YES : Repair a short to ground in the SHB wire between the shift solenoid wire harness and the PCM,
then do the repair verification .
NO : The SHB wire is OK. Go to step 6.
6. Shift solenoid valve B check:
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1. TEST SHIFT SOLENOID VALVE B .
Is shift solenoid valve B OK?
YES : Shift solenoid valve B is OK. REPLACE THE SHIFT SOLENOID WIRE HARNESS , then do
the repair verification .
NO : REPLACE SHIFT SOLENOID VALVE B , then do the repair verification .
REPAIR VERIFICATION (OBD STATUS CHECK)
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1. Reconnect all connectors.
2. Turn the ignition switch to ON (II).
3. Clear the DTC with the HDS.
4. Start the engine with the shift lever in P, and wait for at least 1 second. Test-drive the vehicle through
1st to 3rd gears, then drive in 3rd gear for at least 1 second.
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5. Monitor the OBD STATUS for P0976 in the DTCs MENU with the HDS.
DTC Description
OBD Status
P0976 Shift Solenoid Valve B (Short)
Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
PASSED Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE . Check for other DTC after this troubleshooting. If
any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
FAILED Troubleshooting is incomplete. Check for poor connections or loose terminals between shift solenoid
valve B and the PCM, then go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM
See PCM REMOVAL AND INSTALLATION or PCM UPDATE , and check the OBD STATUS again.
NOT COMPLETED Repair verification is incomplete. Meet the test condition, and check the OBD STATUS
again.
DTC P0977: SHIFT SOLENOID VALVE B (OPEN)
Fig. 96: DTC Troubleshooting Flow Chart (P0977)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
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Before you troubleshoot, record all freeze data and any on-board snapshot
with the HDS, and review the General Troubleshooting Information See
HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW TO
TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο¬
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
P0977 Shift Solenoid Valve B (Open)
1. Problem verification (DTC check):
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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Test-drive the vehicle through 1st to 3rd gears, then drive in 3rd gear for at least 1 second.
4. Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC Pending DTC Freeze Frame
P0977 Shift Solenoid Valve B (Open)
Is DTC P0977 indicated?
YES : The failure is duplicated. Go to step 4.
NO : Go to step 2.
2. Shift solenoid valve B operation check:
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1. Select Shift Solenoid Valve B in the Miscellaneous Test Menu, and test shift solenoid valve B
with the HDS.
Is a clicking sound heard?
YES : The shift solenoid valve B operation is OK. Go to step 3.
NO : Go to step 4.
3. Problem verification (OBD STATUS check):
ο‘
1. Test-drive the vehicle through 1st to 3rd gears, then drive in 3rd gear for at least 1 second.
2. Monitor the OBD STATUS for P0977 in the DTCs MENU with the HDS.
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DTC Description
OBD Status
P0977 Shift Solenoid Valve B (Open)
Does the HDS indicate FAILED?
YES : The failure is duplicated. Go to step 4.
NO : If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals between shift solenoid valve B and the PCM. If the HDS indicates NOT
COMPLETED, test-drive again.
4. Shift solenoid valve B internal resistance check:
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1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connector.
PCM connector B (49P)
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4. Measure the resistance between test points 1 and 2.
Test condition IG LOCK (0)
PCM connector B (49P): disconnected
Test circuit SHB
Test point 1 PCM connector B (49P) No. 32 (WHT)
Test point 2 Body ground
Fig. 97: Measuring Resistance Between PCM Connector B (49P) No. 32 (WHT) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there 13.8-17.1 ohms?
YES : Shift solenoid valve B is OK. Update the PCM if it does not have the latest software See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , or substitute a known-good PCM See
PCM REMOVAL AND INSTALLATION or PCM UPDATE , then do the repair verification .
NO : Go to step 5.
5. Open wire check (SHB line):
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1. Disconnect the following connector.
Shift solenoid wire harness 8P connector
2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
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PCM connector B (49P): disconnected
Shift solenoid wire harness 8P connector: disconnected
Test circuit SHB
Test point 1 Shift solenoid wire harness 8P connector No. 3 (WHT)
Test point 2 PCM connector B (49P) No. 32 (WHT)
Fig. 98: Checking Continuity Between Shift Solenoid Wire Harness 8P Connector No. 3
(WHT) And PCM Connector B (49P) No. 32 (WHT)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The SHB wire is OK. Go to step 6.
NO : Repair an open in the SHB wire between the shift solenoid wire harness and the PCM, then do the
repair verification .
6. Shift solenoid wire harness check:
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1. REMOVE THE SHIFT SOLENOID WIRE HARNESS .
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2. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
PCM connector B (49P): disconnected
Shift solenoid wire harness 8P connector: disconnected
Shift solenoid valve B 1P connector: disconnected
Test circuit SHB
Test point 1 Shift solenoid valve B 1P connector No. 1 (ORN)
Test point 2 Shift solenoid wire harness 7P connector No. 2 (ORN)
Fig. 99: Checking Continuity Between Shift Solenoid Valve B 1P Connector No. 1 (ORN) And
No. 2 (ORN)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The shift solenoid wire harness is OK. REPLACE SHIFT SOLENOID VALVE B , then do the
repair verification .
NO : REPLACE THE SHIFT SOLENOID WIRE HARNESS , then do the repair verification .
REPAIR VERIFICATION (OBD STATUS CHECK)
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1. Reconnect all connectors.
2. Turn the ignition switch to ON (II).
3. Clear the DTC with the HDS.
4. Start the engine with the shift lever in P, and wait for at least 1 second. Test-drive the vehicle through
1st to 3rd gears, then drive in 3rd gear for at least 1 second.
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5. Monitor the OBD STATUS for P0977 in the DTCs MENU with the HDS.
DTC Description
OBD Status
P0977 Shift Solenoid Valve B (Open)
Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
PASSED Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE . Check for other DTC after this troubleshooting. If
any other Pending or Confirmed DTCs were indicated, go to the indicated DTC's troubleshooting.
FAILED Troubleshooting is incomplete. Check for poor connections or loose terminals between shift solenoid
valve B and the PCM, then go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM
See PCM REMOVAL AND INSTALLATION or PCM UPDATE , and check the OBD STATUS again.
NOT COMPLETED Repair verification is incomplete. Meet the test condition, and check the OBD STATUS
again.
DTC P0979: SHIFT SOLENOID VALVE C (SHORT)
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