Code B336, Loss Of IPC Serial Data
This code can only be viewed as a "HISTORY" code because if it was current, service diagnostics could not be entered. Since serial data (7 volts) and ground terminals are redundant, it would take a double open in any of those circuits to set the code. A single intermittent open in circuit No. 343 would also set the code. If codes are intermittent, careful checking of all terminal contacts is required prior to any parts being replaced.
Code B336 indicates an intermittent has occurred. Should intermittent problem persist, check the following circuits for opens or poor terminal contacts.
INTERMITTENT PROBLEM CIRCUIT CHECK
| CIRCUIT | IPC TERMINAL |
|---|---|
| Serial Data | Terminals "RTA" & "RBK" ("C4" & "D4" on Toronado) |
| + 7 Volt | Terminal "RTH" ("C3" & "D3" on Toronado) |
| CPS Power (Ignition Off Terminal) | Terminals "RBA" & "RBB" ("C2"on Toronado) |
| CPS Ground | Terminal "RTG" ("C16" on Toronado) |
If intermittent persists, replace IPC.