Honda Engine Shut Off Diagnostics

Honda Engine Shuts Off, But Power Mode Stays in ‘On’ or ‘Accessory’

With Honda models with one-push start, when your customer shifts into Park and shuts off the engine, does the power mode stay in 'ON' or 'ACCESSORY?'

Models: Honda models with one-push start.

Problem: When your customer shifts into Park and shuts off the engine, does the power mode stay in ON or ACCESSORY? The culprit could be a misadjusted shift cable. If it’s not adjusted correctly, it puts pressure on the shift lever, keeping the park pin switch from opening. The power control unit needs the park pin switch position input to switch the power mode to VEHICLE OFF (LOCK).

Solution: To find and fix this problem, hook up a scan tool and look at the data list for the “ONE-PUSH START/PCU” and the transmission gear position called “AT SHIFT POSITION.”

Shift into Park while keeping your foot on the brake pedal. Then, without pressing the release button, pull back on the shift lever (toward Reverse). The AT SHIFT POSITION P signal should read ON, and the AT SHIFT POSITION P-PIN signal should read OFF.

Another test is to shift into Reverse while pressing the brake pedal. Then, press the release button and gently push the shift lever into Park. When it goes into Park, the AT SHIFT POSTION P signal should then read ON and the AT SHIFT POSITION P-PIN signal should read OFF.

If you don’t get the expected results from either of those tests, refer to the service manual and adjust the shift cable.

Courtesy of American Honda Motor Company

You May Also Like

Honda Oil System Inspection

The leading cause of low oil pressure-related complaints with Honda vehicles is the oil level.

Just about every engine lubrication system, including Honda’s, operates the same in theory. An oil pump generates the pressure, oil is sent to oil galleys, and then flows back into the pan. In practice, however, it is much more complicated. An oil system practically manages a controlled leak into the oil pan.

Lexus Air Ride Repair

A conversion kit might cost less and provide better long-term results for the customer.

Toyota Direct Injection? Port Injection? Why Not Both?

Port fuel injection and direct fuel injection systems each have their advantages and disadvantages.

Toyota Squeaking Noise From Rear Suspension 

Follow the repair procedure in this bulletin to address this condition.

Toyota Milliwave Calibration Tips

Calibration is necessary due to several factors affecting the radar’s functionality.

Other Posts

Mercedes-Benz ABC Suspensions

The system provides great ride & handling, but it can be complicated to service if you do not have the right training.

Now Available – March’s Digital Edition of ShopOwner

The March issue includes technical and management content and is free to download.

Chassis Diagnostic Procedures

The secret is to be quiet & listen, as the customer will tell you almost everything relevant to the repair you need to know.

Today’s Fuel Pressure Diagnostics

Direct injection pressure is measured with sensors, and the signals are used to determine pump speed and/or volume.