DTC P0691:00 [MZ-CD 1.6]

DTC P0691:00	Cooling fan control relay No.1 control circuit low
DETECTION CONDITION	• The PCM monitors the cooling fan relay No.1 control signal. If the voltage at PCM terminal 312 remains low for 0.5 s. while the cooling fan relay No.1 control circuit is not actuated, the PCM determines that there is a cooling fan relay No.1 control circuit short to ground.
POSSIBLE CAUSE	• Cooling fan relay No.1 terminal malfunction • Short to ground in the wiring harness between cooling fan relay No.1 terminal E and PCM terminal 312 • PCM connector or terminal malfunction • PCM malfunction

DTC P0691:00

Cooling fan control relay No.1 control circuit low

DETECTION CONDITION

• The PCM monitors the cooling fan relay No.1 control signal. If the voltage at PCM terminal 312 remains low for 0.5 s. while the cooling fan relay No.1 control circuit is not actuated, the PCM determines that there is a cooling fan relay No.1 control circuit short to ground.

POSSIBLE CAUSE

• Cooling fan relay No.1 terminal malfunction

• Short to ground in the wiring harness between cooling fan relay No.1 terminal E and PCM terminal 312

• PCM connector or terminal malfunction

• PCM malfunction

STEP	INSPECTION	ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No	Go to the next step.
3	INSPECT COOLING FAN RELAY NO.1 TERMINAL CONDITION • Remove the cooling fan relay No.1. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the terminals, then go to Step 6.
No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there any malfunction?	Yes	Repair or replace the connector and/or terminals, then go to Step 6.
No	Go to the next step.
5	INSPECT COOLING FAN RELAY NO.1 CONTROL SIGNAL CIRCUIT FOR SHORT TO GROUND • Switch the ignition to off. • Disconnect the cooling fan relay No.1 and PCM connectors. • Inspect continuity between cooling fan relay No.1 terminal E (wiring harness-side) and body ground. • Is there continuity?	Yes	Repair or replace for a possible short to ground, then go to the next step.
No	Intermittent concern exists. Go to the next step.
6	VERIFY THAT DTC P0691:00 TROUBLESHOOTING IS COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the M-MDS. • Run the vehicle under the FREEZE FRAME DATA stored condition. • Is the same DTC present?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].) Go to the next step.
No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE • Perform the after repair procedure. (See AFTER REPAIR PROCEDURE [MZ-CD 1.6].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZ-CD 1.6].)
No	DTC troubleshooting completed.

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED

• Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

• Verify related service repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1 TERMINAL CONDITION

• Remove the cooling fan relay No.1.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the terminals, then go to Step 6.

Go to the next step.

INSPECT PCM CONNECTOR CONDITION

• Disconnect the PCM connector.

• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair or replace the connector and/or terminals, then go to Step 6.

Go to the next step.

INSPECT COOLING FAN RELAY NO.1 CONTROL SIGNAL CIRCUIT FOR SHORT TO GROUND

• Switch the ignition to off.

• Disconnect the cooling fan relay No.1 and PCM connectors.

• Inspect continuity between cooling fan relay No.1 terminal E (wiring harness-side) and body ground.

• Is there continuity?

Yes

Repair or replace for a possible short to ground, then go to the next step.

Intermittent concern exists.

Go to the next step.

VERIFY THAT DTC P0691:00 TROUBLESHOOTING IS COMPLETED

• Make sure to reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

• Run the vehicle under the FREEZE FRAME DATA stored condition.

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [MZ-CD 1.6].)

Go to the next step.

VERIFY AFTER REPAIR PROCEDURE

• Perform the after repair procedure.

(See AFTER REPAIR PROCEDURE [MZ-CD 1.6].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [MZ-CD 1.6].)

DTC troubleshooting completed.