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Name of code: P−1790(36) - Fault Immediately After Shift When monitored: When a speed ratio error DTC (50 through 55) is stored. Set condition: This code is set if the associated speed ratio code is stored within 1.3 seconds after a Theory of operation: This code will only be stored along with a 50 series code. If this code is set, Transmission Effects: None > Mechanical causes as listed under associated speed ratio code. > Inadequate line pressure > Cut or damaged clutch piston seals Name of code: P−1775(37) - Solenoid Switch Valve Latched in TCC Position When monitored: During an attempted shift into 1st gear. Set condition: This code is set if 6 unsuccessful attempts are made to get into 1st gear, with trans Theory of operation: The solenoid switch valve (SSV) controls the direction of the transmission When shifting into 1st gear, a special hydraulic sequence is performed to ensure SSV movement Transmission Effects: Transmission will have no 1st gear (2nd gear will be substituted), and no Possible causes: > PRNDL indicates a valid OD code in the hydraulic reverse position > Valve body - Solenoid Switch Valve stuck in TCC position > High idle speed > Solenoid malfunction - may also set code P-1784(81) > L-R Pressure Switch Sense circuit shorted to battery > L-R solenoid armature or plunger broken (should also set DTC P1784 (81) and often sets Name of code: P−0740(38) - Torque Converter Clutch Control Circuit When monitored: During Electronically Modu- lated Converter Clutch (EMCC) Operation Set condition: The code will be set if one of the following events happens three times in a given key With the transmission in EMCC, the TCC/L-R b) With the transmission in FEMCC, the TCC Theory of operation: When in 2nd, 2 nd Prime, 3rd, or 4th gear, the torque converter clutch (TCC) Transmission Effects: EMCC will still be avail- able after code is set. MIL will illuminate after 5 Possible causes: > Worn pump bushing and/or failed torque con- verter - both should be replaced during a > Sticky CC Regulator valve. Name of code: P−1776(47) - Solenoid Switch Valve (SSV) Latched in L-R Position When monitored: Continuously when doing partial or full EMCC (PEMCC or FEMCC) Set condition: If the transmission senses the L-R pressure switch closing while performing Theory of operation: The solenoid switch valve (SSV) controls the direction of the transmission When doing PEMCC or FEMCC, the L-R pres- sure switch should indicate no pressure if the SSV 11 GENERAL INFORMATION |