Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

OTHER DTCS PRESENT
1. With the scan tool, check DTCs.
  Are there any Pressure Switch Sense circuit DTCs present also?
  
  Yes
  - Refer to appropriate Transmission article and perform the appropriate symptom.
  No
  - Go to step 2
CHECK LC CLUTCH VOLUME INDEX
1. With the scan tool, erase DTCs.
2. Start the engine and warm the transmission.
  NOTE: The TRANS TEMP DEG must be at least 43°C (110°F) before performing the following steps.
3. Drive the vehicle and perform at least ten 3-1 manual downshifts at closed throttle from speeds of about 32 Kmh or 20 MPH.
4. With the scan tool, read the LC CL VOL INDEX.
  Is the LC CL VOL INDEX below 20?
  
  Yes
  - Go to step 3
  No
  - Go to step 5
L/C CLUTCH CIRCUIT LEAKS IN THE VALVE BODY
1. Turn the ignition off to the lock position.
2. Remove the transmission oil pan per the Service Information.
3. Remove the valve body per the service information.
4. Check condition of the LC accumulator springs.
5. Look for possible leak paths into the LC clutch hydraulics circuit within the valve body.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform 62TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Go to step 4
AIR CHECK LC CLUTCH CIRCUITS
1. Perform an air check on the LC Clutch circuit per the Service Information.
2. Watch and listen for LC Clutch piston movement.
  Does the LC piston stroke and return properly?
  
  Yes
  - Replace the Transmission/TRS Solenoid Assembly per the service information. With the scan tool, perform Quick Learn.
  - Perform 62TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Repair internal transmission as necessary. Pay attention to the components related to the LC clutch. A broken or weak LC clutch return spring, Accumulator Spring, and/or dislocated snap ring could cause this problem.
  - Perform 62TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
VERIFY PCM OPERATION
NOTE: The TRANS TEMP DEG must be at least 43°C or 110°F before performing the following steps.
1. Perform eight learnable starts. A learnable start is defined as follows: Start engine. From a standstill, accelerate lightly to 80 Kmh or 50 MPH, then brake lightly to a stop. Turn off engine.
2. With the scan tool, record the CL VOL INDEX (CVI) for all clutches
3. With the scan tool, perform a BATTERY DISCONNECT.
4. With the scan tool, read the CVI's and compare them to the readings recorded before the BATTERY DISCONNECT.
  Are any of the CVI's less than 5 or different than before the BATTERY DISCONNECT?
  
  Yes
  - Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the PCM per the Service Information. With the scan tool, perform QUICK LEARN.
  - Perform 62TE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure
  No
  - Test Complete.