Electrical System

ELECTRICAL SYSTEM SYMPTOM CHART

Diagnostic Trouble Code ⁽¹⁾

[D₄ ] Indicator Light

Symptom

Possible Cause

Reference

P1753 (1)

Blinks

Lock-up clutch does not engage.
Lock-up clutch does not disengage.
Unstable idle speed.

Disconnected lock-up control solenoid valve connector
Short or open in lock-up control solenoid valve A wire
Faulty lock-up control solenoid valve A

TROUBLESHOOTING FLOWCHART - LOCK-UP CONTROL SOLENOID VALVE A

P1758 (2)

Blinks

Lock-up clutch does not engage.

Disconnected lock-up control solenoid valve connector
Short or open in lock-up control solenoid valve B wire
Faulty lock-up control solenoid valve B

TROUBLESHOOTING FLOWCHART - LOCK-UP CONTROL SOLENOID VALVE B

P1705 (5)

Blinks

Fails to shift other than 2nd - 4th gears.
Lock-up clutch does not engage.

Short in A/T gear position switch wire
Faulty A/T gear position switch

TROUBLESHOOTING FLOWCHART - A/T GEAR POSITION SWITCH (SHORT)

P1706 (6)

OFF

Fails to shift other than 2nd - 4th gears.
Lock-up clutch does not engage.
Lock-up clutch engages and disengages alternately.

Disconnected A/T gear position switch connector
Open in A/T gear position switch wire
Faulty A/T gear position switch

TROUBLESHOOTING FLOWCHART - A/T GEAR POSITION SWITCH (OPEN)

P0753 (7)

Blinks

Fails to shift (between 1st - 4th gear only).

Disconnected shift control solenoid valve connector
Short or open in shift control solenoid valve A wire
Faulty shift control solenoid valve A

TROUBLESHOOTING FLOWCHART - SHIFT CONTROL SOLENOID VALVE A

P0758 (8)

Blinks

Fails to shift (between 3rd - 4th gear only).

Disconnected shift control solenoid valve connector
Short or open in shift control solenoid valve B wire
Faulty shift control solenoid valve B

TROUBLESHOOTING FLOWCHART - SHIFT CONTROL SOLENOID VALVE B

P0720 (9)

Blinks

Lock-up clutch does not engage.

Disconnected countershaft speed sensor connector
Short or open in countershaft speed sensor wire
Faulty countershaft speed sensor

TROUBLESHOOTING FLOWCHART - COUNTERSHAFT SPEED SENSOR

P0715 (15)

OFF

Transmission jerks hard when shifting.

Disconnected mainshaft speed sensor connector
Short or open in mainshaft speed sensor wire
Faulty mainshaft speed sensor

TROUBLESHOOTING FLOWCHART - MAINSHAFT SPEED SENSOR

P1768 (16)

Blinks

Transmission jerks hard when shifting.
Lock-up clutch does not engage.

Disconnected linear solenoid connector
Short or open in linear solenoid wire
Faulty linear solenoid

TROUBLESHOOTING FLOWCHART - LINEAR SOLENOID

P0740 (40)

OFF

Lock-up clutch does not engage.
Lock-up clutch does not disengage.
Unstable idle speed.

Faulty lock-up control system

TROUBLESHOOTING FLOWCHART - LOCK-UP CONTROL SYSTEM

P0730 (41)

OFF

Fails to shift (between 1st - 3rd or 3rd - 4th gears only).

Faulty shift control system

TROUBLESHOOTING FLOWCHART - SHIFT CONTROL SYSTEM

P0700 (none)

Any automatic transmission problem
To eliminate DTC P0700, troubleshoot the other automatic transmission problem(s) according to the DTC(s) indicated.

⁽¹⁾	The DTC in parentheses is the code the [D₄ ] indicator light blinks when the service check connector is connected with the special tool (SCS service connector).

NOTE: When the OBD II Scan Tool or Honda PGM Tester indicate the DTC(s) for the automatic transmission control system, the scan tool or tester also indicates code P0700 simultaneously. Code P0700 means detection of some automatic transmission problem on the PGM Fl control system.

If the self-diagnostic [D₄ ] indicator light does not blink, perform an inspection according to the table below.

ELECTRICAL SYSTEM SYMPTOM CHART

Symptom	Inspection	Reference
[D₄ ] indicator light does not come on for two seconds after ignition is first turned on (II).	--	TROUBLESHOOTING FLOWCHART - [D4] INDICATOR LIGHT DOES NOT COME ON
[D₄ ] indicator light is on constantly (not blinking) whenever the ignition is on (II).	--	TROUBLESHOOTING FLOWCHART - [D4] INDICATOR LIGHT ON CONSTANTLY
Shift lever cannot be moved from [P] position with the brake pedal depressed.	Check interlock system-Shift lock system	TROUBLESHOOTING FLOWCHART - INTERLOCK SYSTEM - SHIFT LOCK SYSTEM
Ignition key cannot be moved from ACC (I) position to LOCK (0) position while pushing the ignition key with the shift lever is in [P] position.	Check interlock system-Key interlock system	TROUBLESHOOTING FLOWCHART - INTERLOCK SYSTEM - KEY INTERLOCK SYSTEM

NOTE:

If a customer describes the symptom for code P1706 (6), it will be necessary to recreate the symptom by test-driving, then recheck the DTC.
The [D₄ ] indicator light and the Malfunction Indicator Lamp (MIL) may come on simultaneously. Check the PGM-FI system according to the DTC, then reset the memory by removing the BACK UP (RADIO) fuse in the under-hood fuse/relay box for more than 10 seconds. Drive the vehicle for several minutes at a speed over 30 mph (50 km/h), then recheck the DTC.
Disconnecting the BACK UP (RADIO) fuse also cancels the radio anti-theft code, preset stations and the clock setting. Get the customer's code number, and make note of the radio presets before removing the fuse so you can reset them.