DTC P0689 [MZI-3.7]

id0102d2872200

DTC P0689

ECM/PCM power relay sense circuit low

DETECTION CONDITION

•  This DTC sets when the passive anti theft system (PATS) system indicates the key is in ON or START position and the ignition switch position run circuit indicates OFF, ACC, or LOCK position.

POSSIBLE CAUSE

•  Ignition circuit fuse (MAIN, IG KEY 1, IG KEY 2)

•  Open circuit between battery positive terminal and PCM terminal 1BD

•  Short to ground circuit between battery positive terminal and PCM terminal 1BD

•  Ignition switch malfunction

•  PATS system malfunction

DTC P0689	ECM/PCM power relay sense circuit low
DETECTION CONDITION	• This DTC sets when the passive anti theft system (PATS) system indicates the key is in ON or START position and the ignition switch position run circuit indicates OFF, ACC, or LOCK position.
POSSIBLE CAUSE	• Ignition circuit fuse (MAIN, IG KEY 1, IG KEY 2) • Open circuit between battery positive terminal and PCM terminal 1BD • Short to ground circuit between battery positive terminal and PCM terminal 1BD • Ignition switch malfunction • PATS system malfunction

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT ALL OTHER PATS DTCs • Repair all other PATS DTCs before P0689. (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM].) • Have all other PATS DTCs been diagnosed?	Yes	Go to the next step.
3		No	(See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [ADVANCED KEYLESS SYSTEM].) (See IMMOBILIZER SYSTEM COMPONENT REPLACEMENT/KEY ADDITION AND CLEARING [KEYLESS ENTRY SYSTEM].)
4	INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged, pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace suspected part, then go to Step 7.
4		No	Go to the next step.
5	INSPECT BATTERY POSITIVE CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between PCM terminal 1BD (wiring harness-side) and body ground. • Is the voltage B+?	Yes	Go to the next step.
5		No	Repair or replace suspected part, then go to Step 7.
6	INSPECT FOR CORRECT PCM OPERATION • Disconnect all the PCM connectors. • Visually inspect for: ― Pushed out pins ― Corrosion • Connect all the PCM connectors and verify that they seat correctly. • Retrieve DTCs using the M-MDS. • Is the PENDING CODE for this DTC present?	Yes	Go to the next step.
6		No	The system is correctly. Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0689 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Clear the DTC from the PCM memory using the M-MDS. • Perform the “KOEO or KOER self-test” using the M‐MDS. (See KOEO/KOER SELF TEST [MZI-3.7].) • Is the PENDING CODE for the DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZI-3.7].)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
8		No	Troubleshooting completed.