance across Pins C1-2, Circuit 614 (GY/O) and C1-3, Circuit 615 (GY/W) can be caused by:
Was DTC B1934 retrieved?
Is the resistance reading 1 MEG ohm or more?
Has a DTC B1934 just been serviced and repaired?
Are any concerns noticed in the wiring or is ohmmeter reading less than 1 ohm?
Is the resistance reading infinite (open)?
Are concerns noticed?
Some vehicles may exhibit a malfunction indicator lamp (MIL) "ON" with or without the following symptoms: Rough Running, Lack of Power, Surge or Poor Fuel Economy, along with diagnostic trouble codes (DTC's) P0401, P0402, P1400 or P1401. This may be caused by an intermittently functioning tube-mounted delta pressure feedback EGR (DPFE) sensor (Figure 1