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7A1–34 TRANSMISSION CONTROL SYSTEM (4L30–E) DTC P0706/Flashing Code 74 Transmission Range Switch (Mode Switch) Step Action Yes No 1 Perform the following checks: D The transmission linkage from the select lever to the manual D Diagnostic circuit check. Were the checks performed? Go to Step 2 Refer to Select Lever, and Mode Switch in Automatic Transmission (4L30–E) section 2 1. Install the scan tool. NOTE: Before clearing DTC(s), use the scan tool to record “Failure 3. Record the DTC “Failure Records”. Does each selected transmission range match the scan tool Go to Diagnostic Go to Step 3 3 Are all range switch pin displays incorrect? Go to Step 4 Go to Step 5 4 Check fuse and wiring to the 8–way connector terminal 5(D) for Mode Switch in Automatic Transmission (4L30–E) section. Is the replacement complete? Go to Step 8 — 5 1. Disconnect the 8–way range switch connector. respectively terminals 3(G), 6(C), 7(B) and 8(A) of the 8–way 3. Move shift selector lever through all positions and compare results with “Range Switch Logic Table”. Is one range switch pin display incorrect? Go to Step 6 Go to Step 7 6 Check the affected wiring and connector, and repair. Is the repair complete? Go to Step 8 — 7 Check the Powertrain Control Module (PCM) connectors for poor Is the replacement complete? Go to Step 8 — 8 1. After the repair is complete, use the scan tool to select “DTC”, then “Clear Info” function and road test the vehicle. 2. Review the scan tool “DTC Info”. Has the last test failed or is the current DTC displayed? Begin diagnosis again Go to Step 1 Repair verified |