Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA2008MDXREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION
2008 Acura MDX
Automatic Transmission
2008 Acura MDXSECTION Automatic Transmission
- Special Tools
- General Troubleshooting Information
- How to Check for DTCs with the Honda Diagnostic System (HDS)
- Symptom Troubleshooting Versus DTC Troubleshooting
- How to Check for DTCs with the SCS Mode (retrieving the flash codes)
- How to Troubleshoot Circuits at the PCM Connectors
- Clear A/T DTCs Procedures
- OBD Status
- How to End a Troubleshooting Session (required after any troubleshooting)
- Substitute the PCM
- DTC Troubleshooting Index
- Symptom Troubleshooting Index
- Component Location Index
- System Description
- General Operation
- Clutches and Gears
- Power Flow
- Electronic Control System
- Electronic Control
- Functional Diagram
- Shift Control
- Shift Control - Grade Logic Control
- Grade Logic Control: Ascending Control
- Grade Logic Control: Descending Control
- Deceleration Control
- Shift-Hold Control
- Shift Control - Sequential Sportshift Mode
- Clutch Pressure Control
- Lock-up Control
- PCM A/T Control System Electrical Connections
- PCM A/T Control System Inputs and Outputs
- Hydraulic Controls
- Hydraulic Flow
- Distribution of Hydraulic Pressure
- N Position
- D and D3 Positions: 1st gear shifting from the N position
- D and D3 Positions: Driving in 1st gear
- D and D3 Positions: Shifting between 1st gear and 2nd gear
- D and D3 Positions: Driving in 2nd gear
- D and D3 Positions: Shifting between 2nd gear and 3rd gear
- D and D3 Positions: Driving in 3rd gear
- D Position: Shifting between 3rd gear and 4th gear
- D Position: Driving in 4th gear
- D Position: Shifting between 4th gear and 5th gear
- D Position: Driving in 5th gear
- Driving in 1st gear (engaged with 1st and 1st-hold clutches) in the sequential sport shift mode
- R Position: Shifting to the R position from the P or N position
- R Position: Driving in reverse gear
- Reverse Inhibitor Control
- P Position
- Lock-up System
- Shift Lever Mechanism
- DTC Troubleshooting
- DTC P0107: Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage Input
- DTC P0108: Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage Input
- DTC P0335: Crankshaft Position (CKP) Sensor A No Signal
- DTC P0339: Crankshaft Position (CKP) Sensor A Intermittent Interruption
- DTC P0340: Camshaft Position (CMP) Sensor No signal
- DTC P0344: Camshaft Position (CMP) Sensor Intermittent Interruption
- DTC P0385: Crankshaft Position (CKP) Sensor B No signal
- DTC P0389: Crankshaft Position (CKP) Sensor B Intermittent Interruption
- DTC P062F: Powertrain Control Module (PCM) Internal Control Module Keep Alive Memory (KAM) Error
- DTC P0705: Short in Transmission Range Switch Circuit (Multiple Shift-position Input)
- DTC P0706: Open in Transmission Range Switch Circuit
- DTC P0711: Problem in ATF Temperature Sensor Circuit
- DTC P0712: Short in ATF Temperature Sensor Circuit
- DTC P0713: Open in ATF Temperature Sensor Circuit
- DTC P0716: Problem in Input Shaft (Mainshaft) Speed Sensor Circuit; DTC P0717: Problem in Input Shaft (Mainshaft) Speed Sensor Circuit (No Signal Input)
- DTC P0718: Input Shaft (Mainshaft) Speed Sensor Intermittent Failure
- DTC P0721: Problem in Output Shaft (Countershaft) Speed Sensor Circuit; DTC P0722: Problem in Output Shaft (Countershaft) Speed Sensor Circuit (No Signal Input)
- DTC P0723: Output Shaft (Countershaft) Speed Sensor Intermittent Failure
- DTC P0731: Problem in 1st Clutch and 1st Clutch Hydraulic Circuit
- DTC P0732: Problem in 2nd Clutch and 2nd Clutch Hydraulic Circuit
- DTC P0733: Problem in 3rd Clutch and 3rd Clutch Hydraulic Circuit
- DTC P0734: Problem in 4th Clutch and 4th Clutch Hydraulic Circuit
- DTC P0735: Problem in 5th Clutch and 5th Clutch Hydraulic Circuit
- DTC P0741: Torque Converter Clutch Hydraulic Circuit Stuck OFF
- DTC P0746: A/T Clutch Pressure Control Solenoid Valve A Stuck OFF
- DTC P0747: A/T Clutch Pressure Control Solenoid Valve A Stuck ON
- DTC P0751: Shift Solenoid Valve A Stuck OFF
- DTC P0752: Shift Solenoid Valve A Stuck ON
- DTC P0756: Shift Solenoid Valve B Stuck OFF
- DTC P0757: Shift Solenoid Valve B Stuck ON
- DTC P0761: Shift Solenoid Valve C Stuck OFF
- DTC P0762: Shift Solenoid Valve C Stuck ON
- DTC P0766: Shift Solenoid Valve D Stuck OFF
- DTC P0767: Shift Solenoid Valve D Stuck ON
- DTC P0776: A/T Clutch Pressure Control Solenoid Valve B Stuck OFF
- DTC P0777: A/T Clutch Pressure Control Solenoid Valve B Stuck ON
- DTC P0796: A/T Clutch Pressure Control Solenoid Valve C Stuck OFF
- DTC P0797: A/T Clutch Pressure Control Solenoid Valve C Stuck ON
- DTC P0812: Open in Transmission Range Switch ATP R Switch Circuit
- DTC P0815: Short in Transmission Gear Selection Switch Upshift Switch Circuit, or Transmission Gear Selection Switch Upshift Switch Stuck ON
- DTC P0816: Short in Transmission Gear Selection Switch Downshift Switch Circuit, or Transmission Gear Selection Switch Downshift Switch Stuck ON
- DTC P0842: Short in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck ON
- DTC P0843: Open in 2nd Clutch Transmission Fluid Pressure Switch Circuit, or 2nd Clutch Transmission Fluid Pressure Switch Stuck OFF
- DTC P0847: Short in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck ON
- DTC P0848: Open in 3rd Clutch Transmission Fluid Pressure Switch Circuit, or 3rd Clutch Transmission Fluid Pressure Switch Stuck OFF
- DTC P0872: Short in 4th Clutch Transmission Fluid Pressure Switch Circuit, or 4th Clutch Transmission Fluid Pressure Switch Stuck ON
- DTC P0873: Open in 4th Clutch Transmission Fluid Pressure Switch Circuit, or 4th Clutch Transmission Fluid Pressure Switch Stuck OFF
- DTC P0957: Short in Transmission Gear Selection Switch Circuit, or Transmission Gear Selection Switch Stuck ON
- DTC P0958: Open in Transmission Gear Selection Switch Circuit, or Transmission Gear Selection Switch Stuck OFF
- DTC P0962: Problem in A/T Clutch Pressure Control Solenoid Valve A Circuit
- DTC P0963: Problem in A/T Clutch Pressure Control Solenoid Valve A
- DTC P0966: Problem in A/T Clutch Pressure Control Solenoid Valve B Circuit
- DTC P0967: Problem in A/T Clutch Pressure Control Solenoid Valve B
- DTC P0970: Problem in A/T Clutch Pressure Control Solenoid Valve C Circuit
- DTC P0971: Problem in A/T Clutch Pressure Control Solenoid Valve C
- DTC P0973: Short in Shift Solenoid Valve A Circuit
- DTC P0974: Open in Shift Solenoid Valve A Circuit
- DTC P0976: Short in Shift Solenoid Valve B Circuit (Short)
- DTC P0977: Open in Shift Solenoid Valve B Circuit (Open)
- DTC P0979: Short in Shift Solenoid Valve C Circuit
- DTC P0980: Open in Shift Solenoid Valve C Circuit
- DTC P0982: Short in Shift Solenoid Valve D Circuit
- DTC P0983: Open in Shift Solenoid Valve D Circuit
- DTC P16C0: PCM A/T Control System Incomplete Updated
- DTC P1717: Open in Transmission Range Switch ATP RVS Switch Circuit
- DTC P1743: Problem in Shift Control System; Shift Valve E Stuck OFF
- DTC P1744: Problem in Shift Control System; Shift Valve E Stuck ON
- DTC P1745: Problem in Shift Control System; Servo Control Valve Stuck OFF or Servo Control Valve Stuck ON
- DTC P1780: Problem in Shift Control System
- DTC P2122: Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit Low Voltage Input
- DTC P2123: Accelerator Pedal Position (APP) Sensor A (Throttle Position Sensor D) Circuit High Voltage Input
- DTC U0028: F-CAN Communication Circuit Error (F-CAN Bus OFF)
- DTC U0122: Lost Communication with VSA Modulator-Control Unit
- DTC U0155: Lost Communication with Gauge Control Module
- Road Test
- Stall Speed Test
- Pressure Test
- Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- A/T Clutch Pressure Control Solenoid Valve A Test
- A/T Clutch Pressure Control Solenoid Valve B Test
- A/T Clutch Pressure Control Solenoid Valve A and B Replacement
- A/T Clutch Pressure Control Solenoid Valve C Test
- A/T Clutch Pressure Control Solenoid Valve C Replacement
- Input Shaft (Mainshaft) Speed Sensor Replacement
- Output Shaft (Countershaft) Speed Sensor Replacement
- 2nd Clutch Transmission Fluid Pressure Switch Replacement
- 3rd Clutch Transmission Fluid Pressure Switch Replacement
- 4th Clutch Transmission Fluid Pressure Switch Replacement
- ATF Temperature Sensor Replacement
- ATF Level Check
- ATF Replacement
- Transfer Assembly Fluid Replacement
- Transfer Assembly Inspection
- Transfer Assembly Removal
- Transfer Assembly Installation
- Transfer Breather Hose Replacement
- Transmission Removal
- Transmission Installation
- ATF Cooler Cleaning
- ATF Cooler Hose Replacement
- ATF Cooler Replacement
- Shift Lever Removal
- Shift Lever Installation
- Shift Lever Knob Replacement
- Shift Lever Disassembly/Reassembly
- Shift Lever Bracket Base Replacement
- Shift Lever Boot and A/T Gear Position Indicator Panel Replacement
- Shift Cable Replacement
- Shift Cable Adjustment
- A/T Gear Position Indicator
- Component Location Index
- Circuit Diagram
- Transmission Range Switch Test
- Transmission Range Switch Replacement
- Transmission Gear Selection Switch Test
- Transmission Gear Selection Switch Replacement
- A/T Gear Position Indicator Panel Light Harness Replacement
- A/T Gear Position Indicator Panel Light Bulb Replacement
- A/T Interlock System
- Component Location Index
- Circuit Diagram
- Shift Lock System Circuit Troubleshooting
- Key Interlock System Circuit Troubleshooting
- Shift Lock Solenoid Test
- Shift Lock Solenoid Replacement
- Shift Lock Stop, Shift Lock Stop Cushion Replacement
- Shift Lock Release Replacement
- Park Pin Switch Test
- Park Pin Switch Replacement
- Transmission Disassembly
- Transmission Housing
- Reverse Idler Gear Removal/ Installation
- Reverse Idler Gear Disassembly/ Inspection/Reassembly
- Secondary Shaft ATF Feed Pipe Cap Removal
- Secondary Shaft ATF Feed Pipe Cap Installation
- Secondary Shaft ATF Feed Pipe Cap, Feed Pipe Replacement
- ATF Filter Removal/Inspection/ Installation
- Mainshaft Bearing Removal
- Mainshaft Bearing Installation
- Intermediary Shaft Bearing Replacement
- Park Lever Shaft Bearing Replacement
- Selector Control Shaft Bearing Replacement
- Selector Control Shaft Oil Seal Replacement
- Valve Body
- Valve Body Repair
- Valve Body Valve Installation
- Main Valve Body Disassembly, Inspection, and Reassembly
- ATF Pump Inspection
- Secondary Valve Body Disassembly, Inspection, and Reassembly
- Regulator Valve Body Disassembly, Inspection, and Reassembly
- Accumulator Body Disassembly; Inspection, and Reassembly
- Shift Solenoid Valve Removal and Installation
- Torque Converter Housing
- Shafts and Clutches
- Mainshaft Disassembly, Inspection, and Reassembly
- Mainshaft 4th Gear Replacement
- Countershaft Disassembly
- Countershaft Idler Gear and 4th Gear Axial Clearance Inspection
- Countershaft Reassembly
- Secondary Shaft Disassembly
- Secondary Shaft 1st Gear Axial Clearance Inspection
- 1st Gear One-way Clutch Inspection
- 1st Clutch Hub Replacement
- Secondary Shaft Reassembly
- Secondary Shaft Installation Height Inspection/Adjustment
- Intermediary Shaft Disassembly, Inspection, and Reassembly
- Intermediary Shaft 4th Gear Removal
- Intermediary Shaft 4th Gear Installation
- Intermediary Shaft 3rd Gear Axial Clearance Inspection
- Intermediary Shaft Installation Height Inspection/Adjustment
- Clutch Disassembly
- Clutch Inspection
- Clutch Wave-plate Phase Difference Inspection
- Clutch Clearance Inspection
- Clutch Reassembly
- Transmission Reassembly
- A/T Differential
- Transfer Output Shaft
- Transfer Assembly
- Inspection
- Disassembly
- Transfer Hypoid Drive Gear Bearing Replacement
- Transfer Output Shaft (Hypoid Gear) Bearing Removal/Installation
- Transfer Housing Tapered Roller Bearing Outer Race Replacement
- Transfer Cover Tapered Roller Bearing Outer Race Removal/Installation
- Transfer Cover Oil Seal Replacement
- Reassembly
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.