P0845
DTC P0845: Problem in 3rd Clutch Pressure Switch CircuitNOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.
1. Disconnect the 3rd clutch pressure switch.
2. Turn the ignition switch ON (II).
3. Measure the voltage between PCM connector terminal C10 and body ground.
PCM CONNECTOR C (22P)
Is there about 5 V?
YES - Go to step 4.
NO - Check the terminal fit at PCM connector terminal C10. If the connection is OK, update for short to ground in the wire between PCM connector terminal C10 and the 3rd clutch pressure switch. If wire is OK, reprogram the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/ indication goes away with a known-good PCM, replace the original PCM.
4. Measure the voltage between the 3rd clutch pressure switch connector terminal and body ground.
Is there about 5 V?
YES - Go to step 5.
NO - Repair open in the wire between PCM connector terminal C10 and the 3rd clutch pressure switch.
5. Turn the ignition switch OFF.
6. Measure the resistance between the 3rd clutch pressure switch connector terminal and body ground.
Is there 40 M Ohms or more?
NOTE: An open circuit is greater than 40 M Ohms
YES - Go to step 7.
NO - Replace the 3rd clutch pressure switch.
7. Connect the 3rd clutch pressure switch connector.
8. 4WD model: Raise the vehicle, make sure it is securely supported, and allow all four wheels to rotate freely. 2WD model: Raise the front of the vehicle, make sure it is securely supported, and allow the front wheels to rotate freely.
9. Start the engine. Shift into the D position, then turn the O/D switch off so the transmission cannot upshift beyond 3rd gear.
10. Accelerate the vehicle until the speed exceeds 19 mph (30 km/h), then release the accelerator. Shift into the N position, and return to the D the transmission will shift to 3rd gear.
11. Drive the vehicle in 3rd gear for more than 5 seconds.
12. While driving in 3rd gear, measure the voltage between PCM connector terminal C10 and body ground.
Is there 0 V?
YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM.
NO - Check 3rd clutch pressure. If pressure is in specification, replace the 3rd clutch pressure switch.