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DTC P0791 [JA5AX-EL]

id050206810600

DTC P0791 | Intermediate sensor circuit malfunction (open/short)
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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
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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. (See TCM REMOVAL/INSTALLATION [JA5AX-EL].)
No | Go to next step.
13 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [JA5AX-EL].) • Is there any DTC present? | Yes | Go to applicable DTC inspection.
No | Troubleshooting completed.