Standard Resistance Check for open

Tester Connections

Specified Conditions

HT (A4-1) - HA1A (E5-2)

Below 1 Q

HT (A5-1) - HA2A (E5-1)

Standard Resistance (Check for short)

Tester Connections

Specified Conditions

HT (A4-1) or HA1A (E5-2) - Body ground

10 kQ or higher

HT (A5-1) or HA2A (E5-1) - Body ground

(4) Reconnect the A/F sensor connector.

(5) Reconnect the ECM connector.

(b) Check the harness and the connector between the A/F sensor and A/F sensor heater relay.

(1) Disconnect the A4 or A5 A/F sensor connector.

(2) Remove the A/F sensor heater relay from the engine room relay block.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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