DTC P0970: Problem in A/T Clutch Pressure Control Solenoid Valve C Circuit

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

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information (see GENERAL TROUBLESHOOTING INFORMATION ).
This code is caused by an electrical circuit problem and cannot be caused by a mechanical problem in the transmission.
If DTC P0970 is stored in the PCM, the transmission does not shift to any gear other than 1st, 2nd, or 5th gear because of the fail-safe function.

Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
Clear the DTC with the HDS.
Check for Pending or Confirmed DTCs with the HDS.
Is DTC P0970 indicated?

YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Check for poor connections and loose terminals between A/T clutch pressure control solenoid valve C and the PCM.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
Jump the SCS line with the HDS.
Disconnect PCM connector B (49P).
Check for continuity between PCM connector terminal B21 and body ground.

Fig 1: Checking Continuity Between PCM Connector Terminal B21 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 8.

NO - Go to step 10.
Disconnect the A/T clutch pressure control solenoid valve C connector.
Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 1 and body ground.

Fig 2: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair a short to body ground in the wire between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C.

NO - Faulty A/T clutch pressure control solenoid valve C. Replace the secondary valve body (A/T clutch pressure control solenoid valve C) (see SECONDARY VALVE BODY REPLACEMENT ).
Disconnect the A/T clutch pressure control solenoid valve C connector.
Check for continuity between PCM connector terminal B21 and A/T clutch pressure control solenoid valve C connector terminal No. 1.

Fig 3: Checking Continuity Between PCM Connector Terminal B21 And A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 1
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 12.

NO - Repair an open in the wire between A/T clutch pressure control solenoid valve C connector terminal No. 1 and PCM connector terminal B21.
Check for continuity between A/T clutch pressure control solenoid valve C connector terminal No. 2 and body ground.

Fig 4: Checking Continuity Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminal No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 13.

NO - Repair an open in the wire between the A/T clutch pressure control solenoid valve C connector and body ground (G101) (see CONNECTOR TO FUSE/RELAY BOX INDEX ), or repair poor body ground (G101).
Measure the resistance between A/T clutch pressure control solenoid valve C connector terminals No. 1 and No. 2.

Fig 5: Measuring Resistance Between A/T Clutch Pressure Control Solenoid Valve C Connector Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there 4.7-5.9 Ω?

YES - Replace the PCM (see ECM/PCM REPLACEMENT ).

NO - Faulty A/T clutch pressure control solenoid valve C. Replace the secondary valve body (A/T clutch pressure control solenoid valve C) (see SECONDARY VALVE BODY REPLACEMENT ).