DTC P0976: Shift Solenoid Valve "B" Circuit Low
NOTE:
- Before you troubleshoot, review the General Troubleshooting Information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
- This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P0976 Shift Solenoid Valve "B" Circuit Low |
- 1. Problem verification:
1. Turn the vehicle to the ON mode.
2. Clear the DTC with the HDS.
3. Start the engine, and warm it up to normal operating temperature (the radiator fan comes on twice).
4. Test-drive the vehicle in D position/mode on a flat road at speeds about 37 mph (60 km/h) for at least 10 seconds.
5. Check for Pending or Confirmed DTCs with the HDS.
DTC Description Confirmed DTC Pending DTC Freeze Frame P0976 Shift Solenoid Valve "B" Circuit Low Is DTC P0976 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals between the shift solenoid valve B and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.
- 2. IG1 FI-ECU line check:
1. Turn the vehicle to the OFF (LOCK) mode.
2. Jump the SCS line with the HDS, and wait more than 1 minute.
3. Disconnect the following connector.
PCM connector A (51P) 4. Turn the vehicle to the ON mode.
5. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode PCM connector A (51P): disconnected Test point 1 PCM connector A (51P) No. 11 Test point 2 Body ground Is there battery voltage?
YES
The IG1 FI-ECU wire is OK. Go to step 3.
NO
Check for a blown No. B7 (7.5 A) fuse in the under-dash fuse/relay box. If the fuse is blown, replace it. If the fuse blows again, repair a short in the No. B7 (7.5 A) fuse circuit. If the fuse is OK, repair an open in the IG1 FI-ECU wire between the PCM and the under-dash fuse/relay box.
- 3. Shift solenoid valve B check:
1. Turn the vehicle to the OFF (LOCK) mode.
2. Jump the SCS line with the HDS, and wait more than 1 minute.
3. Disconnect the following connector.
PCM connector C (51P) 4. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode PCM connector C (51P): disconnected Test point 1 PCM connector C (51P) No. 19 Test point 2 Body ground Is there 10.6-13.5 Ω?
YES
The shift solenoid valve B is OK. Update the PCM if it does not have the latest software , or substitute a known-good PCM , then recheck. If DTC P0976 goes away and the PCM was updated, troubleshooting is complete. If DTC P0976 goes away and the PCM was substituted, replace the original PCM .
NO
Go to step 4.
- 4. Shorted wire check (SOL B line):
1. Disconnect the following connector.
Solenoid wire harness A 8P connector 2. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Solenoid wire harness A 8P connector: disconnected PCM connector C (51P): disconnected Test point 1 PCM connector C (51P) No. 19 Test point 2 Body ground Is there continuity?
YES
Repair a short to body ground in the SOL B wire between the solenoid wire harness A 8P connector and the PCM.
NO
Go to step 5.
- 5. Shift solenoid valve B internal resistance check:
1. Disconnect the following connector.
Shift solenoid valve B 2P connector 2. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Solenoid wire harness A 8P connector: disconnected Shift solenoid valve B 2P connector: disconnected Test point 1 Shift solenoid valve B 2P connector No. 1 Test point 2 Body ground Is there 10.6-13.5 Ω?
YES
Shift solenoid valve B is OK. Repair a short to body ground in the SHB+ wire between the solenoid wire harness A 8P connector and shift solenoid valve B.
NO
Faulty shift solenoid valve B. Replace the lower valve body .
