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 DTC P0791 [JA5AX-EL]

DTC P0791 [JA5AX-EL]


id050206810600

DTC P0791

Intermediate sensor circuit malfunction (open/short)

DETECTION CONDITION

• Rotation speed of output gear (intermediate sensor) is low when vehicle speed and engine speed exceed the preprogrammed value.
Diagnostic support note:
• This is continuous monitor (CCM).
• MIL illuminates if TCM detects the above malfunction condition.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• AT warning light indication.
• DTC is stored in TCM memory.

POSSIBLE CAUSE

• Intermediate sensor malfunction.
• Short to ground between intermediate sensor terminal B and TCM terminal 1K
• Short to ground between intermediate sensor terminal A and TCM terminal 1X
• Open circuit between intermediate sensor terminal B and TCM terminal 1K
• Open circuit between intermediate sensor terminal A and TCM terminal 1X
• Damaged connectors between intermediate sensor and TCM.
• TCM malfunction.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME PID DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME PID DATA on repair order, then go to next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Bulletins and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT TERMINAL COMPONENT NO.2 (8-PIN) CONNECTOR FOR POOR CONNECTION
• Turn ignition key to OFF.
• Disconnect terminal component No.2 (8-pin) connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Are terminals okay?
Yes
Go to next step.
No
Repair or replace terminals, then go to Step 12.
4
INSPECT INTERMEDIATE SENSOR RESISTANCE
• Measure resistance between terminal component No.2 (8-pin) (transaxle case side).
• Is resistance within 513-627 ohms between terminal component No.2 (8-pin) terminal C and D (transaxle case side)?
Yes
Go to next step.
No
Go to Step 8
5
INSPECT TCM CONNECTOR FOR POOR CONNECTION
• Disconnect TCM connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Are terminals okay?
Yes
Go to next step.
No
Repair terminals, then go to Step 12.
6
INSPECT TERMINAL COMPONENT NO.2 (8-PIN) CIRCUIT FOR OPEN
• Check terminal component No.2 (8-pin) terminals (harness-side) and TCM terminals (harness-side).
- C and 1K
- D and 1X
• Is there continuity?
Yes
Go to next step.
No
Repair or replace harness, then go to Step 12.
7
INSPECT TERMINAL COMPONENT NO.2 (8-PIN) CIRCUIT FOR SHORT TO GROUND
• Check terminal component No.2 (8-pin) terminal (harness-side) and body ground.
- C and body ground
- D and body ground
• Is there any continuity?
Yes
Repair or replace harness, then go to Step 12.
No
Go to Step 12.
8
INSPECT COUPLER COMPONENT (8-PIN) CONNECTOR FOR POOR CONNECTION
• Disassemble the control valve body cover.
• Disconnect coupler component (8-pin) connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Are terminals okay?
Yes
Go to next step.
No
Repair terminals, then go to Step 12.
9
INSPECT INTERMEDIATE SENSOR RESISTANCE
• Measure resistance between coupler component (8-pin).
• Is resistance within 513-627 ohms between coupler component (8-pin) terminal D and C (part side)?
Yes
Repair or replace coupler component, then go to Step 12.
No
Go to next step.
10
INSPECT INTERMEDIATE SENSOR CONNECTOR FOR POOR CONNECTION
• Disassemble the transaxle.
• Disconnect intermediate sensor connector.
• Check for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Are terminals okay?
Yes
Go to next step.
No
Repair terminals, then go to Step 12.
11
INSPECT INTERMEDIATE SENSOR RESISTANCE
• Measure resistance between intermediate sensor.
• Is resistance within 513-627 ohms between intermediate sensor connector terminal A and B (part side)?
Yes
Repair or replace coupler component, then go to next step.
No
Replace intermediate sensor, then go to next step.
12
VERIFY TROUBLESHOOTING OF DTC P0715 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS or equivalent.
• Drive vehicle with vehicle speed 40 km/h {25 mph} or above and engine speed 1500 rpm or above for 2 second or more
• Repeat Step ii two times.
• Is same DTC present?
Yes
Replace TCM, then go to next step.
No
Go to next step.
13
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.